added migrated 2.x add-ons

Signed-off-by: Kai Kreuzer <kai@openhab.org>

bundles/org.openhab.binding.smartmeter/src/main/feature/feature.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<features name="org.openhab.binding.smartmeter-${project.version}" xmlns="http://karaf.apache.org/xmlns/features/v1.4.0">
+	<repository>mvn:org.openhab.core.features.karaf/org.openhab.core.features.karaf.openhab-core/${ohc.version}/xml/features</repository>
+
+	<feature name="openhab-binding-smartmeter" description="Smartmeter Binding" version="${project.version}">
+		<feature>openhab-runtime-base</feature>
+		<feature>openhab-transport-serial</feature>
+		<bundle start-level="80">mvn:org.openhab.addons.bundles/org.openhab.binding.smartmeter/${project.version}</bundle>
+	</feature>
+</features>

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/SmartMeterBindingConstants.java

@@ -0,0 +1,49 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.openhab.binding.smartmeter.internal.ObisCode;
+import org.openhab.core.thing.ThingTypeUID;
+
+/**
+ * The {@link SmlReaderBinding} class defines common constants, which are
+ * used across the whole binding.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ */
+@NonNullByDefault
+public class SmartMeterBindingConstants {
+
+    public static final String BINDING_ID = "smartmeter";
+    // List of all Thing Type UIDs
+    public static final ThingTypeUID THING_TYPE_SMLREADER = new ThingTypeUID(BINDING_ID, "meter");
+    public static final String CONFIGURATION_PORT = "port";
+    public static final String CONFIGURATION_SERIAL_MODE = "mode";
+    public static final String CONFIGURATION_BAUDRATE = "baudrate";
+    public static final String CONFIGURATION_CONFORMITY = "conformity";
+    public static final String CONFIGURATION_INIT_MESSAGE = "initMessage";
+    public static final String CONFIGURATION_CONVERSION = "conversionRatio";
+    public static final String CONFIGURATION_CHANNEL_NEGATE = "negate";
+    public static final String CHANNEL_PROPERTY_OBIS = "obis";
+    public static final String OBIS_PATTERN_CHANNELID = getObisChannelId(ObisCode.OBIS_PATTERN);
+    /** Obis format */
+    public static final String OBIS_FORMAT_MINIMAL = "%d-%d:%d.%d.%d";
+    /** Obis format */
+    public static final String OBIS_FORMAT = OBIS_FORMAT_MINIMAL + "*%d";
+    public static final String CHANNEL_TYPE_METERREADER_OBIS = "channel-type:" + BINDING_ID + ":obis";
+
+    public static String getObisChannelId(String obis) {
+        return obis.replaceAll("\\.", "-").replaceAll(":|\\*", "_");
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/SmartMeterConfiguration.java

@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter;
+
+/**
+ * The {@link SmartMeterConfiguration} is the class used to match the
+ * thing configuration.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ */
+public class SmartMeterConfiguration {
+
+    public String port;
+    public Integer refresh;
+    public Integer baudrateChangeDelay;
+    public String initMessage;
+    public String baudrate;
+    public String mode;
+    public String conformity;
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/connectors/ConnectorBase.java

@@ -0,0 +1,170 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.connectors;
+
+import java.io.IOException;
+import java.time.Duration;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.reactivestreams.Publisher;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import io.reactivex.BackpressureStrategy;
+import io.reactivex.Flowable;
+import io.reactivex.FlowableEmitter;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Represents a basic implementation of a SML device connector.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ * @author Mathias Gilhuber - Also-By
+ */
+@NonNullByDefault
+public abstract class ConnectorBase<T> implements IMeterReaderConnector<T> {
+
+    protected final Logger logger = LoggerFactory.getLogger(getClass());
+    /**
+     * The name of the port where the device is connected as defined in openHAB configuration.
+     */
+    private String portName;
+    public static final int NUMBER_OF_RETRIES = 3;
+
+    /**
+     * Contructor for basic members.
+     *
+     * This constructor has to be called from derived classes!
+     *
+     */
+    protected ConnectorBase(String portName) {
+        this.portName = portName;
+    }
+
+    /**
+     * Reads a new IO message.
+     *
+     * @param initMessage
+     * @return The payload
+     * @throws IOException Whenever there was a reading error.
+     */
+    protected abstract T readNext(byte @Nullable [] initMessage) throws IOException;
+
+    /**
+     * Whether to periodically emit values.
+     *
+     * @return whether periodically emit values or not
+     */
+    protected boolean applyPeriod() {
+        return false;
+    }
+
+    /**
+     * Whether to apply a retry handling whenever the read out failed.
+     *
+     * @return whether to use the retry handling or not.
+     */
+    protected boolean applyRetryHandling() {
+        return false;
+    }
+
+    /**
+     * If reading of meter values fail a retry handling shall be implemented here.
+     * The provided publisher publishes the errors.
+     * If a retry shall happen, the returned publisher shall emit an event-
+     *
+     * @param period
+     * @param attempts
+     * @return The publisher which emits events for a retry.
+     */
+    protected Publisher<?> getRetryPublisher(Duration period, Publisher<Throwable> attempts) {
+        return Flowable.fromPublisher(attempts)
+                .zipWith(Flowable.range(1, NUMBER_OF_RETRIES + 1), (throwable, attempt) -> {
+                    if (throwable instanceof TimeoutException || attempt == NUMBER_OF_RETRIES + 1) {
+                        throw new RuntimeException(throwable);
+                    } else {
+                        logger.warn("{}. reading attempt failed: {}. Retrying {}...", attempt, throwable.getMessage(),
+                                getPortName());
+                        return attempt;
+                    }
+                }).flatMap(i -> {
+                    retryHook(i);
+                    Duration additionalDelay = period;
+                    logger.warn("Delaying retry by {}", additionalDelay);
+                    return Flowable.timer(additionalDelay.toMillis(), TimeUnit.MILLISECONDS);
+                });
+    }
+
+    /**
+     * Called whenever a retry shall happen. Clients can do something here.
+     *
+     * @param retryCount The current number of retries
+     */
+    protected void retryHook(int retryCount) {
+    }
+
+    @Override
+    public Publisher<T> getMeterValues(byte @Nullable [] initMessage, Duration period, ExecutorService executor) {
+        Flowable<T> itemPublisher = Flowable.<T> create((emitter) -> {
+            emitValues(initMessage, emitter);
+        }, BackpressureStrategy.DROP);
+
+        Flowable<T> result;
+        if (applyPeriod()) {
+            result = Flowable.timer(period.toMillis(), TimeUnit.MILLISECONDS, Schedulers.from(executor))
+                    .flatMap(event -> itemPublisher).repeat();
+        } else {
+            result = itemPublisher;
+        }
+        if (applyRetryHandling()) {
+            return result.retryWhen(attempts -> {
+                return Flowable.fromPublisher(getRetryPublisher(period, attempts));
+            });
+        } else {
+            return result;
+        }
+    }
+
+    /**
+     * Emitting of values shall happen here. If there is a event based emitting, this can be overriden.
+     *
+     * @param initMessage The message which shall be written before reading the values.
+     * @param emitter The {@link FlowableEmitter} to emit the values to.
+     * @throws IOException thrown if any reading error occurs.
+     */
+    protected void emitValues(byte @Nullable [] initMessage, FlowableEmitter<@Nullable T> emitter) throws IOException {
+        if (!emitter.isCancelled()) {
+            try {
+                emitter.onNext(readNext(initMessage));
+                emitter.onComplete();
+            } catch (IOException e) {
+                if (!emitter.isCancelled()) {
+                    throw e;
+                }
+            }
+        }
+    }
+
+    /**
+     * Gets the name of the serial port.
+     *
+     * @return The actual name of the serial port.
+     */
+    public String getPortName() {
+        return portName;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/connectors/IMeterReaderConnector.java

@@ -0,0 +1,55 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.connectors;
+
+import java.io.IOException;
+import java.time.Duration;
+import java.util.concurrent.ExecutorService;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.reactivestreams.Publisher;
+
+/**
+ * Specifies the generic method to retrieve values from a device
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ * @author Mathias Gilhuber - Also-By
+ */
+@NonNullByDefault
+public interface IMeterReaderConnector<T> {
+
+    /**
+     * Establishes the connection against the device and reads native encoded SML informations.
+     * Ensures that a connection is opened and notifies any attached listeners
+     *
+     * @param serialParmeter
+     * @param period hint for the connector to emit items in this time intervals.
+     * @return native encoded SML informations from a device.
+     */
+    Publisher<T> getMeterValues(byte @Nullable [] initMessage, Duration period, ExecutorService executor);
+
+    /**
+     * Opens the connection to the serial port.
+     *
+     * @throws IOException Whenever something goes wrong while opening the connection.
+     *
+     */
+    void openConnection() throws IOException;
+
+    /**
+     * Closes the connection to the serial port.
+     *
+     */
+    void closeConnection();
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/MeterDevice.java

@@ -0,0 +1,294 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.function.Supplier;
+
+import javax.measure.Quantity;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.connectors.IMeterReaderConnector;
+import org.openhab.binding.smartmeter.internal.helper.ProtocolMode;
+import org.openhab.core.io.transport.serial.SerialPortManager;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import io.reactivex.Flowable;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.plugins.RxJavaPlugins;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * This represents a meter device.
+ * All read values of the device are cached here and can be obtained. The reading can be started with
+ * {@link #readValues(ScheduledExecutorService, Duration)}
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ * @param <T> The type of Payload which is read from the device.
+ */
+@NonNullByDefault
+public abstract class MeterDevice<T> {
+
+    private static final int RETRY_DELAY = 2;
+    private final Logger logger = LoggerFactory.getLogger(MeterDevice.class);
+    /**
+     * Controls wether the device info is logged to the OSGi console.
+     */
+    private boolean printMeterInfo;
+    /**
+     * Map of all values captured from the device during the read request.
+     */
+    private Map<String, MeterValue<?>> valueCache;
+    private byte @Nullable [] initMessage;
+    /**
+     * The id of the SML device from openHAB configuration.
+     */
+    private String deviceId;
+    /**
+     * Used to establish the device connection
+     */
+    IMeterReaderConnector<T> connector;
+    private List<MeterValueListener> valueChangeListeners;
+
+    public MeterDevice(Supplier<SerialPortManager> serialPortManagerSupplier, String deviceId, String serialPort,
+            byte @Nullable [] initMessage, int baudrate, int baudrateChangeDelay, ProtocolMode protocolMode) {
+        super();
+        this.deviceId = deviceId;
+        this.valueCache = new HashMap<>();
+        this.valueChangeListeners = new CopyOnWriteArrayList<>();
+        this.printMeterInfo = true;
+        this.connector = createConnector(serialPortManagerSupplier, serialPort, baudrate, baudrateChangeDelay,
+                protocolMode);
+        RxJavaPlugins.setErrorHandler(error -> {
+            logger.error("Fatal error occured", error);
+        });
+    }
+
+    /**
+     * Creates the actual connector that handles the serial port communication and protocol.
+     *
+     * @param serialPortManagerSupplier Supplies the {@link SerialPortManager} which is used to obtain the serial port
+     *            implementation
+     * @param serialPort The name of the port to communicate with.
+     * @param baudrate The Baudrate to set for communication.
+     * @param baudrateChangeDelay The delay which is used before changing the baudrate (used only for specific
+     *            protocols).
+     * @param protocolMode The {@link ProtocolMode} to use.
+     * @return The connector which handles the serial port communication.
+     */
+    protected abstract IMeterReaderConnector<T> createConnector(Supplier<SerialPortManager> serialPortManagerSupplier,
+            String serialPort, int baudrate, int baudrateChangeDelay, ProtocolMode protocolMode);
+
+    /**
+     * Gets the configured deviceId.
+     *
+     * @return the id of the SmlDevice from openHAB configuration.
+     */
+    public String getDeviceId() {
+        return deviceId;
+    }
+
+    /**
+     * Returns the specified OBIS value if available.
+     *
+     * @param obis the OBIS code which value should be retrieved.
+     * @return the OBIS value as String if available - otherwise null.
+     */
+    @Nullable
+    public String getValue(String obisId) {
+        MeterValue<?> smlValue = getMeterValue(obisId);
+        if (smlValue != null) {
+            return smlValue.getValue();
+        }
+        return null;
+    }
+
+    /**
+     * Returns the specified OBIS value if available.
+     *
+     * @param obis the OBIS code which value should be retrieved.
+     * @return the OBIS value if available - otherwise null.
+     */
+    @SuppressWarnings("unchecked")
+    @Nullable
+    public <Q extends Quantity<Q>> MeterValue<Q> getMeterValue(String obisId) {
+        if (valueCache.containsKey(obisId)) {
+            return (MeterValue<Q>) valueCache.get(obisId);
+        }
+        return null;
+    }
+
+    /**
+     * Gets all currently available OBIS codes.
+     *
+     * @return All cached OBIS codes.
+     */
+    public Collection<String> getObisCodes() {
+        return new ArrayList<>(this.valueCache.keySet());
+    }
+
+    /**
+     * Read values from this device an store them locally against their OBIS code.
+     *
+     * If there is an error in reading, it will be retried {@value #NUMBER_OF_RETRIES} times. The retry will be delayed
+     * by {@code period} seconds.
+     * If its still failing, the connection will be closed and opened again.
+     *
+     * @return The {@link Disposable} which needs to be disposed whenever not used anymore.
+     *
+     */
+    public Disposable readValues(long timeout, ScheduledExecutorService executorService, Duration period) {
+        return Flowable.fromPublisher(connector.getMeterValues(initMessage, period, executorService))
+                .timeout(timeout + period.toMillis(), TimeUnit.MILLISECONDS, Schedulers.from(executorService))
+                .doOnSubscribe(sub -> {
+                    logger.info("Opening connection to {}", getDeviceId());
+                    connector.openConnection();
+                }).doOnError(ex -> {
+                    if (ex instanceof TimeoutException) {
+                        logger.warn("Timeout occured for {}; {}", getDeviceId(), ex.getMessage());
+                    } else {
+                        logger.warn("Failed to read: {}. Closing connection and trying again in {} seconds...; {}",
+                                ex.getMessage(), RETRY_DELAY, getDeviceId(), ex);
+                    }
+                    connector.closeConnection();
+                    notifyReadingError(ex);
+                }).doOnCancel(connector::closeConnection).doOnComplete(connector::closeConnection).share()
+                .retryWhen(
+                        publisher -> publisher.delay(RETRY_DELAY, TimeUnit.SECONDS, Schedulers.from(executorService)))
+                .subscribeOn(Schedulers.from(executorService), true).subscribe((value) -> {
+                    Map<String, MeterValue<?>> obisCodes = new HashMap<>(valueCache);
+                    clearValueCache();
+                    populateValueCache(value);
+                    printInfo();
+                    Collection<String> newObisCodes = getObisCodes();
+                    // notify every removed obis code.
+                    obisCodes.values().stream().filter((val) -> !newObisCodes.contains(val.getObisCode()))
+                            .forEach((val) -> notifyValuesRemoved(val));
+                });
+    }
+
+    /**
+     * Deletes all cached values.
+     *
+     * The method will always be called before new values are populated.
+     */
+    protected void clearValueCache() {
+        valueCache.clear();
+    }
+
+    /**
+     * Called whenever a new value was made available. The value cache needs to be filled here with
+     * {@link #addObisCache(MeterValue)}.
+     *
+     * @param payload The actual payload value.
+     */
+    protected abstract <Q extends Quantity<Q>> void populateValueCache(T payload);
+
+    /**
+     * Adds a {@link MeterValue} to the current cache.
+     *
+     * @param value The value to add.
+     */
+    protected <Q extends Quantity<Q>> void addObisCache(MeterValue<Q> value) {
+        logger.debug("Value changed: {}", value);
+        this.valueCache.put(value.getObisCode(), value);
+        this.valueChangeListeners.forEach((listener) -> {
+            try {
+                listener.valueChanged(value);
+            } catch (Exception e) {
+                logger.error("Meter listener failed", e);
+            }
+        });
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append("Device: ");
+        stringBuilder.append(getDeviceId());
+        stringBuilder.append(System.lineSeparator());
+
+        for (Entry<String, MeterValue<?>> entry : valueCache.entrySet()) {
+            stringBuilder.append("Obis: " + entry.getKey() + " " + entry.getValue().toString());
+            stringBuilder.append(System.lineSeparator());
+        }
+        return stringBuilder.toString();
+    }
+
+    /**
+     * Adds a {@link MeterValueListener} to the list of listeners which gets notified on new values being read.
+     *
+     * @param valueChangeListener The new {@link MeterValueListener}
+     */
+    public void addValueChangeListener(MeterValueListener valueChangeListener) {
+        this.valueChangeListeners.add(valueChangeListener);
+    }
+
+    /**
+     * Removes a {@link MeterValueListener} from the list of listeners.
+     *
+     * @param valueChangeListener The listener to remove.
+     */
+    public void removeValueChangeListener(MeterValueListener valueChangeListener) {
+        this.valueChangeListeners.remove(valueChangeListener);
+    }
+
+    private <Q extends Quantity<Q>> void notifyValuesRemoved(MeterValue<Q> value) {
+        this.valueChangeListeners.forEach((listener) -> listener.valueRemoved(value));
+    }
+
+    private void notifyReadingError(Throwable e) {
+        this.valueChangeListeners.forEach((listener) -> listener.errorOccurred(e));
+    }
+
+    /**
+     * Logs the object information with all given SML values to OSGi console.
+     *
+     * It's only called once - except the config was updated.
+     */
+    protected void printInfo() {
+        if (this.getPrintMeterInfo()) {
+            logger.info("Read out following values: {}", toString());
+            setPrintMeterInfo(false);
+        }
+    }
+
+    /**
+     * Gets if the object information has to be logged to OSGi console.
+     *
+     * @return true if the object information should be logged, otherwise false.
+     */
+    private Boolean getPrintMeterInfo() {
+        return this.printMeterInfo;
+    }
+
+    /**
+     * Sets if the object information has to be logged to OSGi console.
+     */
+    private void setPrintMeterInfo(Boolean printMeterInfo) {
+        this.printMeterInfo = printMeterInfo;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/MeterDeviceFactory.java

@@ -0,0 +1,61 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal;
+
+import java.util.function.Supplier;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.internal.helper.ProtocolMode;
+import org.openhab.binding.smartmeter.internal.iec62056.Iec62056_21MeterReader;
+import org.openhab.binding.smartmeter.internal.sml.SmlMeterReader;
+import org.openhab.core.io.transport.serial.SerialPortManager;
+
+/**
+ * Factory to get the correct device reader for a specific {@link ProtocolMode}
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public class MeterDeviceFactory {
+
+    /**
+     * Gets a concrete {@link MeterDevice} for given values.
+     * 
+     * @param serialPortManagerSupplier The Supplier of a {@link SerialPortManager}
+     * @param mode The {@link ProtocolMode}.
+     * @param deviceId
+     * @param serialPort The serial port identifier to connect ot.
+     * @param initMessage The message which shall be sent before reading values (or to actually make the meter sent
+     *            values).
+     * @param baudrate The baudrate to set before communication.
+     * @param baudrateChangeDelay The change delay before changing the baudrate (used only for specific protocols).
+     * @return The new {@link MeterDevice} or null.
+     */
+    public static @Nullable MeterDevice<?> getDevice(Supplier<SerialPortManager> serialPortManagerSupplier, String mode,
+            String deviceId, String serialPort, byte @Nullable [] initMessage, int baudrate, int baudrateChangeDelay) {
+        ProtocolMode protocolMode = ProtocolMode.valueOf(mode.toUpperCase());
+        switch (protocolMode) {
+            case D:
+            case ABC:
+                return new Iec62056_21MeterReader(serialPortManagerSupplier, deviceId, serialPort, initMessage,
+                        baudrate, baudrateChangeDelay, protocolMode);
+            case SML:
+                return SmlMeterReader.createInstance(serialPortManagerSupplier, deviceId, serialPort, initMessage,
+                        baudrate, baudrateChangeDelay);
+            default:
+                return null;
+        }
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/MeterValue.java

@@ -0,0 +1,128 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal;
+
+import javax.measure.Quantity;
+import javax.measure.Unit;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+
+/**
+ * Represents one value of the meter device.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public class MeterValue<Q extends Quantity<Q>> {
+
+    private String obis;
+    private String value;
+    @Nullable
+    private Unit<? extends Q> unit;
+    @Nullable
+    private String status;
+
+    public MeterValue(String obis, String value, @Nullable Unit<? extends Q> unit, @Nullable String status) {
+        this.obis = obis;
+        this.unit = unit;
+        this.value = value;
+        this.status = status;
+    }
+
+    public MeterValue(String obis, String value, @Nullable Unit<Q> unit) {
+        this(obis, value, unit, null);
+    }
+
+    /**
+     * Gets the values unit.
+     *
+     * @return the string representation of the values unit - otherwise null.
+     */
+    public @Nullable Unit<? extends Q> getUnit() {
+        return unit;
+    }
+
+    /**
+     * Gets the value
+     *
+     * @return the value as String if available - otherwise null.
+     */
+    public String getValue() {
+        return value;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((obis == null) ? 0 : obis.hashCode());
+        result = prime * result + ((status == null) ? 0 : status.hashCode());
+        result = prime * result + ((unit == null) ? 0 : unit.hashCode());
+        result = prime * result + ((value == null) ? 0 : value.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        MeterValue<?> other = (MeterValue<?>) obj;
+        if (!obis.equals(other.obis)) {
+            return false;
+        }
+        if (status == null) {
+            if (other.status != null) {
+                return false;
+            }
+        } else if (!status.equals(other.status)) {
+            return false;
+        }
+        if (unit == null) {
+            if (other.unit != null) {
+                return false;
+            }
+        } else if (!unit.equals(other.unit)) {
+            return false;
+        }
+        if (!value.equals(other.value)) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return "MeterValue [obis=" + obis + ", value=" + value + ", unit=" + unit + "]";
+    }
+
+    public String getObisCode() {
+        return this.obis;
+    }
+
+    public @Nullable String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/MeterValueListener.java

@@ -0,0 +1,48 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal;
+
+import javax.measure.Quantity;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+
+/**
+ * Listener which can be notified whenever new values are read form a meter device.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public interface MeterValueListener {
+
+    /**
+     * Called whenever some (reading-) error occurred.
+     *
+     * @param e The Exception that was thrown.
+     */
+    public void errorOccurred(Throwable e);
+
+    /**
+     * Called whenever some value was added or changed for a meter device.
+     *
+     * @param value The changed value.
+     */
+    public <Q extends Quantity<Q>> void valueChanged(MeterValue<Q> value);
+
+    /**
+     * Called whenever some value was removed from the meter device (not available anymore).
+     *
+     * @param value The removed value.
+     */
+    public <Q extends Quantity<Q>> void valueRemoved(MeterValue<Q> value);
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/ObisCode.java

@@ -0,0 +1,129 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal;
+
+import java.util.Formatter;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.SmartMeterBindingConstants;
+
+/**
+ * Represents an OBIS code.
+ *
+ * @see For more information see https://de.wikipedia.org/wiki/OBIS-Kennzahlen
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public class ObisCode {
+
+    public static final String OBIS_PATTERN = "((?<A>[0-9]{1,3})-(?<B>[0-9]{1,3}):)?(?<C>[0-9]{1,3}).(?<D>[0-9]{1,3}).(?<E>[0-9]{1,3})(\\*(?<F>[0-9][0-9]{1,3}))?";
+
+    private static Pattern obisPattern = Pattern.compile(OBIS_PATTERN);
+    @Nullable
+    private Byte a, b, f;
+    private Byte c, d, e;
+
+    private ObisCode(@Nullable Byte a, @Nullable Byte b, Byte c, Byte d, Byte e, @Nullable Byte f) {
+        this.a = a;
+        this.b = b;
+        this.c = c;
+        this.d = d;
+        this.e = e;
+        this.f = f;
+    }
+
+    /**
+     * Gets a {@link ObisCode} from a String. It must follow the pattern {@value #OBIS_PATTERN}
+     *
+     * @param obis The obis as String.
+     * @return The new Obis code. Can not be null.
+     * @throws IllegalArgumentException If the <code>obis</code> has not the right format.
+     */
+    public static ObisCode from(String obis) throws IllegalArgumentException {
+        try {
+            Matcher matcher = obisPattern.matcher(obis);
+            if (matcher.find()) {
+                String a = matcher.group("A");
+                String b = matcher.group("B");
+                String c = matcher.group("C");
+                String d = matcher.group("D");
+                String e = matcher.group("E");
+                String f = matcher.group("F");
+                return new ObisCode(a != null && !a.isEmpty() ? (byte) (0xFF & Integer.valueOf(a)) : null,
+                        b != null && !b.isEmpty() ? (byte) (0xFF & Integer.valueOf(b)) : null,
+                        (byte) (0xFF & Integer.valueOf(c)), (byte) (0xFF & Integer.valueOf(d)),
+                        (byte) (0xFF & Integer.valueOf(e)),
+                        f != null && !f.isEmpty() ? (byte) (0xFF & Integer.valueOf(f)) : null);
+            }
+            throw new IllegalArgumentException(obis + " is not correctly formated.");
+        } catch (Exception e) {
+            throw new IllegalArgumentException(obis + " is not correctly formated.", e);
+        }
+    }
+
+    /**
+     * Gets the OBIS as a String.
+     * 
+     * @return the obis as string.
+     */
+    public String asDecimalString() {
+        try (Formatter format = new Formatter()) {
+            format.format(SmartMeterBindingConstants.OBIS_FORMAT, a != null ? a & 0xFF : 0, b != null ? b & 0xFF : 0,
+                    c & 0xFF, d & 0xFF, e & 0xFF, f != null ? f & 0xFF : 0);
+            return format.toString();
+        }
+    }
+
+    public @Nullable Byte getAGroup() {
+        return a;
+    }
+
+    public @Nullable Byte getBGroup() {
+        return b;
+    }
+
+    public @Nullable Byte getCGroup() {
+        return c;
+    }
+
+    public @Nullable Byte getDGroup() {
+        return d;
+    }
+
+    public @Nullable Byte getEGroup() {
+        return e;
+    }
+
+    public @Nullable Byte getFGroup() {
+        return f;
+    }
+
+    @Override
+    public String toString() {
+        return asDecimalString();
+    }
+
+    public boolean matches(@Nullable Byte a, @Nullable Byte b, Byte c, Byte d, Byte e, @Nullable Byte f) {
+        return (this.a == null || a == null || this.a.equals(a)) && (this.b == null || b == null || this.b.equals(b))
+                && this.c.equals(c) && this.d.equals(d) && this.e.equals(e)
+                && (this.f == null || f == null || this.f.equals(f));
+    }
+
+    public boolean matches(Byte c, Byte d, Byte e) {
+        return matches(null, null, c, d, e, null);
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/SmartMeterChannelTypeProvider.java

