rpi-ble-services

Readable BLE service for Raspberry Pi

Sets up a BLE service that provides air quality sensor data as characteristics. Reads an sds011 particulate sensor over USB serial.

Usage

From scratch (empty SD card)

1. Start with latest Raspbian image

2. Use Etcher to flash the image to disk (or dd why not)

3. Add a known network to the wpa_supplicant.conf file so you can connect via SSH: ẁpa_passphrase SSID PASSWORD >> /media/USER/UUID/etc/wpa_supplicant/wpa_supplicant.conf

4. Enable SSH on the system by adding an empty filed named "SSH" into the boot partition: touch /media/USER/boot/SSH. Pop the SD-card into the Raspberry Pi, power it up, and join the same Wifi network, ssh [email protected]. Consider changing the password for the pi user.

5. On the Pi, do

sudo apt-get update
sudo apt-get upgrade

5. Install git sudo apt-get -y install git

6. Install Node (ARMv6 arch for Rpi) from https://nodejs.org/en/download:

wget https://nodejs.org/dist/v6.10.3/node-v6.10.3-linux-armv6l.tar.xz
tar -xvf node-v6.10.3-linux-armv6l.tar.xz
sudo cp -r node-v6.10.3-linux-armv6l/{bin,include,lib,share} /usr/local
rm -rf node-v6.10.3-linux-armv6l

7. Install Redis: sudo apt-get install redis-server It will be used by the local MQTT broker, which decouples the sensors from the BLE service app.

8. Install dependencies: npm install. This will take a loong time on the RPi Zero W.

Run service: npm start

Run the BLE service always (at startup)

We'll use pm2 to start up, monitor, and restart the app if needed. Install it: sudo npm install -g pm2

Start the app (need to sudo to use Bluetooth) under pm2: sudo -E pm2 start index.js --name ble-services

Generate startup script: sudo -E pm2 startup, and save the list of running apps: sudo -E pm2 save,