Students' attendance is recorded by crossing the smart gate, and if the smart card is lost or forgotten, Calltech enables the school it has two options attendance through the web app or mobile app

It passed the student through the smart card from the smart gate so that the smart gate issued a green light indicating the success of the process. But if the smart gate issued another color, this shows that the login process was not successful, you can see several cases in which the smart card is not successfully read when crossing The student through the smart gate.