Intro

This project outputs Bluetooth Low Energy (BLE) sensors data in InfluxDB line protocol format. It integrates nicely with the Telegraf execd input plugin.

It exclusively supports CC2540 USB dongles flashed with the HostTest firmware.

Supported sensors

• Xiaomi Thermometers running the pvvx firmware (https://github.com/pvvx/ATC_MiThermometer)
• Xiaomi Body Composition Scale 2

Output

A sample follows.

bluetooth,addr=a4:c1:38:d3:c0:6a,device=mi_thermometer temperature=26.51,humidity=82.69,battery_volt=3.005,battery_percent=89,rssi=-42
bluetooth,addr=5c:ca:d3:ed:7f:27,device=mi_scale weight=64.7,impedance=403,rssi=-57

Installation

Run the unit tests.

go test ./...

Compile for Raspberry Pi.

GOOS=linux GOARCH=arm64 go build -o ble-stats ./cmd

Copy the program and the configuration file to the Raspberry Pi.

Add the Telegraf user to the dialout group.

sudo usermod -a -G dialout telegraf

Create /etc/telegraf/telegraf.d/ble-stats.conf.

[[inputs.execd]]
  command = ["/home/ubuntu/go-ble/go-ble", "/home/ubuntu/go-ble/config.yaml"]
  signal = "none"
  data_format = "influx"