Sensors turn to unknown state when i restart Home Assistant

Configuration
1

Hello guys!

I have a logical board with 32 sensors integrated with home assistant with mqtt, i manually insert to configuration.yaml the entities. all sensors working but when i restart HA all turn state to unknown, the only way to change the state is to restart logical board after restart HA.

Can anyone help?

2

The logical board with 32 sensors is not publishing its payloads as retained messages.

A retained message means the payload is stored on the MQTT broker. When Home Assistant restarts, it connects to the broker, re-subscribes to all required topics, and immediately receives any retained messages. If the topic doesn’t have a retained message, Home Assistant receives nothing and must wait until the next time the board publishes a payload.

Retained Messages - MQTT Essentials: Part 8 (hivemq.com)

Check the board’s documentation to see if it can be configured to publish its payloads as retained messages.

1 Like
3

i have 2 types of sensors binary sensors which confuguration is:

  - name: 'COLB-D8'
    unique_id: COLB-D8
    state_topic: 'COLB/XXXXXXXXXXXXXXX/state'
    value_template: '{{ value_json.D8.on if value_json.D8 is defined else this.state }}'
    payload_on: 1
    payload_off: 0

and sensors

  - name: 'COLB-A1'
    unique_id: COLB-A1
    state_topic: 'COLB/XXXXXXXXXXXXXXXXXXX/state'
    unit_of_measurement: '%'
    value_template: '{{ value_json.A1.value }} '

i try to add retain= true but yaml file dont accept it

4

Because that’s not a valid option for MQTT Sensors and Binary Sensors. It’s also not where you should be attempting to control message retention. You need to configure your 32-sensor board to publish its data as retained messages. Check its documentation to see if it allows you to do that.