hass.io - Xiaomi Temperature Sensor 2 w/ ESP32

howto.md

Required HW + SW:

• Mi Temperature and Humidity Monitor 2
• ESP32 (flash size min: 4mb) with BT LE
• MQTT
• HASS.IO

Steps: ESP32 + bluetooth firmware: http://ota.tasmota.com/tasmota32/release/tasmota32-bluetooth.bin

Flash to esp https://tasmota.github.io/docs/Esptool/

Setup esp

1. bluetooth (bind_key) https://tasmota.github.io/docs/Bluetooth/#encryption-and-bind_key important step: rule1 on System#Boot do backlog NRFkey ... NRFkey format: https://tasmota.github.io/docs/Commands/#nrfkey

2. mqtt (change topic to specific esp, etc...) https://tasmota.github.io/docs/MQTT/

Add a mqtt.sensor into hass-io configuration.yml https://www.home-assistant.io/integrations/sensor.mqtt/

Example:

sensor:
  - platform: mqtt
    unique_id: xiaomi_temperature_l33t
    name: Mi Temperature
    state_topic: tele/tasmota_btle_L33T/SENSOR
    unit_of_measurement: 'C'
    value_template: '{{ value_json.SENSORKEY.Temperature }}'
    icon: mdi:thermometer
  - platform: mqtt
    ...
    value_template: '{{ value_json.SENSORKEY.Humidity }}'
    ...

Restart hass-io

Check hass-io/config/entities for Mi ... entries

Customize your hass-io dashboard.