Online/Offline availability_topic config for MQTT Switch

Configuration
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1

From version 0.50 MQTT Switch: add availability_topic for online/offline status, but i can not make it work.
I use this configuration for ESP8266 base switch:

- platform: mqtt
  name: 'Office Light'
  state_topic: 'office/light1/status'
  command_topic: 'office/light1/switch'
  availability_topic: "office/light1/available"
  payload_on: "ON"
  payload_off: "OFF"
  payload_available: "online"
  payload_not_available: "offline"

On the ESP 8266 i send birth message and lwt message. But the switch always show “unavailable”

2

make sure your device is sub/pub to the correct topics. Have you checked the logs or subbed to the topic via command line to see if the messages are being sent?

3

Thank you. It is my fault, send wrong topic to the MQTT server.

4

Hi,

I’ve try this but you can share how do this in esp8266.

Thank you for help.

5

Can you share how you have done the MQTT topics on the ESP, I want to implement the same on my ESP Switches too.

Thanks. @dzungpv

6

This is the config, you must send available signal periodically:

  • platform: mqtt
    name: ‘Office Light’
    state_topic: ‘office/light1/status’
    command_topic: ‘office/light1/switch’
    availability_topic: “office/light1/available”
    payload_on: “ON”
    payload_off: “OFF”
    payload_available: “online”
    payload_not_available: “offline”
7

this helps immensely @dzungpv

8

I’m having problem setting up my MQTT Switch. I can see it in HA front end, but it does not execute. I think the problem is with the correct command_topic. Where can I find the correct path?

This is how my config looks like:

  - platform: mqtt
    name: "LED"
    command_topic: "cmnd/sonoffLED/"
    state_topic: "stat/sonoffLED/"
    qos: 1
    payload_on: "ON"
    payload_off: "OFF"
    retain: true

and this is the info of the Sonoff:

MQTT Host 192.168.1.233
MQTT Port 1883
MQTT Client &
Fallback Topic DVES_E724DD
MQTT User pi
MQTT Topic sonoffLED
MQTT Group Topic sonoffs
MQTT Full Topic cmnd/sonoffLED/

9

I had problem with availability too. But I found bug on my side in ESP32 code.

OFFLINE[]=“offlne”
BUGGY: publish(…, OFFLINE, sizeof(OFFLINE), … ) // willl send payload with \0 at the end
OK: publish(…, OFFLINE, sizeof(OFFLINE) -1, … ) // without the \0

I hope it will help somebody, who also will find this topic :slight_smile:

1 Like
10

Take a look at: https://github.com/arendst/Sonoff-Tasmota/wiki/Home-Assistant
Your topics are missing something at the end, probably should be:

    command_topic: "cmnd/sonoffLED/POWER"
    state_topic: "stat/sonoffLED/POWER"

Or maybe POWER1 or SWITCH1, depending on your model.

1 Like