A short text to describe your forum
https://forums.luckfox.com/
I have installed the Dell DW5811e (EM7455) M.2 Cat 6 LTE modem and it is not recognized by the USB hub/host.
Does Pico Pi motherboard (and also the Lyra Pi) support only the Waveshare SIM7600G-H M.2 card ?
The pin definitions, power requirements, and drivers differ among various M.2 4G modules. If the PID of the DW5811e cannot be recognized using lsusb, it indicates a mismatch in the interface or power supply.
I have found the root of the problem, the EM7455 4G modem uses USB3.0 M.2 pins which are not routed on the Luckfox board
(the published Waveshare SIM7600G-H pinout was very helpful). It is possible to switch from USB3.0 to USB2.0 use on EM7455
but my firmware is old and does not support the AT!USBSPEED=0 command. For some reason the firmware update to a more recent
version failed, so i will look for another EM7455-based board with newer firmware version and report on it.