I got this annoying problem - my cable modem start acting weird after a while. So I wanted to setup cron job to restart it sometimes around 3am each day, but the problem is - there is no SSH or any kind of API access. But there is admin panel where you can click "Reboot" button. To solve this problem I used Zombie.js module:

sudo npm install zombie -g

and wrote small script to login into admin interface and click Reboot button: