bluetooth-bed-occupancy-sensor

A raspberry pi positioned under my bed that polls the bluetooth signal strength of my Xiaomi Mi Band and compares it to a predefined threshold. Every 30 seconds the script will publish a message to a mqtt topic updating the state, ie:

{
    "bed_occupied": true
}

In my setup this mqtt message is then picked up by Home Assistant where I use it in a Anti-Snooze feature I built.

Prerequisites

A raspberry pi with:

• git installed
• python3.6+ installed (see https://www.scivision.co/compile-install-python-beta-raspberry-pi/ )
• python3-pip installed

Setup

Clone this repo to your pi

$ git clone https://github.com/KReusen/bluetooth-bed-occupancy-sensor.git

Open the folder, create a virtual environment, activate it and install the requirements

$ cd bluetooth-bed-occupancy-sensor
$ python3 -m venv .env
$ source .env/bin/activate
$ pip install -r requirements.txt

Install bluepy from source

$ sudo apt-get install git build-essential libglib2.0-dev
$ git clone https://github.com/IanHarvey/bluepy.git
$ cd bluepy
$ python setup.py build
$ sudo python setup.py install

Move bluepy module to correct place and clean up the rest

$ mv bluepy/bluepy/ src/bluepy/
$ sudo rm -rf bluepy/

Make bluepy executable with root privileges by any user:

$ sudo setcap 'cap_net_raw,cap_net_admin+eip' src/bluepy/bluepy-helper

[Optional] Add your rollbar token to ~/.bashrc to be able to log errors

export ROLLBAR_TOKEN=abcdefgh

Run

$ cd src
$ python main.py aa:a1:bb:11:22:22