Hello,
we have an RM520N-GL module connected to the NVIDIA Jetson Orin NX via its own carrier board. USB mode works fine, but if the module is switched to PCIe mode, it is not detected by the PCIe subsystem - it is not visible in “lspci”.
So, as a first step, I want to check with you that the mode switching process is correct:
- Default state: 5G module is in USB mode, 4 serial devices created (/dev/ttyUSB0-3)
- Connect via serial terminal to /dev/ttyUSB2
- Send command AT+QCFG=“data_interface”,1,0
- Make sure the configuration is set correctly: AT+QCFG=“data_interface” → is 1,0
- Reset the module via a dedicated pin (or reboot the board, or reset power),
After this, the “lspci” should display the new device (but it doesn’t).
Is this process correct, or am I missing something?