Quectel UC20 User Manual page 15

 /dev/ttyUSB4
You can check the result in the terminal, using the following command
#ls /dev/ttyUSB*
If the five device node files are listed, it is certain that the UC20 module has been recognized by
Linux/Android OS. And the corresponding relations to the interfaces of the devices are shown as below:
Table 2: Relationship between Interfaces and Devices
INDEX Interface Name
0 DM interface
1 NMEA interface
2 AT interface
3 Modem interface
4 NDIS interface
UC20_Embedded_Linux_USB_Driver_User_Guide
UC20 Embedded Linux USB Driver User Guide
Device Name
/dev/ttyUSB0
/dev/ttyUSB1
/dev/ttyUSB2
/dev/ttyUSB3
/dev/ttyUSB4
Confidential / Released
UMTS/HSPA Module
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