Arduino Optical Gate Chat Control

Optical gates are basicly an infra LED and photo sensor facing eachother. If infrawave is sensed then the optical gate is open. It is closed otherwise. If everything functions normally a closed optical gate means something is blocking the space between the infra LED and photo sensor. They are widely used for counting objects.

You can chat with the device at the Ozeki 10 as the video shows below.

Possible commands