Querying MQTT topic from Tasmota device in template

[mikognn]

I want to add an device field to a script, where the user of that script can provide a Tasmota device as an input, and i then want to query the command_topic attribute from that device somehow, to use it in an MQTT publish action later in that script.

Is this even possible? I do not seem to find any way to query the topic from the Tasmota device (added through the Tasmota integration using auto discovery).

[FloatingBoater (James Derrick)]

Hi,
I’m afriad you’re going to have to break your need down more as it’s not clear enough to help directly.

There’s a few examples of taking MQTT data in from topics, processing, and publishing to MQTT which might help?

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Personally, I use mosquitto_pub & mosquitto_sub in Bash scripts to prototype MQTT actions - can be quicker to test stuff like auto-discovery.

Using The Mosquitto_pub and Mosquitto_sub MQTT Client Tools- Examples

If this helps, this post!

[mikognn]

What exactly is not clear? I have a Tasmota entity, from which i want to get the command_topic attribute “programatically” in a template.

I want to do something like (pseudo code) getMQTTInfo(device_id, "command_topic") or something that achieves the same thing.

Home Assistant obviously has this information, because otherwise it could not communicate with the Tasmota entity. My question is, how do i query the information from Home Assistant inside a template.

Additional Info

• I have a script (a Home Assistant script, that is), that takes an entity as an input
• If that entity is a Tasmota entity, the script should take the attribute command_topic from that entity and proceed
• The script then sends out a MQTT message to that command_topic

YAML Code

alias: Blink Tasmota device
sequence:
  - service: mqtt.publish
    metadata: {}
    data:
      qos: "2"
      retain: false
      topic: {{deviceVar.HOW_DO_I_GET("command_topic")}}
      payload: blink
mode: single
icon: mdi:comment-flash
fields:
  deviceVar:
    selector:
      device: {}
    name: Tasmota device
    description: The device that should blink
    required: true

[francisp (Francis)]

I don’t think you can get the command topic through a template.