tecno4

Previously, we coupled an Arduino and an ESP8266 module to send an email when a temperature threshold is met. This time we are going to make the pair send an SMS when a PIR sensor detects motion.

In this lesson you will learn how to use a PIR movement detector with an Arduino and to have the Arduino communicate with a Python program running on your computer to send an email whenever movement is detected by the sensor.
The Arduino is the heart of this project. It 'listens' to the PIR sensor and when motion is detect, instructs the computer via the USB port to send an email.