Very simple buzzer system.
It does two very simple things:
- It connects to a phone modem, and when a phone call is received, if the lock is open, it opens the door by dialing 9
- Simple web page that allows you to control the status of the lock and shows you the last 10 entries.
- Raspberry Pi (or anything to run this project)
- A connected phone modem
I ended up using pm2 to auto start the server on a raspberry pi.