@@ -0,0 +1,114 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal;
+
+import java.net.URI;
+import java.util.Collection;
+import java.util.Locale;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import javax.measure.Quantity;
+import javax.measure.Unit;
+
+import org.eclipse.jdt.annotation.NonNull;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.SmartMeterBindingConstants;
+import org.openhab.core.library.CoreItemFactory;
+import org.openhab.core.thing.type.ChannelType;
+import org.openhab.core.thing.type.ChannelTypeBuilder;
+import org.openhab.core.thing.type.ChannelTypeProvider;
+import org.openhab.core.thing.type.ChannelTypeUID;
+import org.openhab.core.thing.type.StateChannelTypeBuilder;
+import org.openhab.core.types.StateDescriptionFragmentBuilder;
+import org.openhab.core.types.util.UnitUtils;
+import org.osgi.service.component.annotations.Component;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * A {@link ChannelTypeProvider} that listens for changes to the {@link MeterDevice} and updates the
+ * {@link ChannelType}s according to all available OBIS values.
+ * It creates one {@link ChannelType} per available OBIS value.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@Component(service = { ChannelTypeProvider.class, SmartMeterChannelTypeProvider.class })
+public class SmartMeterChannelTypeProvider implements ChannelTypeProvider, MeterValueListener {
+
+    private final Logger logger = LoggerFactory.getLogger(SmartMeterChannelTypeProvider.class);
+
+    private final Map<String, ChannelType> obisChannelMap = new ConcurrentHashMap<>();
+
+    @Override
+    public Collection<ChannelType> getChannelTypes(@Nullable Locale locale) {
+        return obisChannelMap.values();
+    }
+
+    @Override
+    public @Nullable ChannelType getChannelType(ChannelTypeUID channelTypeUID, @Nullable Locale locale) {
+        return obisChannelMap.values().stream().filter(channelType -> channelType.getUID().equals(channelTypeUID))
+                .findFirst().orElse(null);
+    }
+
+    @Override
+    public void errorOccurred(Throwable e) {
+        // Nothing to do if there is an reading error...
+    }
+
+    @Override
+    public <Q extends @NonNull Quantity<Q>> void valueChanged(MeterValue<Q> value) {
+        if (!obisChannelMap.containsKey(value.getObisCode())) {
+            logger.debug("Creating ChannelType for OBIS {}", value.getObisCode());
+            obisChannelMap.put(value.getObisCode(), getChannelType(value.getUnit(), value.getObisCode()));
+        }
+    }
+
+    private ChannelType getChannelType(Unit<?> unit, String obis) {
+        String obisChannelId = SmartMeterBindingConstants.getObisChannelId(obis);
+        StateChannelTypeBuilder stateDescriptionBuilder;
+        if (unit != null) {
+            String dimension = UnitUtils.getDimensionName(unit);
+            stateDescriptionBuilder = ChannelTypeBuilder
+                    .state(new ChannelTypeUID(SmartMeterBindingConstants.BINDING_ID, obisChannelId), obis,
+                            CoreItemFactory.NUMBER + ":" + dimension)
+                    .withStateDescription(StateDescriptionFragmentBuilder.create().withReadOnly(true)
+                            .withPattern("%.2f %unit%").build().toStateDescription())
+                    .withConfigDescriptionURI(URI.create(SmartMeterBindingConstants.CHANNEL_TYPE_METERREADER_OBIS));
+        } else {
+            stateDescriptionBuilder = ChannelTypeBuilder
+                    .state(new ChannelTypeUID(SmartMeterBindingConstants.BINDING_ID, obisChannelId), obis,
+                            CoreItemFactory.STRING)
+                    .withStateDescription(
+                            StateDescriptionFragmentBuilder.create().withReadOnly(true).build().toStateDescription());
+
+        }
+        return stateDescriptionBuilder.build();
+    }
+
+    @Override
+    public <Q extends @NonNull Quantity<Q>> void valueRemoved(MeterValue<Q> value) {
+        obisChannelMap.remove(value.getObisCode());
+    }
+
+    /**
+     * Gets the {@link ChannelTypeUID} for the given OBIS code.
+     *
+     * @param obis The obis code.
+     * @return The {@link ChannelTypeUID} or null.
+     */
+    public ChannelTypeUID getChannelTypeIdForObis(String obis) {
+        return obisChannelMap.get(obis).getUID();
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/SmartMeterConfigProvider.java

@@ -0,0 +1,80 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Locale;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.SmartMeterBindingConstants;
+import org.openhab.binding.smartmeter.internal.conformity.Conformity;
+import org.openhab.binding.smartmeter.internal.helper.Baudrate;
+import org.openhab.binding.smartmeter.internal.helper.ProtocolMode;
+import org.openhab.core.config.core.ConfigOptionProvider;
+import org.openhab.core.config.core.ParameterOption;
+import org.osgi.service.component.annotations.Component;
+
+/**
+ * Provides the configuration options for a meter device.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@Component(service = ConfigOptionProvider.class)
+@NonNullByDefault
+public class SmartMeterConfigProvider implements ConfigOptionProvider {
+
+    @Override
+    public @Nullable Collection<ParameterOption> getParameterOptions(URI uri, String param, @Nullable Locale locale) {
+        return getParameterOptions(uri, param, null, locale);
+    }
+
+    @Override
+    public @Nullable Collection<ParameterOption> getParameterOptions(URI uri, String param, @Nullable String context,
+            @Nullable Locale locale) {
+        if (!SmartMeterBindingConstants.THING_TYPE_SMLREADER.getAsString().equals(uri.getSchemeSpecificPart())) {
+            return null;
+        }
+
+        switch (param) {
+            case SmartMeterBindingConstants.CONFIGURATION_SERIAL_MODE:
+                List<ParameterOption> options = new ArrayList<>();
+
+                for (ProtocolMode mode : ProtocolMode.values()) {
+                    options.add(new ParameterOption(mode.name(), mode.toString()));
+                }
+                return options;
+
+            case SmartMeterBindingConstants.CONFIGURATION_BAUDRATE:
+                options = new ArrayList<>();
+
+                for (Baudrate baudrate : Baudrate.values()) {
+                    options.add(new ParameterOption(baudrate.getBaudrate() + "", baudrate.toString()));
+                }
+                return options;
+
+            case SmartMeterBindingConstants.CONFIGURATION_CONFORMITY:
+                options = new ArrayList<>();
+
+                for (Conformity conformity : Conformity.values()) {
+                    options.add(new ParameterOption(conformity.name(), conformity.toString()));
+                }
+                return options;
+        }
+        return null;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/SmartMeterHandler.java

