Controller is a software developed based on bluetooth for controlling intelligent rolling shutter doors. Method of use: the hardware electric and open, open the phone bluetooth; According to the prompt, please allow the APP to use the bluetooth of the mobile phone, otherwise the mobile phone cannot search the connected device. After searching the device, select the bluetooth device that needs to be linked. The APP will prompt you to enter the password. Please enter the password of the device. Operations include: book door up/down, close and stop all operation; Modify the name and password of the device; Main functions: to control the smart book door of up/down, close and suspend operation, modify the name and password. Ensure the safety of the users property;