README.md

mi-scale-2

Get Xiaomi Mi Smart Scale 2 weight and publishing to mqtt

Tested only on Raspberry Pi 3b + Mi Scale 2

Requirements

• python3
• python-dotenv
• bluepy
• paho-mqtt
• root permission for bluepy.btle

sudo pip install -r requirements.txt

Usage

always run with sudo or from root:

cp .env.dist .env
vim .env
sudo ./main.py
# sudo ./main.py --help
# sudo ./main.py --loglevel=DEBUG

Autostart

sudo cp mi-scale-2.service /etc/systemd/system/
sudo systemctl enable mi-scale-2
sudo systemctl start mi-scale-2

Integrate with Home Assistant

# configuration.yaml:
mqtt:
    sensor:
      - name: "my_weight"
        state_topic: "miscale/qbbr/weight"
        force_update: true
        unit_of_measurement: "kg"
        state_class: "measurement"
        icon: mdi:scale

# customize.yaml:
sensor.my_weight:
    friendly_name: Мой вес

Help

get dev mac address:

sudo hcitool lescan

if u have troubleshoots, try restart u bluetooth/adapter

sudo hciconfig hci0 reset
sudo invoke-rc.d bluetooth restart

Reverse Engineering RAW Schema for Mi Scale 2

!!! slightly different than from openScale wiki !!!

byte 0:

• 0 bit - unknown
• 1 bit - unit kg
• 2 bit - unit lbs
• 3 bit - unknown
• 4 bit - jin (chinese catty) unit
• 5 bit - stabilized
• 6 bit - unknown
• 7 bit - weight removed

byte 1-2:

• weight (little endian)

Links

• https://github.com/oliexdev/openScale/wiki/Xiaomi-Bluetooth-Mi-Scale