🏋️ Medisana BS444 Scale Integration with ESPHome on ESP32

This component integrates the Medisana BS444 Bluetooth scale directly with ESPHome, so you can track weight, body composition, and more in Home Assistant.

👉 BS430 users should check: ESP32-BLE-Arduino branch

🔧 Setup Guide

1. Add External Component

Option A: Install from GitHub

external_components:
  - source:
      type: git
      url: https://github.com/bwynants/weegschaal
      ref: main
    components: [ medisana_bs444 ]

Option B: From Local Directory

external_components:
  - source: 
      type: local
      path: components

2. Enable BLE Tracker

esp32_ble_tracker:
  scan_parameters:
    interval: 1100ms
    window: 1100ms
    active: false

3. Set Up BLE Client

Replace with your scale’s MAC address:

ble_client:
  - mac_address: "00:00:00:00:00:00"
    id: medisanabs44_ble_id

4. Configure the Scale

Supports multiple scales (just add more MAC addresses). Up to 8 users can be defined. For BS410 & BS444 you need timeoffset: true.

Core Device

📦 Component Configuration

medisana_bs444:
  - id: myscale
    ble_client_id: medisababs44_ble_id
    timeoffset: true 

Sensors

sensor:
  - platform: medisana_bs444
    medisana_bs444_id: myscale
    weight_1:
      name: "Weight User 1"
    kcal_1:
      name: "kcal User 1"
    fat_1:
      name: "Fat User 1"
    tbw_1:
      name: "Water User 1"
    muscle_1:
      name: "Muscle User 1"
    bone_1:
      name: "Bone User 1"
    bmi_1:
      name: "BMI User 1"
    age_1:
      name: "Age user 1"
    size_1:
      name: "Size user 1"

    weight_2:
      name: "Weight User 2"
    kcal_2:
      name: "kcal User 2"
    fat_2:
      name: "Fat User 2"
    tbw_2:
      name: "Water User 2"
    muscle_2:
      name: "Muscle User 2"
    bone_2:
      name: "Bone User 2"
    bmi_2:
      name: "BMI User 2"
    age_2:
      name: "Age user 2"
    size_2:
      name: "Size user 2"

Binary Sensors

Track gender and activity level

binary_sensor:
  - platform: medisana_bs444
    medisana_bs444_id: myscale

    male_1:
      name: "Male user 1"
    female_1:
      name: "Female user 1"
    highactivity_1:
      name: "High Activity user 1"
    
    male_2:
      name: "Male user 2"
    female_2:
      name: "Female user 2"
    highactivity_2:
      name: "High Activity user 2"

add homeassistant time

time:
  - platform: homeassistant
    id: homeassistant_time

support

Confirmed to work with: BS430, BS440, BS444, BS550 Likely compatible with other Medisana Scales

credits

based on reverse engineering from https://github.com/keptenkurk/BS440