@@ -0,0 +1,291 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal;
+
+import java.math.BigDecimal;
+import java.text.MessageFormat;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Supplier;
+
+import javax.measure.Quantity;
+import javax.measure.Unit;
+
+import org.apache.commons.lang.StringUtils;
+import org.eclipse.jdt.annotation.DefaultLocation;
+import org.eclipse.jdt.annotation.NonNull;
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.SmartMeterBindingConstants;
+import org.openhab.binding.smartmeter.SmartMeterConfiguration;
+import org.openhab.binding.smartmeter.internal.conformity.Conformity;
+import org.openhab.binding.smartmeter.internal.helper.Baudrate;
+import org.openhab.core.config.core.Configuration;
+import org.openhab.core.io.transport.serial.SerialPortManager;
+import org.openhab.core.library.types.QuantityType;
+import org.openhab.core.library.types.StringType;
+import org.openhab.core.thing.Channel;
+import org.openhab.core.thing.ChannelUID;
+import org.openhab.core.thing.Thing;
+import org.openhab.core.thing.ThingStatus;
+import org.openhab.core.thing.ThingStatusDetail;
+import org.openhab.core.thing.binding.BaseThingHandler;
+import org.openhab.core.thing.binding.builder.ChannelBuilder;
+import org.openhab.core.thing.binding.builder.ThingBuilder;
+import org.openhab.core.thing.type.ChannelType;
+import org.openhab.core.thing.type.ChannelTypeUID;
+import org.openhab.core.types.Command;
+import org.openhab.core.types.RefreshType;
+import org.openhab.core.types.State;
+import org.openhab.core.types.TypeParser;
+import org.openhab.core.util.HexUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import io.reactivex.disposables.Disposable;
+
+/**
+ * The {@link SmartMeterHandler} is responsible for handling commands, which are
+ * sent to one of the channels.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ */
+@NonNullByDefault({ DefaultLocation.ARRAY_CONTENTS, DefaultLocation.PARAMETER, DefaultLocation.RETURN_TYPE,
+        DefaultLocation.TYPE_ARGUMENT })
+public class SmartMeterHandler extends BaseThingHandler {
+
+    private static final long DEFAULT_TIMEOUT = 30000;
+    private static final int DEFAULT_REFRESH_PERIOD = 30;
+    private Logger logger = LoggerFactory.getLogger(SmartMeterHandler.class);
+    private MeterDevice<?> smlDevice;
+    private Disposable valueReader;
+    private Conformity conformity;
+    private MeterValueListener valueChangeListener;
+    private SmartMeterChannelTypeProvider channelTypeProvider;
+    private @NonNull Supplier<SerialPortManager> serialPortManagerSupplier;
+
+    public SmartMeterHandler(Thing thing, SmartMeterChannelTypeProvider channelProvider,
+            Supplier<SerialPortManager> serialPortManagerSupplier) {
+        super(thing);
+        Objects.requireNonNull(channelProvider, "SmartMeterChannelTypeProvider must not be null");
+        this.channelTypeProvider = channelProvider;
+        this.serialPortManagerSupplier = serialPortManagerSupplier;
+    }
+
+    @Override
+    public void initialize() {
+        logger.debug("Initializing Smartmeter handler.");
+        cancelRead();
+
+        SmartMeterConfiguration config = getConfigAs(SmartMeterConfiguration.class);
+        logger.debug("config port = {}", config.port);
+
+        boolean validConfig = true;
+        String errorMsg = null;
+
+        if (StringUtils.trimToNull(config.port) == null) {
+            errorMsg = "Parameter 'port' is mandatory and must be configured";
+            validConfig = false;
+        }
+
+        if (validConfig) {
+            byte[] pullSequence = config.initMessage == null ? null
+                    : HexUtils.hexToBytes(StringUtils.deleteWhitespace(config.initMessage));
+            int baudrate = config.baudrate == null ? Baudrate.AUTO.getBaudrate()
+                    : Baudrate.fromString(config.baudrate).getBaudrate();
+            this.conformity = config.conformity == null ? Conformity.NONE : Conformity.valueOf(config.conformity);
+            this.smlDevice = MeterDeviceFactory.getDevice(serialPortManagerSupplier, config.mode,
+                    this.thing.getUID().getAsString(), config.port, pullSequence, baudrate, config.baudrateChangeDelay);
+            updateStatus(ThingStatus.UNKNOWN, ThingStatusDetail.HANDLER_CONFIGURATION_PENDING,
+                    "Waiting for messages from device");
+
+            smlDevice.addValueChangeListener(channelTypeProvider);
+
+            updateOBISValue();
+        } else {
+            updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, errorMsg);
+        }
+    }
+
+    @Override
+    public void dispose() {
+        super.dispose();
+        cancelRead();
+        if (this.valueChangeListener != null) {
+            this.smlDevice.removeValueChangeListener(valueChangeListener);
+        }
+        if (this.channelTypeProvider != null) {
+            this.smlDevice.removeValueChangeListener(channelTypeProvider);
+        }
+    }
+
+    private void cancelRead() {
+        if (this.valueReader != null) {
+            this.valueReader.dispose();
+        }
+    }
+
+    @Override
+    public void handleCommand(ChannelUID channelUID, Command command) {
+        if (command instanceof RefreshType) {
+            updateOBISChannel(channelUID);
+        } else {
+            logger.debug("The SML reader binding is read-only and can not handle command {}", command);
+        }
+    }
+
+    /**
+     * Get new data the device
+     *
+     */
+    private void updateOBISValue() {
+        cancelRead();
+
+        valueChangeListener = new MeterValueListener() {
+            @Override
+            public <Q extends @NonNull Quantity<Q>> void valueChanged(MeterValue<Q> value) {
+                ThingBuilder thingBuilder = editThing();
+
+                String obis = value.getObisCode();
+
+                String obisChannelString = SmartMeterBindingConstants.getObisChannelId(obis);
+                Channel channel = thing.getChannel(obisChannelString);
+                ChannelTypeUID channelTypeId = channelTypeProvider.getChannelTypeIdForObis(obis);
+
+                ChannelType channelType = channelTypeProvider.getChannelType(channelTypeId, null);
+                if (channelType != null) {
+                    String itemType = channelType.getItemType();
+
+                    State state = getStateForObisValue(value, channel);
+                    if (channel == null) {
+                        logger.debug("Adding channel: {} with item type: {}", obisChannelString, itemType);
+
+                        // channel has not been created yet
+                        ChannelBuilder channelBuilder = ChannelBuilder
+                                .create(new ChannelUID(thing.getUID(), obisChannelString), itemType)
+                                .withType(channelTypeId);
+
+                        Configuration configuration = new Configuration();
+                        configuration.put(SmartMeterBindingConstants.CONFIGURATION_CONVERSION, 1);
+                        channelBuilder.withConfiguration(configuration);
+                        channelBuilder.withLabel(obis);
+                        Map<String, String> channelProps = new HashMap<>();
+                        channelProps.put(SmartMeterBindingConstants.CHANNEL_PROPERTY_OBIS, obis);
+                        channelBuilder.withProperties(channelProps);
+                        channelBuilder.withDescription(
+                                MessageFormat.format("Value for OBIS code: {0} with Unit: {1}", obis, value.getUnit()));
+                        channel = channelBuilder.build();
+                        ChannelUID channelId = channel.getUID();
+
+                        // add all valid channels to the thing builder
+                        List<Channel> channels = new ArrayList<>(getThing().getChannels());
+                        if (channels.stream().filter((element) -> element.getUID().equals(channelId)).count() == 0) {
+                            channels.add(channel);
+                            thingBuilder.withChannels(channels);
+                            updateThing(thingBuilder.build());
+                        }
+                    }
+
+                    if (!channel.getProperties().containsKey(SmartMeterBindingConstants.CHANNEL_PROPERTY_OBIS)) {
+                        addObisPropertyToChannel(obis, channel);
+                    }
+                    updateState(channel.getUID(), state);
+
+                    updateStatus(ThingStatus.ONLINE, ThingStatusDetail.NONE);
+                } else {
+                    logger.warn("No ChannelType found for OBIS {}", obis);
+                }
+            }
+
+            private void addObisPropertyToChannel(String obis, Channel channel) {
+                String description = channel.getDescription();
+                String label = channel.getLabel();
+                ChannelBuilder newChannel = ChannelBuilder.create(channel.getUID(), channel.getAcceptedItemType())
+                        .withDefaultTags(channel.getDefaultTags()).withConfiguration(channel.getConfiguration())
+                        .withDescription(description == null ? "" : description).withKind(channel.getKind())
+                        .withLabel(label == null ? "" : label).withType(channel.getChannelTypeUID());
+                Map<String, String> properties = new HashMap<>(channel.getProperties());
+                properties.put(SmartMeterBindingConstants.CHANNEL_PROPERTY_OBIS, obis);
+                newChannel.withProperties(properties);
+                updateThing(editThing().withoutChannel(channel.getUID()).withChannel(newChannel.build()).build());
+            }
+
+            @Override
+            public <Q extends @NonNull Quantity<Q>> void valueRemoved(MeterValue<Q> value) {
+                // channels that are not available are removed
+                String obisChannelId = SmartMeterBindingConstants.getObisChannelId(value.getObisCode());
+                logger.debug("Removing channel: {}", obisChannelId);
+                ThingBuilder thingBuilder = editThing();
+                thingBuilder.withoutChannel(new ChannelUID(thing.getUID(), obisChannelId));
+                updateThing(thingBuilder.build());
+            }
+
+            @Override
+            public void errorOccurred(Throwable e) {
+                updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getLocalizedMessage());
+            }
+        };
+        this.smlDevice.addValueChangeListener(valueChangeListener);
+
+        SmartMeterConfiguration config = getConfigAs(SmartMeterConfiguration.class);
+        int delay = config.refresh != null ? config.refresh : DEFAULT_REFRESH_PERIOD;
+        valueReader = this.smlDevice.readValues(DEFAULT_TIMEOUT, this.scheduler, Duration.ofSeconds(delay));
+    }
+
+    private void updateOBISChannel(ChannelUID channelId) {
+        if (isLinked(channelId.getId())) {
+            Channel channel = this.thing.getChannel(channelId.getId());
+            if (channel != null) {
+                String obis = channel.getProperties().get(SmartMeterBindingConstants.CHANNEL_PROPERTY_OBIS);
+                MeterValue<?> value = this.smlDevice.getMeterValue(obis);
+                if (value != null) {
+                    State state = getStateForObisValue(value, channel);
+                    updateState(channel.getUID(), state);
+                }
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private <Q extends Quantity<Q>> State getStateForObisValue(MeterValue<?> value, @Nullable Channel channel) {
+        Unit<?> unit = value.getUnit();
+        String valueString = value.getValue();
+        if (unit != null) {
+            valueString += " " + value.getUnit();
+        }
+        State state = TypeParser.parseState(Arrays.asList(QuantityType.class, StringType.class), valueString);
+        if (channel != null && state instanceof QuantityType) {
+            state = applyConformity(channel, (QuantityType<Q>) state);
+            Number conversionRatio = (Number) channel.getConfiguration()
+                    .get(SmartMeterBindingConstants.CONFIGURATION_CONVERSION);
+            if (conversionRatio != null) {
+                state = ((QuantityType<?>) state).divide(BigDecimal.valueOf(conversionRatio.doubleValue()));
+            }
+        }
+        return state;
+    }
+
+    private <Q extends Quantity<Q>> State applyConformity(Channel channel, QuantityType<Q> currentState) {
+        try {
+            return this.conformity.apply(channel, currentState, getThing(), this.smlDevice);
+        } catch (Exception e) {
+            logger.warn("Failed to apply negation for channel: {}", channel.getUID(), e);
+        }
+        return currentState;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/SmartMeterHandlerFactory.java

@@ -0,0 +1,80 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal;
+
+import static org.openhab.binding.smartmeter.SmartMeterBindingConstants.THING_TYPE_SMLREADER;
+
+import java.util.Collections;
+import java.util.Set;
+import java.util.function.Supplier;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.core.io.transport.serial.SerialPortManager;
+import org.openhab.core.thing.Thing;
+import org.openhab.core.thing.ThingTypeUID;
+import org.openhab.core.thing.binding.BaseThingHandlerFactory;
+import org.openhab.core.thing.binding.ThingHandler;
+import org.openhab.core.thing.binding.ThingHandlerFactory;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.ConfigurationPolicy;
+import org.osgi.service.component.annotations.Reference;
+
+/**
+ * The {@link SmartMeterHandlerFactory} is responsible for creating things and thing
+ * handlers.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ */
+@Component(service = ThingHandlerFactory.class, configurationPolicy = ConfigurationPolicy.OPTIONAL)
+@NonNullByDefault
+public class SmartMeterHandlerFactory extends BaseThingHandlerFactory {
+
+    private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Collections.singleton(THING_TYPE_SMLREADER);
+    private @NonNullByDefault({}) SmartMeterChannelTypeProvider channelProvider;
+    private @NonNullByDefault({}) Supplier<SerialPortManager> serialPortManagerSupplier = () -> null;
+
+    @Override
+    public boolean supportsThingType(ThingTypeUID thingTypeUID) {
+        return SUPPORTED_THING_TYPES_UIDS.contains(thingTypeUID);
+    }
+
+    @Reference
+    protected void setSmartMeterChannelTypeProvider(SmartMeterChannelTypeProvider provider) {
+        this.channelProvider = provider;
+    }
+
+    protected void unsetSmartMeterChannelTypeProvider(SmartMeterChannelTypeProvider provider) {
+        this.channelProvider = null;
+    }
+
+    @Reference
+    protected void setSerialPortManager(SerialPortManager serialPortManager) {
+        serialPortManagerSupplier = () -> serialPortManager;
+    }
+
+    protected void unsetSerialPortManager(SerialPortManager serialPortManager) {
+        this.serialPortManagerSupplier = () -> null;
+    }
+
+    @Override
+    protected @Nullable ThingHandler createHandler(Thing thing) {
+        ThingTypeUID thingTypeUID = thing.getThingTypeUID();
+
+        if (thingTypeUID.equals(THING_TYPE_SMLREADER)) {
+            return new SmartMeterHandler(thing, channelProvider, serialPortManagerSupplier);
+        }
+
+        return null;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/conformity/Conformity.java

@@ -0,0 +1,164 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.conformity;
+
+import java.util.function.Supplier;
+
+import javax.measure.Quantity;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.SmartMeterBindingConstants;
+import org.openhab.binding.smartmeter.internal.MeterDevice;
+import org.openhab.binding.smartmeter.internal.MeterValue;
+import org.openhab.binding.smartmeter.internal.ObisCode;
+import org.openhab.binding.smartmeter.internal.conformity.negate.NegateHandler;
+import org.openhab.core.library.types.QuantityType;
+import org.openhab.core.library.unit.SmartHomeUnits;
+import org.openhab.core.thing.Channel;
+import org.openhab.core.thing.Thing;
+import org.openhab.core.types.State;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Some meters have specific semantics on how to interpret the values which are sent from the meter.
+ * This class handles all such known special cases.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public enum Conformity {
+
+    NONE {
+        @Override
+        public <Q extends Quantity<Q>> State apply(Channel channel, QuantityType<Q> currentState, Thing thing,
+                MeterDevice<?> device) {
+            return retrieveOverwrittenNegate(channel, currentState, thing, device, null);
+        }
+    },
+    /**
+     * See
+     * https://www.vde.com/resource/blob/951000/252eb3cdf1c7f6cdea10847be399da0d/fnn-lastenheft-edl-1-0-2010-01-13-data.pdf
+     */
+    EDL_FNN {
+        /*
+         * (non-Javadoc)
+         *
+         * @see org.openhab.binding.smartmeter.internal.Conformity#apply(org.openhab.core.thing.Channel,
+         * org.openhab.core.library.types.QuantityType, org.openhab.core.thing.Thing,
+         * org.openhab.binding.smartmeter.internal.MeterDevice)
+         */
+        @Override
+        public <Q extends Quantity<Q>> QuantityType<?> apply(Channel channel, QuantityType<Q> currentState, Thing thing,
+                MeterDevice<?> device) {
+            return retrieveOverwrittenNegate(channel, currentState, thing, device, () -> {
+                // Negate if this channel has the unit "Watt" and the negate bit is set. Read from all other
+                // channels the state and check if there is a negate bit.
+                String channelObis = channel.getProperties().get(SmartMeterBindingConstants.CHANNEL_PROPERTY_OBIS);
+                MeterValue<?> value = device.getMeterValue(channelObis);
+                if (value != null && SmartHomeUnits.WATT.isCompatible(value.getUnit())) {
+                    for (String obis : device.getObisCodes()) {
+                        try {
+                            MeterValue<?> otherValue = device.getMeterValue(obis);
+                            ObisCode obisCode = ObisCode.from(obis);
+                            if (otherValue != null) {
+                                if (obisCode.matches((byte) 0x60, (byte) 0x05, (byte) 0x05)) {
+                                    // we found status status obis 96.5.5
+                                    if (NegateHandler.isNegateSet(otherValue.getValue(), 5)) {
+                                        return currentState.negate();
+                                    }
+                                } else if (obisCode.matches((byte) 0x01, (byte) 0x08, (byte) 0x00)) {
+                                    // check obis 1.8.0 for status if status has negate bit set.
+                                    String status = otherValue.getStatus();
+                                    if (status != null && NegateHandler.isNegateSet(status, 5)) {
+                                        return currentState.negate();
+                                    }
+                                }
+                            }
+                        } catch (Exception e) {
+                            logger.warn("Failed to check negate status for obis {}", obis, e);
+                        }
+                    }
+                }
+                return currentState;
+            });
+        }
+    };
+
+    private static final Logger logger = LoggerFactory.getLogger(Conformity.class);
+
+    /**
+     * Applies the overwritten negation setting for the channel.
+     *
+     * @param currentState The current value.
+     * @param thing The {@link Thing}
+     * @param device The {@link MeterDevice}.
+     * @param negateProperty The negate property.
+     * @return The negated value.
+     */
+    private static <Q extends Quantity<Q>> QuantityType<Q> applyNegation(QuantityType<Q> currentState, Thing thing,
+            MeterDevice<?> device, String negateProperty) {
+        boolean shouldNegateState = NegateHandler.shouldNegateState(negateProperty, channelId -> {
+            Channel negateChannel = thing.getChannel(channelId);
+            if (negateChannel != null) {
+                return device.getMeterValue(
+                        negateChannel.getProperties().get(SmartMeterBindingConstants.CHANNEL_PROPERTY_OBIS));
+            }
+            return null;
+        });
+
+        if (shouldNegateState) {
+            return currentState.negate();
+        }
+        return currentState;
+    }
+
+    /**
+     *
+     * @param channel
+     * @param currentState
+     * @param thing
+     * @param device
+     * @param elseDo If negate property was not overwritten call the given supplier.
+     * @return
+     */
+    protected <Q extends Quantity<Q>> QuantityType<?> retrieveOverwrittenNegate(Channel channel,
+            QuantityType<Q> currentState, Thing thing, MeterDevice<?> device,
+            @Nullable Supplier<QuantityType<Q>> elseDo) {
+        // Negate setting
+        String negateProperty = (String) channel.getConfiguration()
+                .get(SmartMeterBindingConstants.CONFIGURATION_CHANNEL_NEGATE);
+        if (negateProperty != null && !negateProperty.trim().isEmpty()) {
+            return applyNegation(currentState, thing, device, negateProperty);
+        } else {
+            if (elseDo != null) {
+                return elseDo.get();
+            }
+            return currentState;
+        }
+    }
+
+    /**
+     * Applies any changes according to the conformity and returns the new value.
+     *
+     * @param channel The {@link Channel} for which the conformity should be applied to.
+     * @param currentState The current state of that {@link Channel}
+     * @param thing The {@link Thing} where the channel belongs to.
+     * @param device The {@link MeterDevice} for the Thing.
+     * @return The applied state.
+     */
+    public abstract <Q extends Quantity<Q>> State apply(Channel channel, QuantityType<Q> currentState, Thing thing,
+            MeterDevice<?> device);
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/conformity/negate/NegateBitModel.java

