OpenBalena - WiFi Connect & Node-Red

docker-compose.yml

version: '2.1'

services:
  wifi-connect:
    build: ./wifi-connect
    network_mode: "host"
    labels:
        io.balena.features.dbus: '1'
    cap_add:
        - NET_ADMIN
    environment:
        DBUS_SYSTEM_BUS_ADDRESS: "unix:path=/host/run/dbus/system_bus_socket"
        PORTAL_SSID: 'My custom AP'
        PORTAL_PASSPHRASE: 'myCustomAPPassword'
        BALENA_ARCH: rpi
        BALENA_MACHINE_NAME: raspberry-pi
        
  node-red:
    build: ./node-red/node-red
    volumes:
      - 'volume-data:/data'
    restart: always
    privileged: true
    network_mode: host
    labels:
      io.balena.features.supervisor-api: '1'
    cap_add:
      - SYS_RAWIO
    devices:
      - '/dev/mem:/dev/mem'
      - '/dev/gpiomem:/dev/gpiomem'
      - '/dev/i2c-1:/dev/i2c-1'
    ports:
      - 1880:80

volumes:
  volume-data:

Dockerfile.template

FROM balenablocks/wifi-connect:%%BALENA_ARCH%%

COPY ./scripts/start.sh .

start.sh

#!/usr/bin/env bash

export DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host/run/dbus/system_bus_socket

# Optional step - it takes couple of seconds (or longer) to establish a WiFi connection
# sometimes. In this case, following checks will fail and wifi-connect
# will be launched even if the device will be able to connect to a WiFi network.
# If this is your case, you can wait for a while and then check for the connection.
# sleep 15

# Choose a condition for running WiFi Connect according to your use case:

# 1. Is there a default gateway?
# ip route | grep default

# 2. Is there Internet connectivity?
# nmcli -t g | grep full

# 3. Is there Internet connectivity via a google ping?
wget --spider http://google.com 2>&1

# 4. Is there an active WiFi connection?
#iwgetid -r

if [ $? -eq 0 ]; then
    printf 'Skipping WiFi Connect\n'
else
    printf 'Starting WiFi Connect\n'
    ./wifi-connect -s $PORTAL_SSID -p $PORTAL_PASSPHRASE
fi

# Start your application here.
sleep infinity