Permissions
 To get access of different devices in terminal, the application must apply the related permission of the device. The permission list:
| Permission | Description | 
| android.permission.CLOUDPOS_PRINTER | access the printer | 
| android.permission.CLOUDPOS_MSR | access the mega stripe reader (MSR) | 
| android.permission.CLOUDPOS_CONTACTLESS_CARD | access the contactless card reader (RF card reader) | 
| android.permission.CLOUDPOS_SMARTCARD | access the smart card reader | 
| android.permission.CLOUDPOS_SERIAL | access the serial port (RS232) | 
| android.permission.CLOUDPOS_LED | access the LED device | 
| android.permission.CLOUDPOS_CUSTOMER_DISPLAY | access the second display device | 
| android.permission.CLOUDPOS_CLONESCREEN | access the HDMI device | 
| android.permission.CLOUDPOS_MONEYBOX | access the cash drawer | 
| android.permission.CLOUDPOS_FINGERPRINT | access the fingerprint device | 
| android.permission.CLOUDPOS_PIN_GET_PIN_BLOCK | retrieve the encrypted PIN block by PINPad | 
| android.permission.CLOUDPOS_PIN_MAC | calculate the MAC by the MAC key in PINPad | 
| android.permission.CLOUDPOS_PIN_ENCRYPT_DATA | encrypt data by the data key in PINPad | 
| android.permission.CLOUDPOS_PIN_UPDATE_USER_KEY | update the session(user) key of MasterKey/SessionKey schema |