@@ -0,0 +1,96 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.conformity.negate;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+
+/**
+ * Models the negate bit - namely the OBIS code, whether its in the status bytes and on which position (of the status)
+ * it is encoded.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public class NegateBitModel {
+
+    private int negatePosition;
+    private boolean negateBit;
+    private String negateObis;
+    private boolean status;
+
+    /**
+     *
+     * @param negatePosition
+     * @param negateBit
+     * @param negateObis
+     * @param status Whether to get the negate bit from status value or from actual value.
+     */
+    public NegateBitModel(int negatePosition, boolean negateBit, String negateObis, boolean status) {
+        this.negatePosition = negatePosition;
+        this.negateBit = negateBit;
+        this.negateObis = negateObis;
+        this.status = status;
+    }
+
+    public int getNegatePosition() {
+        return negatePosition;
+    }
+
+    public boolean isNegateBit() {
+        return negateBit;
+    }
+
+    public String getNegateChannelId() {
+        return negateObis;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + (negateBit ? 1231 : 1237);
+        result = prime * result + (negateObis.hashCode());
+        result = prime * result + negatePosition;
+        return result;
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        NegateBitModel other = (NegateBitModel) obj;
+        if (negateBit != other.negateBit) {
+            return false;
+        }
+        if (!negateObis.equals(other.negateObis)) {
+            return false;
+        }
+        if (negatePosition != other.negatePosition) {
+            return false;
+        }
+        return true;
+    }
+
+    public boolean isStatus() {
+        return status;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/conformity/negate/NegateBitParser.java

@@ -0,0 +1,55 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.conformity.negate;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.openhab.binding.smartmeter.SmartMeterBindingConstants;
+
+/**
+ * Parses the NegateBit property.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public class NegateBitParser {
+
+    /**
+     * Parsing of negate bit property. This is in the format: {@literal <OBIS>:<POSITION>:<BIT_SET>"}
+     * e.g. "1-0:1-8-0:5:1"
+     *
+     * @param negateProperty
+     * @return The parsed model
+     */
+    public static NegateBitModel parseNegateProperty(String negateProperty) throws IllegalArgumentException {
+        Pattern obisPattern = Pattern.compile(SmartMeterBindingConstants.OBIS_PATTERN_CHANNELID);
+        try {
+            Matcher matcher = obisPattern.matcher(negateProperty);
+            if (matcher.find()) {
+                String obis = matcher.group();
+                String substring = negateProperty.substring(matcher.end() + 1, negateProperty.length());
+                String[] split = substring.split(":");
+                int negatePosition = Integer.parseInt(split[0]);
+                boolean negateBit = Integer.parseInt(split[1]) == 0 ? false : true;
+                boolean status = split.length > 2 ? split[2].equalsIgnoreCase("status") : false;
+                return new NegateBitModel((byte) negatePosition, negateBit, obis, status);
+            }
+        } catch (Exception e) {
+            throw new IllegalArgumentException("Negate property cannot be parsed: " + negateProperty, e);
+        }
+        throw new IllegalArgumentException("Negate property cannot be parsed: " + negateProperty);
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/conformity/negate/NegateHandler.java

@@ -0,0 +1,70 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.conformity.negate;
+
+import java.util.function.Function;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.internal.MeterValue;
+
+/**
+ * Handles the Negate Bit property for a specific meter value.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public class NegateHandler {
+
+    /**
+     * Gets whether negation should be applied for the given <code>negateProperty</code> and the {@link MeterValue}
+     * provided by the <code>getObisValueFunction</code>
+     *
+     * @param negateProperty The negate property (in form <OBIS>:<POSITION>:<BIT_SET>)
+     * @param getObisValueFunction The function to get the {@link MeterValue} from an OBIS code.
+     * @return whether to negate or not.
+     */
+    public static boolean shouldNegateState(String negateProperty,
+            Function<String, @Nullable MeterValue<?>> getObisValueFunction) {
+        NegateBitModel negateModel = NegateBitParser.parseNegateProperty(negateProperty);
+        MeterValue<?> value = getObisValueFunction.apply(negateModel.getNegateChannelId());
+        boolean isStatus = negateModel.isStatus();
+        if (value != null) {
+            String status = value.getStatus();
+            String stringValue;
+            if (isStatus && status != null) {
+                stringValue = status;
+            } else {
+                stringValue = value.getValue();
+            }
+            boolean negateBit = isNegateSet(stringValue, negateModel.getNegatePosition());
+
+            return negateBit == negateModel.isNegateBit();
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Gets whether the bit at position <code>negatePosition</code> is set or not.
+     *
+     * @param value The value which must be a number to check the bit
+     * @param negatePosition The position to check
+     * @return Whether the given bit is set or not
+     */
+    public static boolean isNegateSet(String value, int negatePosition) {
+        long longValue = Long.parseLong(value);
+        return (longValue & (1L << negatePosition)) != 0;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/helper/Baudrate.java

@@ -0,0 +1,74 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.helper;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+
+/**
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public enum Baudrate {
+    AUTO(-1) {
+        @Override
+        public String toString() {
+            return name();
+        }
+    },
+    _300(300),
+    _600(600),
+    _1200(1200),
+    _1800(1800),
+    _2400(2400),
+    _4800(4800),
+    _9600(9600),
+    _19200(19200),
+    _38400(38400);
+
+    private int baudrate;
+
+    private Baudrate(int baudrate) {
+        this.baudrate = baudrate;
+    }
+
+    public int getBaudrate() {
+        return baudrate;
+    }
+
+    public static Baudrate fromBaudrate(int baudrate) {
+        for (Baudrate baud : values()) {
+            if (baud.getBaudrate() == baudrate) {
+                return baud;
+            }
+        }
+        return Baudrate._9600;
+    }
+
+    public static Baudrate fromString(String baudrate) {
+        try {
+            if (baudrate.equalsIgnoreCase(AUTO.name())) {
+                return Baudrate.AUTO;
+            }
+            return valueOf("_" + baudrate.toUpperCase());
+        } catch (Exception e) {
+            return Baudrate.AUTO;
+        }
+    }
+
+    @Override
+    public String toString() {
+        return getBaudrate() + "bd";
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/helper/ProtocolMode.java

@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.helper;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+
+/**
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public enum ProtocolMode {
+
+    ABC("A,B,C"),
+    D("D"),
+    SML("SML");
+
+    private String label;
+
+    private <T> ProtocolMode(String label) {
+        this.label = label;
+    }
+
+    @Override
+    public String toString() {
+        return label;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/helper/SerialParameter.java

@@ -0,0 +1,74 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.helper;
+
+import org.apache.commons.lang.StringUtils;
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.openhab.core.io.transport.serial.SerialPort;
+
+/**
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public enum SerialParameter {
+
+    _8N1(SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE),
+    _7N1(SerialPort.DATABITS_7, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE),
+    _7O1(SerialPort.DATABITS_7, SerialPort.STOPBITS_1, SerialPort.PARITY_ODD),
+    _7E1(SerialPort.DATABITS_7, SerialPort.STOPBITS_1, SerialPort.PARITY_EVEN);
+
+    private int databits;
+    private int stopbits;
+    private int parity;
+
+    private SerialParameter(int databits, int stopbits, int parity) {
+        this.databits = databits;
+        this.stopbits = stopbits;
+        this.parity = parity;
+    }
+
+    public int getDatabits() {
+        return this.databits;
+    }
+
+    public int getStopbits() {
+        return stopbits;
+    }
+
+    public int getParity() {
+        return parity;
+    }
+
+    @Override
+    public String toString() {
+        return name().substring(1);
+    }
+
+    /**
+     * Returns the enum constant for the serial parameter string.
+     * The parameters must be in format 'StartbitsParityStopbits'
+     * e.g. '7N1', '8N1'
+     *
+     * @param params
+     * @return The found {@link SerialParameter} or {@link SerialParameter#_8N1} if not found
+     */
+    public static SerialParameter fromString(String params) {
+        try {
+            return valueOf("_" + StringUtils.upperCase(params));
+        } catch (IllegalArgumentException e) {
+            return SerialParameter._8N1;
+        }
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/iec62056/Iec62056_21MeterReader.java

@@ -0,0 +1,63 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.iec62056;
+
+import java.util.function.Supplier;
+
+import javax.measure.Quantity;
+
+import org.eclipse.jdt.annotation.NonNull;
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.connectors.IMeterReaderConnector;
+import org.openhab.binding.smartmeter.internal.MeterDevice;
+import org.openhab.binding.smartmeter.internal.MeterValue;
+import org.openhab.binding.smartmeter.internal.helper.ProtocolMode;
+import org.openhab.core.io.transport.serial.SerialPortManager;
+import org.openmuc.j62056.DataMessage;
+import org.openmuc.j62056.DataSet;
+
+/**
+ * Reads meter values from an IEC 62056-21 compatible device with mode A,B,C or D.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public class Iec62056_21MeterReader extends MeterDevice<DataMessage> {
+
+    public Iec62056_21MeterReader(Supplier<SerialPortManager> serialPortManagerSupplier, String deviceId,
+            String serialPort, byte @Nullable [] initMessage, int baudrate, int baudrateChangeDelay,
+            ProtocolMode protocolMode) {
+        super(serialPortManagerSupplier, deviceId, serialPort, initMessage, baudrate, baudrateChangeDelay,
+                protocolMode);
+    }
+
+    @Override
+    protected IMeterReaderConnector<DataMessage> createConnector(Supplier<SerialPortManager> serialPortManagerSupplier,
+            String serialPort, int baudrate, int baudrateChangeDelay, ProtocolMode protocolMode) {
+        return new Iec62056_21SerialConnector(serialPortManagerSupplier, serialPort, baudrate, baudrateChangeDelay,
+                protocolMode);
+    }
+
+    @Override
+    protected <Q extends @NonNull Quantity<Q>> void populateValueCache(DataMessage smlFile) {
+        for (DataSet dataSet : smlFile.getDataSets()) {
+            String address = dataSet.getAddress();
+            if (address != null && !address.isEmpty()) {
+                addObisCache(new MeterValue<Q>(address, dataSet.getValue(),
+                        Iec62056_21UnitConversion.getUnit(dataSet.getUnit())));
+            }
+        }
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/iec62056/Iec62056_21SerialConnector.java

