Can add infrared sensor. When the infrared meet obstacle, the motor stop
operating and the door is no running When the shutter door moving up and
infrared meeting obstacle, the shutter door stop.When the shutter door moving
own and infrared meeting obstacle,the shutter door according to the dialer response
action( Dialer in infrared sensor) Can set up stop, rebound times is 0. 5 /2s/to up limit
mode when meet obstacle(on the module setting).