Siren when internet is ON after an outage or vice versa. I wrote this when my internet fibre was broken and my ISP took 35 hours to fix it. I was looking at the router's LED in a cronjob of 20 seconds interval that is why I thought to write it. So, thought why not put it in Github too :P
sudo apt install python3
sudo apt install pip3
Install the requirements from requirements.txt
run the script internet_check.py with screen for background as :
screen python3 internet_check.py