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[hue] Implementing "[discovery.upnp] Devices may apply a grace period" (#9985)

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* [hue] implement PR #2144 in openhab.core
* [hue] add binding configuration parameter; return long

Signed-off-by: Andrew Fiddian-Green <software@whitebear.ch>
This commit is contained in:
Andrew Fiddian-Green
2021-02-09 20:52:11 +00:00
committed by GitHub
parent f8d5ae081b
commit 18e028a632
4 changed files with 59 additions and 3 deletions
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bundles/org.openhab.binding.hue/README.md
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@@ -367,3 +367,11 @@ if (receivedEvent == "1000.0")) {
//do stuff
}
```
### UPnP Discovery: Inbox 'Grace Period'
The Hue Bridge can sometimes be late in sending its UPnP 'ssdp:alive' notifications even though it has not really gone offline.
This means that the Hue Bridge could be repeatedly removed from, and (re)added to, the InBox.
Which would lead to confusion in the UI, and repeated logger messages.
To prevent this, the binding tells the OpenHAB core to wait for a further period of time ('grace period') before actually removing the Bridge from the Inbox.
The 'grace period' has a default value of 50 seconds, but it can be fine tuned in the main UI via Settings | Bindings | Hue | Configure.