Raspberry Pi based SIP doorbell module. This program allows to hook up a Raspberry Pi to a classical door bell/door opener system and SIP capable telephone system (such as a Fritz Box).
It can:
- respond to the door bell button
- ring an external door bell
- call a pre-specified phone number via SIP
- connect an external intercom system to the phone call
- actuate a door buzzer via a PIN code during the call or through a web interface
The SIP capability is provided by the excellent PJSIP library. Before building the program, install the latest version of the library (currently 2.8.0) on your system.