A version of https://github.com/balena-io/wifi-connect/blob/master/scripts/start.sh for raspberry pis

start.sh

#!/usr/bin/env bash

# export DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host/run/dbus/system_bus_socket
# ^^^ this can cause barfing and isn't needed

# 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?
sleep 30s
iwgetid -r

if [ $? -eq 0 ]; then
    printf 'Skipping WiFi Connect\n'
else
    printf 'Starting WiFi Connect\n'
    wifi-connect -o 7777
fi

# Start your application here.

I tried using the instructions in your blog post for Ubuntu, and it required a few tweaks:

• wireless-tools is not installed by default, so I had to run sudo apt install wireless-tools
• The wifi-connect script was being run before the system was able to form a wifi connection, so it was being reset every boot. Adding ExecStartPre=/bin/sleep 10 to the service configuration fixed this problem.
• The path to file should use /home/ubuntu instead of /home/pi when using Ubuntu instead of Raspian

Otherwise your blog post was very helpful!

Thank you! I've updated it to add in a delay (and also I'm running it on a different port).