Help creating entities from MQTT

[JacquesdeBruyn]

Hi,

Probably a stupid question but for the life of me I can't figure out how to use the mqtt output. I've never used mqtt before and can't seem to find a sample setup that I can understand.

I'm trying to setup multiple PIR sensors. The first one gives me this code in mqtt:
20;AF;EV1527;ID=0daed6;SWITCH=09;CMD=ON;

others send a code when triggered and when trigger is over(LED turning on and off)
20;BF;EV1527;ID=01d108;SWITCH=09;CMD=ON;
and
20;C0;EV1527;ID=01d108;SWITCH=00;CMD=ON;

I'm not bothered about the switch off. Assuming I need to bind a trigger to message received from "ID"

Any help on how to setup one of these would be appreciated.

[crazyserver]

You have to create a helper and an automation that listens to the MQTT topic provided by the device. Then filter the values and change the helper.

alias: "MQTT listener example"
description: "Listen to a payload from RFLink32"
trigger:
  - platform: mqtt
    topic: /rflink/msg
    payload: "20;7A;LaCrosse-TX141Bv2;ID=00aa;TEMP=00c3;BAT=LOW;"
action:
  - service: input_boolean.turn_on
    data: {}
    target:
      entity_id: input_boolean.test

I'm working on having Json on the payloads and separate topics by device...

[JacquesdeBruyn]

I have automation setup, how do I deal with the first bit changing?
20;AF;EV1527;ID=0daed6;SWITCH=09;CMD=ON;
The 20:AF bit changes every time?

[JacquesdeBruyn]

Automation etc working, Just need a way to split different sensors apart, I have these three for now.

20;C8;EV1527;ID=0b5be2;SWITCH=09;CMD=ON;

20;C9;EV1527;ID=01d108;SWITCH=09;CMD=ON;

20;CA;EV1527;ID=0daed6;SWITCH=09;CMD=ON;

Can I filter out the Message counter or only respond to the device ID?

[crazyserver]

The ID is the device Id and the first 20;XX should be something like a checksum? So I'd have different automations or different triggers for every line here.

If I manage to get the Json solution integrated it will be easier to manage this.

I think I cannot help you more than that. Try to figure out all the possibilities, you can also skip the payload check and add a condition:

alias: MQTT listener example without payload filter
description: ""
trigger:
  - platform: mqtt
    topic: /rflink/msg
condition:
  - condition: template
    value_template: >-
      {{ trigger.payload == "20;C8;EV1527;ID=0b5be2;SWITCH=09;CMD=ON;" or
      trigger.payload == "20;C8;EV1527;ID=0b5be2;SWITCH=09;CMD=OFF;" }}
    enabled: true
action:
  - if:
      - condition: template
        value_template: >- {{ trigger.payload == "20;C8;EV1527;ID=0b5be2;SWITCH=09;CMD=ON;" }}
        enabled: true
    then:
      - service: input_boolean.turn_on
        data: {}
        target:
          entity_id: input_boolean.test
    else:
      - service: input_boolean.turn_off
        data: {}
        target:
          entity_id: input_boolean.test
mode: single

I don't know if the codes are more complex, try using regular expression on the conditions.

Hope this helps

[JacquesdeBruyn]

I have it somewhat working, but I can't split devices apart so it just responds to all of them.

The 20;XX isn't a checksum. It's a counter. Counts up one for every message received. I was hoping that there's a way to ignore that bit like you'd do in CMD on pc by replacing characters with an *

[JacquesdeBruyn]

For clarity, I have 3 wireless PIRs at the moment, going to add more so would like to eventually be able to know which one triggered. As these are going to be moved around as a sort of cheap security against theft in our vegetable garden.

[crazyserver]

So I suggest you to investigate with template conditions and jinja templates, using regular expressions it's your solution.