EM7455 not recognised anymore after usbmode change

[jyijyi]

Why don’t you change the mode by “AT!USBCOMP?” ?
I am not sure if those perl script is officially supported…

BTW, does this help?

Em7430 no com port after vid:pid change

Some idea like this one: I also see the qcserial.c in MBPL usb driver where you might add your pid: [image]

Em7430 no com port after vid:pid change

oh god, i did fix this by many many wierd steps on both Windows10 and Ubuntu 20.04, thanks you @dl5162 , this .nvu is helpful to change the pid, so driver and usb bus can be detected, my works are: using physical pc, dont use virtual machine with usb passthrough because the vm host will not detect usb bus without driver Clean the hardware, m2 pin, m2 adapter pin to avoid pin missing or short must know the device usb setting, i remember it was 3 so i plug it on usb 3.0 port Plug in on windows 1…