It should be a piece of cake if you program your Attiny85 chip (not Digispark) using your existing Arduino IDE with the help of one “USB tiny ISP (v2.0)” programmer. The software/Arduino sketch /* * ...

Using motion detectors and an Arduino you can trigger lights, ... The PIR Motion Sensor on the left is made by Parallax and sold by Radio ... flash the on-board LED in front of digital pin 13.

When everything’s plugged in, this is how your Arduino, motion sensor, and power relay should look. Jeremy S. Cook Plug the male-to-female jumper wires into the motion sensor pins.

Using the Arduino Sketch [Eric] has written, you can easily plug in your Wi-Fi information and IFTTT key and trigger. All that’s left to do is put this IoT motion sensor to work by mounting it ...