“Pretty basic sensor that sends data to Blynk project to display the status of my garage door - Open of Shut - and sends a push alert to my phone when the status of the door changes - Open to Shut or Shut to Open. I used WEMOS D1 Mini Pro for wifi connectivity and to run the Arduino sketch, but you could use any Arduino compatible devices.
I originally planned on using a simple interlock switch, however the door is an older tilt style garage door and doesnt always open to the same position. Getting a consistant contact would have been difficult. I also rulled out any type of magnetic sensor for the same reason.
I settled on a small Infra-Red (IR) sensor that can detect an obstacle in the range 2-30cm.”