sensor value to mqtt | Home Assistant | Page 1

cinder merlin Feb 25, 2025, 6:32 PM

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hi,
i want to send an ha sensor value to mqtt.
atm i do that with an automation and mqtt.publish.
the automation is triggeres every second or less.
is there another way to do that?
maybe with less resources?

gilded sparrow Feb 25, 2025, 6:33 PM

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Why not just do it when the sensor value changes? (state trigger)

cinder merlin Feb 25, 2025, 8:28 PM

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thats the case

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it changes very oftn and should be transmitted immediately

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the question is if it exists another way to do that.

gilded sparrow Feb 25, 2025, 8:56 PM

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Ah OK. So it's not updating every second, it's updating when the sensor updates which happens to be every second. Gotcha.

cinder merlin Feb 25, 2025, 8:57 PM

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jep

gilded sparrow Feb 25, 2025, 8:58 PM

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Honestly, not through home assistant - if you want to transmit every change, and it's updating that frequently, then there's no real way around just sending the event

cinder merlin Feb 25, 2025, 8:59 PM

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is there a way to do that an other way than with an automation?

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i need the energy sensor value of the tibber integration as mqtt

gilded sparrow Feb 25, 2025, 9:00 PM

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As for doing it with less resources (not that an automation running every second is particularly problematic) it depends on the sensor, but publishing directly to mqtt would be easier than reading to ha then republish to mqtt

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Ah I see, so virtual sensor not like a esphome device

cinder merlin Feb 25, 2025, 9:01 PM

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yes

gilded sparrow Feb 25, 2025, 9:01 PM

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Why does it need to be updated so instantly, what are you running off it?

cinder merlin Feb 25, 2025, 9:02 PM

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the mqtt value is read by opendtuonbattery as energy meter value

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and used to to build an "nulleinspeisung" with an hm800

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so it should be near realtime as possible

gilded sparrow Feb 25, 2025, 9:04 PM

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I see

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And what issues is the automation causing?

cinder merlin Feb 25, 2025, 9:06 PM

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it is a bit slow and i want to know if there are better ways to do that

gilded sparrow Feb 25, 2025, 9:07 PM

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Well you could bypass home assistant with something like this https://github.com/danielringch/tibber2mqtt

GitHub

GitHub - danielringch/tibber2mqtt: Publishes Tibber live consumptio...

Publishes Tibber live consumption data from Tibber API per MQTT. - danielringch/tibber2mqtt

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I don't know how effective it is, polling rates etc

cinder merlin Feb 25, 2025, 9:08 PM

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i know that, but i dont want to ask the api twice

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the ha integration uses the api too

gilded sparrow Feb 25, 2025, 9:09 PM

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Yeah but the software implementation controls when it queries the api

cinder merlin Feb 25, 2025, 9:09 PM

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hm

gilded sparrow Feb 25, 2025, 9:10 PM

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And I can't imagine the ha integration and that work exactly the same. Could be better or worse, idk

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There might be other options but that's what I'd suggest trying at least

cinder merlin Feb 25, 2025, 9:11 PM

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ok

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so i need an extra task on another machine

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there are also php, bash and java implementations

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i will give them a try.

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so with ha it is best done with the automation thing, right?

#sensor value to mqtt