What is it?
BLE Scale Sync is a headless CLI tool that reads weight and impedance from BLE smart scales and
syncs body composition data to multiple targets. No phone app needed. Runs on a Raspberry Pi,
Docker, or any machine with Node.js.
Website: blescalesync.dev
GitHub: KristianP26/ble-scale-sync
Home Assistant Integration
MQTT with auto-discovery. Once connected, 10 sensors appear automatically:
- Weight, BMI, Body Fat %, Muscle Mass, Body Water %
- Bone Mass, Visceral Fat, BMR, Metabolic Age, Protein %
- LWT availability tracking (online/offline)
Each user gets their own set of sensors (e.g. sensor.scale_kristian_weight,
sensor.scale_anna_body_fat).
Supported Scales
23 brands out of the box: Xiaomi Mi Scale, Renpho, Eufy, Yunmai, Beurer, Sanitas, Medisana,
Silvercrest, 1byone, Etekcity, Arboleaf, Lepulse, Fitdays, and more. Full list on the website under
Supported Scales.
Export Targets
| Target | What it does |
|---|---|
| MQTT | Home Assistant auto-discovery, 10 sensors per user |
| Garmin Connect | Automatic body composition upload |
| Strava | Automatic athlete weight sync |
| InfluxDB | Time-series storage for Grafana dashboards |
| Webhook | POST JSON to any endpoint |
| Ntfy | Push notifications on each measurement |
| File | Local CSV or JSONL logging |
All exporters run in parallel. Multi-user support with automatic weight-based identification and
per-user exporter config (e.g. each family member syncs to their own Garmin account).
ESP32 BLE Proxy
No Bluetooth on your server? A cheap ESP32 board (~8€) sits near the scale and relays BLE data over
WiFi/MQTT. The server needs no Bluetooth adapter at all. This simplifies Docker deployment: no
NET_ADMIN, no D-Bus mounts, no group-add. See the ESP32 Proxy guide on the website.
Quick Start (Docker)
The Docker image is on GHCR under ghcr.io/kristianp26/ble-scale-sync:latest. Run setup for the
interactive wizard, then start with CONTINUOUS_MODE=true. Full Docker commands and compose
examples are in the Getting Started guide on the website.
The setup wizard walks you through scale discovery, user profiles, exporter selection, and
connectivity tests.