- Platform information:
- Hardware: Raspberry Pi 4 / 4GB / 64GB microSD
- OS: openhabian v1.6.2 / Debian 10.7 / Linux 5.4.83
- Java Runtime Environment: Zulu 11
- openHAB version: 3.0
- Issue of the topic: Channel events for the Astro binding, or possibly all channel events, do not trigger rules.
I have created the following rule:
rule "Day Has Ended"
when
Channel "astro:sun:local:daylight#event" triggered END
then
RelaySwitch_Switch.sendCommand(ON)
ApplianceModule_Switch.sendCommand(ON)
end
I do not believe that the actual rule content matters that much since the “when” never happens. Anyway, I have a channel “astro:sun:local:daylight” which was created through the UI with the Astro binding. Rather than waiting for much time to pass, I triggered the event in the console:
openhab> openhab:things trigger astro:sun:local:daylight#event END
I’m not sure how to include the astro piece in this message, but I’ll try!
UID: astro:sun:local
label: Local Sun
thingTypeUID: astro:sun
configuration:
useMeteorologicalSeason: false
interval: 300
geolocation: lat,lon # masked for privacy
- If logs where generated please post these here using code fences:
2021-01-12 21:14:06.907 [ERROR] [internal.events.ThreadedEventHandler] - Error on event handling.
java.lang.NullPointerException: null
at java.lang.String.contains(String.java:2036) ~[?:?]
at org.openhab.core.automation.internal.module.handler.ChannelEventTriggerHandler.apply(ChannelEventTriggerHandler.java:91) ~[?:?]
at org.openhab.core.internal.events.EventHandler.dispatchEvent(EventHandler.java:143) ~[bundleFile:?]
at org.openhab.core.internal.events.EventHandler.handleEvent(EventHandler.java:111) ~[bundleFile:?]
at org.openhab.core.internal.events.EventHandler.handleEvent(EventHandler.java:84) ~[bundleFile:?]
at org.openhab.core.internal.events.ThreadedEventHandler.lambda$0(ThreadedEventHandler.java:67) [bundleFile:?]
at java.lang.Thread.run(Thread.java:834) [?:?]
I looked into ChannelEventTriggerHandler.java for OH3.0 in github and found this:
@Override
public boolean apply(Event event) {
logger.trace("->FILTER: {}:{}", event.getTopic(), TOPIC);
boolean eventMatches = false;
if (event instanceof ChannelTriggeredEvent) {
ChannelTriggeredEvent cte = (ChannelTriggeredEvent) event;
if (cte.getTopic().contains(this.channelUID)) {
logger.trace("->FILTER: {}:{}", cte.getEvent(), eventOnChannel);
eventMatches = true;
if (eventOnChannel != null && !eventOnChannel.isEmpty() && !eventOnChannel.equals(cte.getEvent())) {
eventMatches = false;
}
}
}
return eventMatches;
}
This is the problematic line:
if (cte.getTopic().contains(this.channelUID)) {
I dug in a little deeper and I was unable to tell if the topic was null or the channelUID was null. This is the point at which I gave up and will control my lights with a switch like a caveman or just specify a time for them to turn on and off until this gets resolved.
How do I set the logging so that I can see the first trace message? That would tell me if it’s the topic or the UID.
Congrats on OH3 – it’s a lot nicer than OH2.x and if I had dawn / dusk events I’d be even happier. 
I can tell that many people put a ton of work into this!
