MQTT publish in JSON format

Configuration
1

Hello! I’m trying to set the color (to full red) of an internal RGB light of an android tablet. I use the following code but It does not work. All commands should be in JSON format according to the tablet MQTT API documentation

service: mqtt.publish
data:

topic: …/rgb/commands
payload: “{“command”:“SET_STATE”,“value”:“FF0000”}”

When I manually set the state and listen to the topic I got the following:
Message 1 received on …/rgb/events at 8:51 PM:

{
“function”: “RGB”,
“timestamp”: 1643053906517,
“unit”: null,
“value”: “11665424”
}

I tried publishing with a different value (“11665424” instead of “FF0000”) and without escaping, but nothing works.

2

I only use MQTT with zigbee through zigbee2mqtt, so I am not sure if it applies to you, but the topic goes without quotes in yaml. Also, numeric values often go without quotes too. In your example "11665424" could be 11665424. I am pasting a piece of my format, which works, but again I am not sure if this applies to you. Perhaps you can experiment with the syntax based on it?

- service: mqtt.publish
  data:
    topic: zigbee2mqtt/LED Strip Sypialnia/set
    payload: '{"brightness":254,"color":{"x":0.444,"y":0.517},"color_mode":"xy","state":"ON"}'
3

Thanks for the suggestion. Unfortunately It’s not working without quotes

4

Perhaps you can point out the API you have mentioned, so someone who might also be using it will help you?

I would test whether the topic is right, as even capital letter vs non capital makes a difference in my mqtt.publish stuff. Just an idea?

I use MQTT Explorer to test things independently from HA and it really helps to grab nicely what is published.

5

It’s a Zipatile2 (android oreo 8.1) tablet that I’m trying to control locally with my HA server. The API is quite simple and can be found here:

6

This works for me:

  action:
  - data:
      payload: '{"Protocol":"NEC","Bits":32,"Data":"0x44BBD827","DataLSB":"0x22DD1BE4","Repeat":0}'
      topic: IR_bridge/cmnd/IRsend
    service: mqtt.publish
7

I think the issue on my side is that json format is required but I’m not sure how to do it properly