@@ -0,0 +1,135 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.iec62056;
+
+import java.io.IOException;
+import java.time.Duration;
+import java.util.function.Supplier;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.connectors.ConnectorBase;
+import org.openhab.binding.smartmeter.internal.helper.Baudrate;
+import org.openhab.binding.smartmeter.internal.helper.ProtocolMode;
+import org.openhab.core.io.transport.serial.SerialPortManager;
+import org.openmuc.j62056.DataMessage;
+import org.openmuc.j62056.Iec21Port;
+import org.openmuc.j62056.Iec21Port.Builder;
+import org.openmuc.j62056.ModeDListener;
+import org.reactivestreams.Publisher;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import io.reactivex.Flowable;
+import io.reactivex.FlowableEmitter;
+
+/**
+ * This connector reads meter values with IEC62056-21 protocol.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public class Iec62056_21SerialConnector extends ConnectorBase<DataMessage> {
+
+    private final Logger logger = LoggerFactory.getLogger(Iec62056_21SerialConnector.class);
+    private int baudrate;
+    private int baudrateChangeDelay;
+    private ProtocolMode protocolMode;
+    @Nullable
+    private Iec21Port iec21Port;
+
+    public Iec62056_21SerialConnector(Supplier<SerialPortManager> serialPortManagerSupplier, String portName,
+            int baudrate, int baudrateChangeDelay, ProtocolMode protocolMode) {
+        super(portName);
+        this.baudrate = baudrate;
+        this.baudrateChangeDelay = baudrateChangeDelay;
+        this.protocolMode = protocolMode;
+    }
+
+    @Override
+    protected boolean applyPeriod() {
+        return protocolMode != ProtocolMode.D;
+    }
+
+    @Override
+    protected boolean applyRetryHandling() {
+        return protocolMode != ProtocolMode.D;
+    }
+
+    @Override
+    protected Publisher<?> getRetryPublisher(Duration period, Publisher<Throwable> attempts) {
+        if (protocolMode == ProtocolMode.D) {
+            return Flowable.empty();
+        } else {
+            return super.getRetryPublisher(period, attempts);
+        }
+    }
+
+    @Override
+    protected DataMessage readNext(byte @Nullable [] initMessage) throws IOException {
+        if (iec21Port != null) {
+            DataMessage dataMessage = iec21Port.read();
+            logger.debug("Datamessage read: {}", dataMessage);
+            return dataMessage;
+        }
+        throw new IOException("SerialPort was not yet created!");
+    }
+
+    @Override
+    protected void emitValues(byte @Nullable [] initMessage, FlowableEmitter<@Nullable DataMessage> emitter)
+            throws IOException {
+        switch (protocolMode) {
+            case ABC:
+                super.emitValues(initMessage, emitter);
+                break;
+            case D:
+                if (iec21Port != null) {
+                    iec21Port.listen(new ModeDListener() {
+
+                        @Override
+                        public void newDataMessage(@Nullable DataMessage dataMessage) {
+                            logger.debug("Datamessage read: {}", dataMessage);
+                            emitter.onNext(dataMessage);
+                        }
+
+                        @Override
+                        public void exceptionWhileListening(@Nullable Exception e) {
+                            logger.warn("Exception while listening for mode D data message", e);
+                        }
+                    });
+                }
+                break;
+            case SML:
+                throw new IOException("SML mode not supported");
+        }
+    }
+
+    @Override
+    public void openConnection() throws IOException {
+        Builder iec21Builder = new Iec21Port.Builder(getPortName());
+        if (Baudrate.fromBaudrate(this.baudrate) != Baudrate.AUTO) {
+            iec21Builder.setInitialBaudrate(this.baudrate);
+        }
+        iec21Builder.setBaudRateChangeDelay(baudrateChangeDelay);
+        iec21Builder.enableVerboseMode(true);
+        iec21Port = iec21Builder.buildAndOpen();
+    }
+
+    @Override
+    public void closeConnection() {
+        if (iec21Port != null) {
+            iec21Port.close();
+        }
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/iec62056/Iec62056_21UnitConversion.java

@@ -0,0 +1,47 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.iec62056;
+
+import javax.measure.Quantity;
+import javax.measure.Unit;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.core.types.util.UnitUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Converts a unit from IEC62056-21 protocol to a {@link Unit}
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public class Iec62056_21UnitConversion {
+
+    private static final Logger logger = LoggerFactory.getLogger(Iec62056_21UnitConversion.class);
+
+    @SuppressWarnings("unchecked")
+    public static @Nullable <Q extends Quantity<Q>> Unit<Q> getUnit(String unit) {
+        if (!unit.isEmpty()) {
+            try {
+                return (Unit<Q>) UnitUtils.parseUnit(" " + unit);
+            } catch (Exception e) {
+                logger.warn("Failed to parse unit {}: {}", unit, e.getMessage());
+                return null;
+            }
+        }
+        return null;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/sml/SmlFileDebugOutput.java

@@ -0,0 +1,181 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.sml;
+
+import java.util.List;
+import java.util.function.Consumer;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.openmuc.jsml.structures.EMessageBody;
+import org.openmuc.jsml.structures.SmlFile;
+import org.openmuc.jsml.structures.SmlMessage;
+import org.openmuc.jsml.structures.responses.SmlAttentionRes;
+import org.openmuc.jsml.structures.responses.SmlGetListRes;
+import org.openmuc.jsml.structures.responses.SmlGetProcParameterRes;
+import org.openmuc.jsml.structures.responses.SmlGetProfileListRes;
+import org.openmuc.jsml.structures.responses.SmlGetProfilePackRes;
+import org.openmuc.jsml.structures.responses.SmlPublicCloseRes;
+import org.openmuc.jsml.structures.responses.SmlPublicOpenRes;
+
+/**
+ * Class to parse a SML_FILE
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ */
+@NonNullByDefault
+public class SmlFileDebugOutput {
+
+    private SmlFileDebugOutput() {
+        // private constructor to hide the implicit public one, since static methods should be accessed in static way so
+        // there is no need of public constructor
+    }
+
+    /**
+     * Prints the whole SML_File
+     *
+     * @param smlFile
+     *            the SML file
+     */
+    public static void printFile(SmlFile smlFile, Consumer<String> consumer) {
+        List<SmlMessage> smlMessages = smlFile.getMessages();
+
+        for (SmlMessage smlMessage : smlMessages) {
+            EMessageBody messageBody = smlMessage.getMessageBody().getTag();
+
+            switch (messageBody) {
+                case OPEN_REQUEST:
+                    parseOpenRequest(smlMessage, consumer);
+                    break;
+                case OPEN_RESPONSE:
+                    parseOpenResponse(smlMessage, consumer);
+                    break;
+                case CLOSE_REQUEST:
+                    parseCloseRequest(smlMessage, consumer);
+                    break;
+                case CLOSE_RESPONSE:
+                    parseCloseResponse(smlMessage, consumer);
+                    break;
+                case GET_PROFILE_PACK_REQUEST:
+                    parseGetProfilePackRequest(smlMessage, consumer);
+                    break;
+                case GET_PROFILE_PACK_RESPONSE:
+                    parseGetProfilePackResponse(smlMessage, consumer);
+                    break;
+                case GET_PROFILE_LIST_REQUEST:
+                    parseGetProfileListRequest(smlMessage, consumer);
+                    break;
+                case GET_PROFILE_LIST_RESPONSE:
+                    parseGetProfileListResponse(smlMessage, consumer);
+                    break;
+                case GET_PROC_PARAMETER_REQUEST:
+                    parseGetProcParameterRequest(smlMessage, consumer);
+                    break;
+                case GET_PROC_PARAMETER_RESPONSE:
+                    parseGetProcParameterResponse(smlMessage, consumer);
+                    break;
+                case SET_PROC_PARAMETER_REQUEST:
+                    parseSetProcParameterRequest(smlMessage, consumer);
+                    break;
+                case GET_LIST_REQUEST:
+                    parseGetListRequest(smlMessage, consumer);
+                    break;
+                case GET_LIST_RESPONSE:
+                    parseGetListResponse(smlMessage, consumer);
+                    break;
+                case ATTENTION_RESPONSE:
+                    parseAttentionResponse(smlMessage, consumer);
+                    break;
+                default:
+                    consumer.accept("type not found");
+            }
+        }
+    }
+
+    // ========================= Responses =================================
+
+    private static void parseGetListResponse(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got GetListResponse");
+        SmlGetListRes sml_listRes = (SmlGetListRes) smlMessage.getMessageBody().getChoice();
+
+        // consumer.accept(sml_listRes.toString());
+
+        consumer.accept(sml_listRes.toStringIndent(" "));
+    }
+
+    private static void parseAttentionResponse(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got AttentionResponse");
+        SmlAttentionRes sml_attentionRes = (SmlAttentionRes) smlMessage.getMessageBody().getChoice();
+        consumer.accept(sml_attentionRes.toString());
+    }
+
+    private static void parseGetProcParameterResponse(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got GetProcParameterResponse");
+        SmlGetProcParameterRes sml_getProcParameterRes = (SmlGetProcParameterRes) smlMessage.getMessageBody()
+                .getChoice();
+        consumer.accept(sml_getProcParameterRes.toString());
+    }
+
+    private static void parseGetProfileListResponse(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got GetProfileListResponse");
+        SmlGetProfileListRes sml_getProfileListRes = (SmlGetProfileListRes) smlMessage.getMessageBody().getChoice();
+        consumer.accept(sml_getProfileListRes.toString());
+    }
+
+    private static void parseOpenResponse(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got OpenResponse");
+        SmlPublicOpenRes sml_PublicOpenRes = (SmlPublicOpenRes) smlMessage.getMessageBody().getChoice();
+        consumer.accept(sml_PublicOpenRes.toString());
+    }
+
+    private static void parseCloseResponse(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got CloseResponse");
+        SmlPublicCloseRes sml_PublicCloseRes = (SmlPublicCloseRes) smlMessage.getMessageBody().getChoice();
+        consumer.accept(sml_PublicCloseRes.toString());
+    }
+
+    private static void parseGetProfilePackResponse(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got GetProfilePackResponse");
+        SmlGetProfilePackRes sml_getProfilePackRes = (SmlGetProfilePackRes) smlMessage.getMessageBody().getChoice();
+        consumer.accept(sml_getProfilePackRes.toString());
+    }
+
+    // ========================= Requests =================================
+
+    private static void parseCloseRequest(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got CloseRequest");
+    }
+
+    private static void parseGetProfileListRequest(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got GetProfileListRequest");
+    }
+
+    private static void parseGetProfilePackRequest(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got GetProfilePackRequest");
+    }
+
+    private static void parseOpenRequest(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got OpenRequest");
+    }
+
+    private static void parseGetProcParameterRequest(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got GetProcParameterRequest");
+    }
+
+    private static void parseSetProcParameterRequest(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got SetProcParameterRequest");
+    }
+
+    private static void parseGetListRequest(SmlMessage smlMessage, Consumer<String> consumer) {
+        consumer.accept("Got GetListRequest");
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/sml/SmlMeterReader.java

