Is the outgoing transform a stop gap solution until such time that a more generic way can be implemented in the core infrastructure? Or is a more generic solution so far off as to just be a wish?
Donāt get me wrong, Iām thrilled to see the capability come back. Iām just curious.
Exactly. The transformation service is cached to at least avoid the service lookup on every publish.
I still not recommend a heavy javascript transformation, but some people might just need a MAP one.
Thanks for the great work on the MQTT binding.
I upgraded (without reading the release notes, auch) and found the new binding to require me te rewrite my .items and .things files. But glad I spend the time. Works great.
How would I use / test the 2.5 binding ?
(Iām using an apt based install).
Sorry, if Iām asking, but Iām still a bit confused
Presently I use the MQTT-Eventbus for integrating three OH2-instances, works flawlessly.
If I understand correctly, MQTT2.4+ doesnāt offer eventbus-functionality (as of yet). Are there any plans to implement something like eventbus in 2.5+?
So I presently should stay with MQTT1 and migrate later?
Eventbus access is not allowed for oh2 bindings. If you want it like it is with mqtt1, you unfortunately need to stick to v1. In oh2 you use rules/scripts instead to get a similar behaviour.
What I can imagine to be possible is a real add-on dedicated to connect multiple oh instances. Might use mqtt internally via the new mqtt support.
PS: Rules and scripts Sound a bit odd to have a simple eventbus-sync. So my opinion is, a āeventbus add-onā would be a real need - I can imagine, Iām not the only one having multiple OH2-instancesā¦
@David_Graeff I just updated to SNAPSHOT-2.5.0~S1498 to be able to use the min/max scaler on dimmer channels, but its not scaling the output only the input. From what I can tell it shouldnāt be doing that.
Do I need to manually updating the binding to the copy on github for that?
The documentation says āoutputs a value between 0 and 100ā. As long as that is in the ālatestā-section of the documentation, the corresponding change that I made recently is not yet available for openHAB.
In the future the output will be scaled as well, true.
Hi David, is there any news with regards of mqtt 2.5 outgoing transformation? Iāve moved to 2.5 snapshot, but I couldnāt found any info about it.
Thanks in advance!
I updated to OpenHAB 2.5.0-snapshot to fix some annoying bugs but I still noticed a big one in the MQTT binding or maybe in OpenHAB itself?
My mqtt payload is {"battery":100,"voltage":3032,"linkquality":60,"click":"single"} and Iām using the transformationPattern to get the click value.
Type string : click "Click" [ stateTopic="zigbee2mqtt/<DEVICE_ID>", transformationPattern="JSONPATH:$.click" ]
When I press the button twice, the first time it will set the value to single but the second time it will not change the item again because the value stays the same. Iām listening on item changes with node red. Right now itās not possible to turn a device on and off with a single click.
A stateful channel will only pass a value to an item if the value actually changed, that is correct.
You want the ātriggerā channel of the mqtt broker thing instead. If fires every time when a value is received.
The issue is, that you cannot apply a transformation before the condition (fixed string) is evaluated. You probably need a rule in this case.
any update on when the MQTT outgoing transformations will be implemented? I still have both the old MQTT and the new MQTT binding āworkingā side by side, but yesterday, for the second time, somehow the old binding stopped working. Iām not sure what I did last time to get it working again, but it would be great if we were able to migrate everything to the new binding.
It is implemented since two months or so Just remember that openHAB has no āstableā / āunstableā branches that gets any backports of later changes (we just call it āstableā). You must be on openHAB snapshots to get those changes.
The timing is just really bad at the moment, because openHAB is in the process of changing the build system. The snapshots sporadically do not work since that process started end of January and is finished by maybe end of the month.
Hi, i updated to Snapshot version but i couldnt find description of how to use outgoing transformations for mqtt, do you have a readme or link to examples? Thank you!
Look at the examples for incoming transformations, outgoing are working the same. Itās self explanatory in Paper UI so I donāt really get your question.