Hello Quectel support team,
I am currently debugging an RG520F-EB module in a Linux/OpenWrt environment and encountered a critical issue after modifying USB configuration via AT commands.
The module now shows the following behavior:
1.USB enumerates as 2c7c:0801
2.Multiple ttyUSB ports appear but none respond to AT commands
3.QMI interface (cdc-wdm0) is present but non-functional (commands hang)
dmesg reports invalid USB interface descriptors
Module:
RG520F-EB
RG520FEBDE-M28-BNX1
P1Y23HH2S003978