I’ve written a door pi software that not only controls

  • Intercom door open function on buzzer detection
  • Kasa Smart sockets  (to control heaters)
  • Infrared smart hoover (coredy R500)

But I’m also working on pulse width modulated audio to play audio file down the line to the person at the intercom.   Actually i have it done, just need to push the PCM code once i have sorted the audio amplification.