Personal Doorbot

Make your own personal intercom ring using a raspberry pi and python!

• Raspberry pi
• 56K RJ11 Modem

Setup

pip install -r requirements.xt
python answer.py
*/5 * * * * pgrep -f answer.py || nohup python /home/pi/Code/answer.py > test.out

Usage

daemonize the process answer.py for long term usage.

• Currently, it picks up a call
• changes the handset to voice mode
• dials ATD0 making a connection
• Tone Presses a "6"*

You can modify the * section to fit your own code or provide a second factor auth. Cannot get input from the client.

Add daemon to cron for a rapsberry pi via ./setup_cron.sh

vnc server

use a tool such as fling to identify your raspberry pi's ip and SSH into it at pi@<IP>

Shoutouts

• http://pcmicro.com/support/modem_at_commands.html
• https://stackoverflow.com/questions/23532038/read-response-at-command-with-pyserial
• https://www.raspberrypi.org/forums/viewtopic.php?t=112508#p784914
• Huge thanks for DTMF tones article from Pradeep Singh.