@@ -0,0 +1,161 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.sml;
+
+import java.util.List;
+import java.util.function.Supplier;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.connectors.IMeterReaderConnector;
+import org.openhab.binding.smartmeter.internal.MeterDevice;
+import org.openhab.binding.smartmeter.internal.MeterValue;
+import org.openhab.binding.smartmeter.internal.helper.ProtocolMode;
+import org.openhab.core.io.transport.serial.SerialPortManager;
+import org.openmuc.jsml.structures.ASNObject;
+import org.openmuc.jsml.structures.EMessageBody;
+import org.openmuc.jsml.structures.SmlFile;
+import org.openmuc.jsml.structures.SmlList;
+import org.openmuc.jsml.structures.SmlListEntry;
+import org.openmuc.jsml.structures.SmlMessage;
+import org.openmuc.jsml.structures.SmlStatus;
+import org.openmuc.jsml.structures.responses.SmlGetListRes;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Represents a SML capable device.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ * @author Mathias Gilhuber - Also-By
+ */
+@NonNullByDefault
+public final class SmlMeterReader extends MeterDevice<SmlFile> {
+
+    protected final Logger logger = LoggerFactory.getLogger(SmlMeterReader.class);
+
+    /**
+     * Static factory method to create a SmlDevice object with a serial connector member.
+     *
+     * @param serialPortManagerSupplier
+     *
+     * @param deviceId the id of the device as defined in openHAB configuration.
+     * @param pullRequestRequired identicates if SML values have to be actively requested.
+     * @param serialPort the port where the device is connected as defined in openHAB configuration.
+     * @param serialParameter
+     * @param initMessage
+     */
+    public static SmlMeterReader createInstance(Supplier<SerialPortManager> serialPortManagerSupplier, String deviceId,
+            String serialPort, byte @Nullable [] initMessage, int baudrate, int baudrateChangeDelay) {
+        SmlMeterReader device = new SmlMeterReader(serialPortManagerSupplier, deviceId, serialPort, initMessage,
+                baudrate, baudrateChangeDelay, ProtocolMode.SML);
+
+        return device;
+    }
+
+    /**
+     * Constructor to create a SmlDevice object with a serial connector member.
+     *
+     * @param deviceId the id of the device as defined in openHAB configuration.
+     * @param serialPort the port where the device is connected as defined in openHAB configuration.
+     * @param serialParameter
+     * @param initMessage
+     * @param baudrate
+     */
+    private SmlMeterReader(Supplier<SerialPortManager> serialPortManagerSupplier, String deviceId, String serialPort,
+            byte @Nullable [] initMessage, int baudrate, int baudrateChangeDelay, ProtocolMode protocolMode) {
+        super(serialPortManagerSupplier, deviceId, serialPort, initMessage, baudrate, baudrateChangeDelay,
+                protocolMode);
+
+        logger.debug("Created SmlDevice instance {} with serial connector on port {}", deviceId, serialPort);
+    }
+
+    /**
+     * Decodes native SML informations from the device and stores them locally until the next read request.
+     *
+     * @param smlFile the native SML informations from the device
+     */
+    @Override
+    protected void populateValueCache(SmlFile smlFile) {
+        if (logger.isTraceEnabled()) {
+            logger.trace("Read out following SML file: {}", System.lineSeparator());
+            SmlFileDebugOutput.printFile(smlFile, (msg) -> logger.trace(msg));
+        }
+        List<SmlMessage> smlMessages = smlFile.getMessages();
+
+        if (smlMessages != null) {
+            int messageCount = smlMessages.size();
+
+            if (messageCount <= 0) {
+                logger.warn("{}: no valid SML messages list retrieved.", this.toString());
+            }
+
+            for (int i = 0; i < messageCount; i++) {
+                SmlMessage smlMessage = smlMessages.get(i);
+
+                int tag = smlMessage.getMessageBody().getTag().id();
+
+                if (tag != EMessageBody.GET_LIST_RESPONSE.id()) {
+                    continue;
+                }
+
+                SmlGetListRes listResponse = (SmlGetListRes) smlMessage.getMessageBody().getChoice();
+                SmlList smlValueList = listResponse.getValList();
+                SmlListEntry[] smlListEntries = smlValueList.getValListEntry();
+
+                for (SmlListEntry entry : smlListEntries) {
+                    SmlValueExtractor valueExtractor = new SmlValueExtractor(entry);
+                    String obis = valueExtractor.getObisCode();
+
+                    MeterValue<?> smlValue = getMeterValue(obis);
+
+                    if (smlValue == null) {
+                        smlValue = valueExtractor.getSmlValue();
+                    }
+
+                    SmlStatus status = entry.getStatus();
+                    if (status != null) {
+                        String statusValue = readStatus(status, obis);
+                        if (statusValue != null) {
+                            smlValue.setStatus(statusValue);
+                        }
+                    }
+
+                    addObisCache(smlValue);
+                }
+            }
+        } else {
+            logger.warn("{}: no valid SML messages list retrieved.", this.toString());
+        }
+    }
+
+    private @Nullable String readStatus(SmlStatus status, String obis) {
+        ASNObject choice = status.getChoice();
+        if (choice != null) {
+            String statusValue = choice.toString();
+            return statusValue;
+        }
+        return null;
+    }
+
+    @Override
+    protected IMeterReaderConnector<SmlFile> createConnector(Supplier<SerialPortManager> serialPortManagerSupplier,
+            String serialPort, int baudrate, int baudrateChangeDelay, ProtocolMode protocolMode) {
+        return new SmlSerialConnector(serialPortManagerSupplier, serialPort, baudrate, baudrateChangeDelay);
+    }
+
+    @Override
+    protected void printInfo() {
+        super.printInfo();
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/sml/SmlSerialConnector.java

@@ -0,0 +1,172 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.sml;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.text.MessageFormat;
+import java.util.Stack;
+import java.util.function.Supplier;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.binding.smartmeter.connectors.ConnectorBase;
+import org.openhab.binding.smartmeter.internal.helper.Baudrate;
+import org.openhab.binding.smartmeter.internal.helper.SerialParameter;
+import org.openhab.core.io.transport.serial.PortInUseException;
+import org.openhab.core.io.transport.serial.SerialPort;
+import org.openhab.core.io.transport.serial.SerialPortIdentifier;
+import org.openhab.core.io.transport.serial.SerialPortManager;
+import org.openhab.core.io.transport.serial.UnsupportedCommOperationException;
+import org.openhab.core.util.HexUtils;
+import org.openmuc.jsml.structures.SmlFile;
+import org.openmuc.jsml.transport.Transport;
+
+/**
+ * Represents a serial SML device connector.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ * @author Mathias Gilhuber - Also-By
+ */
+@NonNullByDefault
+public final class SmlSerialConnector extends ConnectorBase<SmlFile> {
+
+    private static final Transport TRANSPORT = new Transport();
+
+    private Supplier<SerialPortManager> serialManagerSupplier;
+    @NonNullByDefault({})
+    private SerialPort serialPort;
+    @Nullable
+    private DataInputStream is;
+    @Nullable
+    private DataOutputStream os;
+    private int baudrate;
+
+    /**
+     * Constructor to create a serial connector instance.
+     *
+     * @param portName the port where the device is connected as defined in openHAB configuration.
+     */
+    public SmlSerialConnector(Supplier<SerialPortManager> serialPortManagerSupplier, String portName) {
+        super(portName);
+        this.serialManagerSupplier = serialPortManagerSupplier;
+    }
+
+    /**
+     * Constructor to create a serial connector instance with a specific serial parameter.
+     *
+     * @param portName the port where the device is connected as defined in openHAB configuration.
+     * @param baudrate
+     * @throws IOException
+     */
+    public SmlSerialConnector(Supplier<SerialPortManager> serialPortManagerSupplier, String portName, int baudrate,
+            int baudrateChangeDelay) {
+        this(serialPortManagerSupplier, portName);
+        this.baudrate = baudrate;
+    }
+
+    @Override
+    protected SmlFile readNext(byte @Nullable [] initMessage) throws IOException {
+        if (initMessage != null) {
+            logger.debug("Writing init message: {}", HexUtils.bytesToHex(initMessage, " "));
+            if (os != null) {
+                os.write(initMessage);
+                os.flush();
+            }
+        }
+
+        // read out the whole buffer. We are only interested in the most recent SML file.
+        Stack<SmlFile> smlFiles = new Stack<>();
+        do {
+            logger.trace("Reading {}. SML message", smlFiles.size() + 1);
+            smlFiles.push(TRANSPORT.getSMLFile(is));
+        } while (is != null && is.available() > 0);
+        if (smlFiles.isEmpty()) {
+            throw new IOException(getPortName() + " : There is no SML file in buffer. Try to increase Refresh rate.");
+        }
+        logger.debug("{} : Read {} SML files from Buffer", this.getPortName(), smlFiles.size());
+        return smlFiles.pop();
+    }
+
+    @Override
+    public void openConnection() throws IOException {
+        closeConnection();
+        SerialPortIdentifier id = serialManagerSupplier.get().getIdentifier(getPortName());
+        if (id != null) {
+            try {
+                serialPort = id.open("meterreaderbinding", 0);
+            } catch (PortInUseException e) {
+                throw new IOException(MessageFormat
+                        .format("Error at SerialConnector.openConnection: unable to open port {0}.", getPortName()), e);
+            }
+            SerialParameter serialParameter = SerialParameter._8N1;
+            int baudrateToUse = this.baudrate == Baudrate.AUTO.getBaudrate() ? Baudrate._9600.getBaudrate()
+                    : this.baudrate;
+            try {
+                serialPort.setSerialPortParams(baudrateToUse, serialParameter.getDatabits(),
+                        serialParameter.getStopbits(), serialParameter.getParity());
+                serialPort.setFlowControlMode(SerialPort.FLOWCONTROL_RTSCTS_IN | SerialPort.FLOWCONTROL_RTSCTS_OUT);
+                try {
+                    serialPort.enableReceiveTimeout(100);
+                } catch (UnsupportedCommOperationException e) {
+                    // doesn't matter (rfc2217 is not supporting this)
+                }
+            } catch (UnsupportedCommOperationException e) {
+                throw new IOException(MessageFormat.format(
+                        "Error at SerialConnector.openConnection: unable to set serial port parameters for port {0}.",
+                        getPortName()), e);
+            }
+            // serialPort.setFlowControlMode(SerialPort.FLOWCONTROL_RTSCTS_IN | SerialPort.FLOWCONTROL_RTSCTS_OUT);
+            serialPort.notifyOnDataAvailable(true);
+            is = new DataInputStream(new BufferedInputStream(serialPort.getInputStream()));
+            os = new DataOutputStream(new BufferedOutputStream(serialPort.getOutputStream()));
+        } else {
+            throw new IllegalStateException(MessageFormat.format("No provider for port {0} found", getPortName()));
+        }
+    }
+
+    /**
+     * @{inheritDoc}
+     */
+    @Override
+    public void closeConnection() {
+        try {
+            if (is != null) {
+                is.close();
+                is = null;
+            }
+        } catch (IOException e) {
+            logger.error("Failed to close serial input stream", e);
+        }
+        try {
+            if (os != null) {
+                os.close();
+                os = null;
+            }
+        } catch (IOException e) {
+            logger.error("Failed to close serial output stream", e);
+        }
+        if (serialPort != null) {
+            serialPort.close();
+            serialPort = null;
+        }
+    }
+
+    @Override
+    protected boolean applyPeriod() {
+        return true;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/sml/SmlUnitConversion.java

