diff --git a/bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/SmartMeterBindingConstants.java b/bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/SmartMeterBindingConstants.java
index 8738b7471..de2b535b4 100644
--- a/bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/SmartMeterBindingConstants.java
+++ b/bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/SmartMeterBindingConstants.java
@@ -36,14 +36,18 @@ public class SmartMeterBindingConstants {
     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);
+    public static final String OBIS_PATTERN_CHANNELID = getObisChannelIdPattern(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) {
+    public static String getObisChannelIdPattern(String obis) {
         return obis.replaceAll("\\.", "-").replaceAll(":|\\*", "_");
     }
+
+    public static String getObisChannelId(String obis) {
+        return getObisChannelIdPattern(obis).replaceAll("[^\\w-]", "");
+    }
 }
diff --git a/bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/iec62056/Iec62056_21SerialConnector.java b/bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/iec62056/Iec62056_21SerialConnector.java
index 81f8ba404..f1a06905c 100644
--- a/bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/iec62056/Iec62056_21SerialConnector.java
+++ b/bundles/org.openhab.binding.smartmeter/src/main/java/org/openhab/binding/smartmeter/internal/iec62056/Iec62056_21SerialConnector.java
@@ -100,6 +100,7 @@ public class Iec62056_21SerialConnector extends ConnectorBase<DataMessage> {
                         @Override
                         public void newDataMessage(@Nullable DataMessage dataMessage) {
                             logger.debug("Datamessage read: {}", dataMessage);
+                            emitter.onError(new IllegalArgumentException("Error while emitting dataMessage"));
                             emitter.onNext(dataMessage);
                         }