Wire it

PIR sensors and the Pi 3 sometimes don't get along - if you're having false trigger reports, make sure the PIR Sensor is far away from the Pi 3

Connections on Prototyping Pi Plate:

PIR Sensor
  • Red -> 5V
  • Yellow Data -> input 24
  • Black -> Ground
Door Switch
  • One wire to ground, the other to input 23, with a 10k pull-up resistor to 3v3
Indicator LEDs
  • Green connected to output 18 through a 220ohm resistor, will correspond to motion detection
  • Red connected to output 25 through a 220ohm resistor, will correspond to an open magnetic door switch
And of course, some sort of stereo or portable speaker in the 1/8in jack so you can hear it!

That's it! Now on to the code...
This guide was first published on Dec 20, 2012. It was last updated on Dec 20, 2012. This page (Wire it) was last updated on Oct 15, 2019.