MQTT Autodiscovery - not happening :(

[FredTheFrog (Keith)]

Using the RTL_433 add-in and also the corresponding RTL_433-to-MQTT add-in, and I can see the device definition messages in MQTT Explorer (see below) Unfortunately, no devices/entities were ever automagically created from these messages. Is there something missing from the add-in’s device syntax?

homeassistant/sensor/Cotech-367959-121/Cotech-367959-121-UTC/config : {"device_class": "timestamp", "name": "Cotech-367959-121-UTC", "icon": "mdi:clock-in", "state_topic": "rtl_433/b854a4b8-rtl433/devices/Cotech-367959/121/time", "unique_id": "Cotech-367959-121-UTC", "device": {"identifiers": "Cotech-367959-121", "name": "Cotech-367959-121", "model": "Cotech-367959", "manufacturer": "rtl_433"}, "force_update": "true"}
homeassistant/sensor/Cotech-367959-121/Cotech-367959-121-B/config : {"device_class": "battery", "name": "Cotech-367959-121-B", "unit_of_measurement": "%", "value_template": "{{ float(value|int) * 99 + 1 }}", "state_topic": "rtl_433/b854a4b8-rtl433/devices/Cotech-367959/121/battery_ok", "unique_id": "Cotech-367959-121-B", "device": {"identifiers": "Cotech-367959-121", "name": "Cotech-367959-121", "model": "Cotech-367959", "manufacturer": "rtl_433"}, "force_update": "true"}
homeassistant/sensor/Cotech-367959-121/Cotech-367959-121-F/config : {"device_class": "temperature", "name": "Cotech-367959-121-F", "unit_of_measurement": "\u00b0F", "value_template": "{{ value|float }}", "state_topic": "rtl_433/b854a4b8-rtl433/devices/Cotech-367959/121/temperature_F", "unique_id": "Cotech-367959-121-F", "device": {"identifiers": "Cotech-367959-121", "name": "Cotech-367959-121", "model": "Cotech-367959", "manufacturer": "rtl_433"}, "force_update": "true"}
homeassistant/sensor/Cotech-367959-121/Cotech-367959-121-H/config : {"device_class": "humidity", "name": "Cotech-367959-121-H", "unit_of_measurement": "%", "value_template": "{{ value|float }}", "state_topic": "rtl_433/b854a4b8-rtl433/devices/Cotech-367959/121/humidity", "unique_id": "Cotech-367959-121-H", "device": {"identifiers": "Cotech-367959-121", "name": "Cotech-367959-121", "model": "Cotech-367959", "manufacturer": "rtl_433"}, "force_update": "true"}
homeassistant/sensor/Cotech-367959-121/Cotech-367959-121-RT/config : {"name": "Cotech-367959-121-RT", "unit_of_measurement": "mm", "value_template": "{{ value|float }}", "state_topic": "rtl_433/b854a4b8-rtl433/devices/Cotech-367959/121/rain_mm", "unique_id": "Cotech-367959-121-RT", "device": {"identifiers": "Cotech-367959-121", "name": "Cotech-367959-121", "model": "Cotech-367959", "manufacturer": "rtl_433"}, "force_update": "true"}
homeassistant/sensor/Cotech-367959-121/Cotech-367959-121-WD/config : {"name": "Cotech-367959-121-WD", "unit_of_measurement": "\u00b0", "value_template": "{{ value|float }}", "state_topic": "rtl_433/b854a4b8-rtl433/devices/Cotech-367959/121/wind_dir_deg", "unique_id": "Cotech-367959-121-WD", "device": {"identifiers": "Cotech-367959-121", "name": "Cotech-367959-121", "model": "Cotech-367959", "manufacturer": "rtl_433"}, "force_update": "true"}

Even after manually adding the MQTT sensor definitions in configuration.yaml and reviewing the incoming data messages using MQTT Explorer, still nothing appears in the sensor values.

[richt (Rich)]

May have just been me, but I could not get the MQTT configuration in configuration.yaml to work with a separate Mosquitto server. I ended up installing the MQTT integration and cofiguring it to talk to my Mosquitto server.

[FredTheFrog (Keith)]

@richt has nailed it. I never touched the MQTT integration config, but HA had established a full page of settings without every asking for anything. I pointed it to my Mosquitto add-in port number, gave it the correct username and password, and BINGO, it’s receiving MQTT messages.