Xiaomi makes Mijia (LYWSD03MMC) & Xiaomi Miaomiaoce (MHO-C401) Smart Bluetooth Thermometer & Hygrometer devices, which are tiny and have very accurate sensors on them. THe default firmware is designed to work with Xiaomi app, but they are hacker friendly.

Two open source contributors atc1441 and pvvx provided an open source alternate firmware which allows the device to transmit their readings over BLE advertisement.

This repo provides a python module (with options to run via docker:adystech/mi_atc_reader) to consume those BLE advertisements and write to other data stores (e.g. influxdb, mqtt)

The configuration (custom.yml) provides placeholders to tag the individual devices with a friendly name, and other tags. Any number of key/value pairs can be provided in the tags and they all will be posted to influx. It also handles InfluxDB push failures, and provides customizable retry buffer. For MQTT it uses Eclipse paho library to interact with mqtt. Tested with Mosquito broker.

It also supports device discovery so that before the devices can be added to config, they can be recognized. Its suggested to use start the python program, and look at the logs for the discovered devices.

- pip install -r requirements.txt
- python mi_atc_reader.py

docker service create --name mi_atc_reader --cap-add NET_ADMIN --mount type=bind,source=custom.yml,destination=/custom.yml adystech/mi_atc_reader

use docker-compose like below

version: '3.8'

services:
atc_reader:
    image: adystech/mi_atc_reader:latest
    volumes:
    - config/custom.yml:/custom.yml
    cap_add:
    - NET_ADMIN
    networks:
    - host_net
networks:
host_net:
    external: true
    name: host

docker stack deploy -c docker-compose.yml mi_reader