Interfacing a motion sensor

A motion sensor will report a signal when it detects any kind of motion within its range. We can incorporate this into the Raspberry Pi Zero to trigger any kind of event, take a picture, send an e-mail, or turn on a light or motor. Here, we will have our Raspberry Pi Zero understand the incoming signals from a motion sensor.

Getting ready

All you'll need for this recipe besides your Raspberry Pi Zero is an infrared sensor board. The Elego Kit includes one and they are available at many Internet of Things online suppliers.

How to do it...

1. Configure the sensor using the following circuit:
   

2. The code is just as easy as the circuit. Create the motionsensor.py file with the following code:

       #!/usr/bin/env python 
       # Raspberry Pi Zero Cookbook 
       # Chapter 9 
       # Motion Detection 
       import time 
       import RPi.GPIO as GPIO 
     ...