Tasmota, Home Assistant and temperature sensors

Ok, I'm updating this to have it documented. After a few months I've decided to give it another try.

I have Home Assistant running as a docker instance on my Synology NAS.

I have Mosquitto running as a docker instance on my Synology NAS.

I have Tasmota Bluetooth running on a MH-ET ESP32 kit.

I have three Xiaomi sensors flashed with atc1441/ATC_MiThermometer: Custom firmware for the Xiaomi Thermometer LYWSD03MMC and Telink Flasher via USB to Serial converter (github.com).

I have housed the MH-ET ESP32 on a 3D printed case MH-ET LIVE D1 ESP32 mini kit Slim Case by ShadowEcho - Thingiverse

Tasmota configuration:

I've used the Tasmota terminal to issue the command SetOptions19 1 to enable auto-discovery.

I've added Tasmota to Home Assistant but it did not find the thermometers, so after confirming that the messages were actually going from Tasmota to MQTT, @davidcole suggested a snippet to manually add the sensors. It worked so I replicated for the other ones.

In the configuration, ATCd69715 means the ATC sensor with the MAC Address ending in d69715. Note it's case sensitive, so what Tasmota shows on the page is not exactly what it sends in the MQTT topic - make sure it matches.

This is the configuration added:

mqtt:
sensor:
- name: "Tasmota Lounge Temperature"
state_topic: "tele/tasmota_12B560/SENSOR"
value_template: "{{ value_json['ATCd69715'].Temperature }}"
unit_of_measurement: "°C" # "F" if using Fahrenheit
device_class: temperature

- name: "Tasmota Lounge Humidity"
state_topic: "tele/tasmota_12B560/SENSOR"
value_template: "{{ value_json['ATCd69715'].Humidity }}"
unit_of_measurement: "%" # "F" if using Fahrenheit
device_class: humidity

- name: "Tasmota Bella Room Temperature"
state_topic: "tele/tasmota_12B560/SENSOR"
value_template: "{{ value_json['ATC66cdb5'].Temperature }}"
unit_of_measurement: "°C" # "F" if using Fahrenheit
device_class: temperature

- name: "Tasmota Bella Room Humidity"
state_topic: "tele/tasmota_12B560/SENSOR"
value_template: "{{ value_json['ATC66cdb5'].Humidity }}"
unit_of_measurement: "%" # "F" if using Fahrenheit
device_class: humidity

- name: "Tasmota Bedroom Temperature"
state_topic: "tele/tasmota_12B560/SENSOR"
value_template: "{{ value_json['ATCfac2fa'].Temperature }}"
unit_of_measurement: "°C" # "F" if using Fahrenheit
device_class: temperature

- name: "Tasmota Bedroom Humidity"
state_topic: "tele/tasmota_12B560/SENSOR"
value_template: "{{ value_json['ATCfac2fa'].Humidity }}"
unit_of_measurement: "%" # "F" if using Fahrenheit
device_class: humidity

The result:

I have Alexa connected to Home Assistant, and each sensor is assigned to a room, so now I can say, "Alexa, what is the temperature in the Bedroom" and she'll say "The bedroom temperature is ... degrees"

Unfortunately, it is not possible to use these in Alexa routines as I wanted. You need a sensor that can fire events that are then used to trigger the routines, and these sensors only report temperature and humidity but can't be set to fire events.

To that end I might have to get an Amazon Echo Dot 5th Gen with built-in temperature sensor, which does work for routines.

Other people who helped me here: @bartender and @michaelmurfy - thank you folks.

To others in this thread, thanks for your suggestions.

freitasm

freitasm