@@ -0,0 +1,216 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.sml;
+
+import javax.measure.Quantity;
+import javax.measure.Unit;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.core.library.unit.SIUnits;
+import org.openhab.core.library.unit.SmartHomeUnits;
+import org.openmuc.jsml.EUnit;
+
+/**
+ * Converts a {@link EUnit} to an {@link Unit}.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ *
+ */
+@NonNullByDefault
+public class SmlUnitConversion {
+
+    @SuppressWarnings("unchecked")
+    public static @Nullable <Q extends Quantity<Q>> Unit<Q> getUnit(EUnit unit) {
+        Unit<?> javaUnit = null;
+        switch (unit) {
+            case AMPERE:
+                javaUnit = SmartHomeUnits.AMPERE;
+                break;
+            case AMPERE_HOUR:
+                javaUnit = SmartHomeUnits.AMPERE.divide(SmartHomeUnits.HOUR);
+                break;
+            case AMPERE_PER_METRE:
+                javaUnit = SmartHomeUnits.AMPERE.multiply(SIUnits.METRE);
+                break;
+            case AMPERE_SQUARED_HOURS:
+                javaUnit = SmartHomeUnits.AMPERE.pow(2).multiply(SmartHomeUnits.HOUR);
+                break;
+            case BAR:
+                javaUnit = SIUnits.PASCAL.multiply(100000);
+                break;
+            case COULOMB:
+                javaUnit = SmartHomeUnits.COULOMB;
+                break;
+
+            case CUBIC_METRE:
+            case CUBIC_METRE_CORRECTED:
+                javaUnit = SIUnits.CUBIC_METRE;
+                break;
+            case CUBIC_METRE_PER_DAY:
+            case CUBIC_METRE_PER_DAY_CORRECTED:
+                javaUnit = SIUnits.CUBIC_METRE.divide(SmartHomeUnits.DAY);
+                break;
+            case CUBIC_METRE_PER_HOUR:
+            case CUBIC_METRE_PER_HOUR_CORRECTED:
+                javaUnit = SIUnits.CUBIC_METRE.divide(SmartHomeUnits.HOUR);
+                break;
+
+            case DAY:
+                javaUnit = SmartHomeUnits.DAY;
+                break;
+            case DEGREE:
+                javaUnit = SmartHomeUnits.DEGREE_ANGLE;
+                break;
+            case DEGREE_CELSIUS:
+                javaUnit = SIUnits.CELSIUS;
+                break;
+
+            case FARAD:
+                javaUnit = SmartHomeUnits.FARAD;
+                break;
+            case HENRY:
+                javaUnit = SmartHomeUnits.HENRY;
+                break;
+            case HERTZ:
+                javaUnit = SmartHomeUnits.HERTZ;
+                break;
+            case HOUR:
+                javaUnit = SmartHomeUnits.HOUR;
+                break;
+            case JOULE:
+                javaUnit = SmartHomeUnits.JOULE;
+                break;
+            case JOULE_PER_HOUR:
+                javaUnit = SmartHomeUnits.JOULE.divide(SmartHomeUnits.HOUR);
+                break;
+            case KELVIN:
+                javaUnit = SmartHomeUnits.KELVIN;
+                break;
+            case KILOGRAM:
+                javaUnit = SIUnits.KILOGRAM;
+            case KILOGRAM_PER_SECOND:
+                javaUnit = SIUnits.KILOGRAM.divide(SmartHomeUnits.SECOND);
+                break;
+            case LITRE:
+                javaUnit = SmartHomeUnits.LITRE;
+                break;
+            case MASS_DENSITY:
+                break;
+            case METER_CONSTANT_OR_PULSE_VALUE:
+                break;
+            case METRE:
+                javaUnit = SIUnits.METRE;
+                break;
+            case METRE_PER_SECOND:
+                javaUnit = SmartHomeUnits.METRE_PER_SECOND;
+                break;
+            case MOLE_PERCENT:
+                javaUnit = SmartHomeUnits.MOLE;
+                break;
+            case MONTH:
+                javaUnit = SmartHomeUnits.YEAR.divide(12);
+                break;
+            case NEWTON:
+                javaUnit = SmartHomeUnits.NEWTON;
+            case NEWTONMETER:
+                javaUnit = SmartHomeUnits.NEWTON.multiply(SIUnits.METRE);
+                break;
+            case OHM:
+                javaUnit = SmartHomeUnits.OHM;
+                break;
+            case OHM_METRE:
+                javaUnit = SmartHomeUnits.OHM.multiply(SIUnits.METRE);
+                break;
+            case PASCAL:
+                javaUnit = SIUnits.PASCAL;
+                break;
+            case PASCAL_SECOND:
+                javaUnit = SIUnits.PASCAL.multiply(SmartHomeUnits.SECOND);
+                break;
+            case PERCENTAGE:
+                javaUnit = SmartHomeUnits.PERCENT;
+                break;
+            case SECOND:
+                javaUnit = SmartHomeUnits.SECOND;
+                break;
+            case TESLA:
+                javaUnit = SmartHomeUnits.TESLA;
+                break;
+            case VAR:
+                javaUnit = SmartHomeUnits.WATT.alternate("Var");
+                break;
+            case VAR_HOUR:
+                javaUnit = SmartHomeUnits.WATT.alternate("Var").multiply(SmartHomeUnits.HOUR);
+                break;
+            case VOLT:
+                javaUnit = SmartHomeUnits.VOLT;
+                break;
+            case VOLT_AMPERE:
+                javaUnit = SmartHomeUnits.VOLT.multiply(SmartHomeUnits.AMPERE);
+                break;
+            case VOLT_AMPERE_HOUR:
+                javaUnit = SmartHomeUnits.VOLT.multiply(SmartHomeUnits.AMPERE).multiply(SmartHomeUnits.HOUR);
+                break;
+            case VOLT_PER_METRE:
+                javaUnit = SmartHomeUnits.WATT.divide(SIUnits.METRE);
+                break;
+            case VOLT_SQUARED_HOURS:
+                javaUnit = SmartHomeUnits.VOLT.pow(2).multiply(SmartHomeUnits.HOUR);
+                break;
+            case WATT:
+                javaUnit = SmartHomeUnits.WATT;
+                break;
+            case WATT_HOUR:
+                javaUnit = SmartHomeUnits.WATT.multiply(SmartHomeUnits.HOUR);
+                break;
+            case WEBER:
+                javaUnit = SmartHomeUnits.WEBER;
+                break;
+            case WEEK:
+                javaUnit = SmartHomeUnits.WEEK;
+                break;
+            case YEAR:
+                javaUnit = SmartHomeUnits.YEAR;
+                break;
+
+            // not clearly defined yet:
+            case VOLT_SQUARED_HOUR_METER_CONSTANT_OR_PULSE_VALUE:
+                break;
+            case REACTIVE_ENERGY_METER_CONSTANT_OR_PULSE_VALUE:
+                break;
+            case ACTIVE_ENERGY_METER_CONSTANT_OR_PULSE_VALUE:
+                break;
+            case AMPERE_SQUARED_HOUR_METER_CONSTANT_OR_PULSE_VALUE:
+                break;
+            case APPARENT_ENERGY_METER_CONSTANT_OR_PULSE_VALUE:
+                break;
+            case ENERGY_PER_VOLUME:
+                break;
+            case CALORIFIC_VALUE:
+                break;
+
+            // no unit possible:
+            case MIN:
+            case OTHER_UNIT:
+            case RESERVED:
+            case COUNT:
+            case CURRENCY:
+            case EMPTY:
+                break;
+            default:
+                break;
+        }
+        return (Unit<Q>) javaUnit;
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/sml/SmlValueExtractor.java

@@ -0,0 +1,163 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.smartmeter.internal.sml;
+
+import java.util.Arrays;
+
+import javax.measure.Quantity;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.openhab.binding.smartmeter.SmartMeterBindingConstants;
+import org.openhab.binding.smartmeter.internal.MeterValue;
+import org.openmuc.jsml.EObis;
+import org.openmuc.jsml.EUnit;
+import org.openmuc.jsml.structures.ASNObject;
+import org.openmuc.jsml.structures.SmlListEntry;
+
+/**
+ * Proxy class to encapsulate a openMUC SML_ListEntry-Object to read informations.
+ *
+ * @author Matthias Steigenberger - Initial contribution
+ * @author Mathias Gilhuber - Also-By
+ */
+@NonNullByDefault
+public final class SmlValueExtractor {
+
+    /**
+     * Stores the original value object from jSML
+     */
+    SmlListEntry smlListEntry;
+
+    /**
+     * Constructor
+     *
+     * @param obis
+     */
+    public SmlValueExtractor(SmlListEntry listEntry) {
+        smlListEntry = listEntry;
+    }
+
+    public <Q extends Quantity<Q>> MeterValue<Q> getSmlValue() {
+        return new MeterValue<Q>(getObisCode(), getValue(), SmlUnitConversion.getUnit(getUnit()));
+    }
+
+    /**
+     * Gets the values unit.
+     *
+     * @return the values unit if available - Integer.MIN_VALUE.
+     */
+    public EUnit getUnit() {
+        return EUnit.from(smlListEntry.getUnit().getVal());
+    }
+
+    /**
+     * Gets the values unit.
+     *
+     * @return the string representation of the values unit - otherwise null.
+     */
+    public String getUnitName() {
+        EUnit unitEnum = getUnit();
+        return unitEnum.name();
+    }
+
+    /**
+     * Gets a human readable name of the OBIS code.
+     *
+     * @return The name of the obis code or {@link EObis#UNKNOWN} if not known
+     */
+    public String getObisName() {
+        String obisName = null;
+        EObis smlUnit = Arrays.asList(EObis.values()).stream()
+                .filter((a) -> a.obisCode().equals(smlListEntry.getObjName())).findAny().orElseGet(() -> EObis.UNKNOWN);
+        obisName = smlUnit.name();
+
+        return obisName;
+    }
+
+    @Override
+    public String toString() {
+        return "Value: '" + this.getValue() + "' Unit: '" + this.getUnitName() + "' Scaler:'" + this.getScaler() + "'";
+    }
+
+    /**
+     * Gets the value
+     *
+     * @return the value as String if available - otherwise null.
+     */
+    public String getValue() {
+        org.openmuc.jsml.structures.SmlValue smlValue = smlListEntry.getValue();
+        ASNObject choice = smlValue.getChoice();
+        String value = choice.toString();
+        try {
+            value = scaleValue(Double.parseDouble(value)) + "";
+        } catch (Exception e) {
+            // value is no numeric value
+        }
+        return value;
+    }
+
+    /**
+     * Gets the scaler which has to be applied to the value.
+     *
+     * @return scaler which has to be applied to the value.
+     */
+    double getScaler() {
+        int scaler = 0;
+
+        if (smlListEntry.getScaler().isSelected()) {
+            byte scalerByte = smlListEntry.getScaler().getVal();
+
+            scaler = Integer.parseInt(String.format("%02x", scalerByte), 16);
+
+            if (scaler > 127) {
+                scaler -= 256;
+            }
+        }
+
+        return Math.pow(10, scaler);
+    }
+
+    /**
+     * Scales the value if necessary
+     *
+     * @return a string representation of the scaled value.
+     */
+    Double scaleValue(Double originalValue) {
+        return originalValue * getScaler();
+    }
+
+    /**
+     * Byte to Integer conversion.
+     *
+     * @param byte to convert to Integer.
+     */
+    private static int byteToInt(byte b) {
+        return Integer.parseInt(String.format("%02x", b), 16);
+    }
+
+    /**
+     * Converts hex encoded OBIS to formatted string.
+     *
+     * @return the hex encoded OBIS code as readable string.
+     */
+    protected static String getObisAsString(byte[] octetBytes) {
+        String formattedObis = String.format(SmartMeterBindingConstants.OBIS_FORMAT_MINIMAL, byteToInt(octetBytes[0]),
+                byteToInt(octetBytes[1]), byteToInt(octetBytes[2]), byteToInt(octetBytes[3]), byteToInt(octetBytes[4]));
+
+        return formattedObis;
+    }
+
+    public String getObisCode() {
+        return getObisAsString(smlListEntry.getObjName().getValue());
+    }
+}

bundles/org.openhab.binding.smartmeter/src/main/resources/OH-INF/binding/binding.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<binding:binding id="smartmeter" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:binding="https://openhab.org/schemas/binding/v1.0.0"
+	xsi:schemaLocation="https://openhab.org/schemas/binding/v1.0.0 https://openhab.org/schemas/binding-1.0.0.xsd">
+
+	<name>Smartmeter Binding</name>
+	<description>
+		The Smartmeter binding is able to read SML messages (PUSH) and supports IEC 62056-21 modes A,B,C (PULL)
+		and D (PUSH).
+	</description>
+
+</binding:binding>

bundles/org.openhab.binding.smartmeter/src/main/resources/OH-INF/config/config-descriptions.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<config-description:config-descriptions
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:config-description="https://openhab.org/schemas/config-description/v1.0.0"
+	xsi:schemaLocation="https://openhab.org/schemas/config-description/v1.0.0
+		https://openhab.org/schemas/config-description-1.0.0.xsd">
+
+	<config-description uri="channel-type:smartmeter:obis">
+
+		<parameter name="negate" type="text">
+			<advanced>true</advanced>
+			<label>Negate Property</label>
+			<description>e.g. 1-0_1-8-0:5:1:status //negate if status(1-0_1-8-0) and 2^5 = 1</description>
+		</parameter>
+
+	</config-description>
+
+</config-description:config-descriptions>

bundles/org.openhab.binding.smartmeter/src/main/resources/OH-INF/thing/thing-types.xml

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<thing:thing-descriptions bindingId="smartmeter"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:config-description="https://openhab.org/schemas/config-description/v1.0.0"
+	xmlns:thing="https://openhab.org/schemas/thing-description/v1.0.0"
+	xsi:schemaLocation="https://openhab.org/schemas/thing-description/v1.0.0 https://openhab.org/schemas/thing-description-1.0.0.xsd">
+
+	<thing-type id="meter">
+		<label>Smart Meter</label>
+		<description>The meter device to read the SML or IEC 62056-21 messages from</description>
+		<config-description>
+			<parameter name="port" type="text">
+				<label>Serial Port</label>
+				<description>The device serial port (e.g. /dev/tty0 or COM1)</description>
+				<required>true</required>
+				<limitToOptions>false</limitToOptions>
+				<context>serial-port</context>
+			</parameter>
+			<parameter name="refresh" type="integer">
+				<advanced>true</advanced>
+				<label>Refresh Rate</label>
+				<description>Refresh rate in seconds</description>
+				<default>10</default>
+				<unitLabel>s</unitLabel>
+			</parameter>
+			<parameter name="baudrateChangeDelay" type="integer">
+				<advanced>true</advanced>
+				<label>Delay of Baudrate Change</label>
+				<unitLabel>ms</unitLabel>
+				<default>0</default>
+				<description>USB to serial converters often require a delay of up to 250ms after the ACK before changing baudrate</description>
+			</parameter>
+			<parameter name="baudrate" type="text">
+				<advanced>true</advanced>
+				<label>Baudrate</label>
+				<default>AUTO</default>
+				<description>The baudrate of the serial port. If set to 'AUTO', it is dependent on the selected mode. The default is
+					300 baud for modes A, B, and C and 2400 baud for mode D, and 9600 baud for SML.</description>
+				<limitToOptions>false</limitToOptions>
+			</parameter>
+			<parameter name="mode" type="text">
+				<advanced>true</advanced>
+				<label>The Protocol Mode to Use</label>
+				<default>SML</default>
+				<description>Can be SML (PUSH mode), Mode A,B,C (PULL)or D (PUSH)</description>
+			</parameter>
+			<parameter name="conformity" type="text">
+				<advanced>true</advanced>
+				<label>Conform to Specific Standard Semantics</label>
+				<default>NONE</default>
+				<description>Reserved to conform to special semantics specified in specific standards. EDL_FNN: Currently applies
+					the energy direction to WATT channels (which are absolute values) (see fnn lastenheft edl)</description>
+				<limitToOptions>true</limitToOptions>
+			</parameter>
+		</config-description>
+	</thing-type>
+
+</thing:thing-descriptions>