i have module em7430, OEM dell dw5816e, connect to PC with USB 3.0 converter i have flash the Generic firmware, and it work fine. After that, i am working to make it work with my current country cellular, so i try to change VID:PID, IMEI and USBCOMP with AT command as bellow: AT!USBVID=1199 AT!US…

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…

i have em7355 module and it work fine , showing 3 ttyUSB0,1,2 even no driver or anything else installed

maybe my module are broken after that PID change, i was thought about order new one with my local ecommerce shop :smile:

seems same issue as this one [image] MC7455 stuck in MBIM-only USB composition MC/EM Series So the only solution was to try the tools you sent to me… And it worked! That’s really great job! I let you decide whether it’s worth sharing, as far as I’m concern I keep it safe …

Yes, looks like exactly the same issue. I don’t have any better idea than what’s discussed in the discussion you linked to. My last post there includes a link to a .nvu file which might fix the problem. Or make it worse. All warnings are still applicable.

i will try to flash this .nvu and give you the result i get. but anyway i have ordered the new module and stick with verified vid:pid.

@jyijyi @dl5162 Thanks you so much for helping me with helpful advise. Have good day !

Thanks for sharing that procedure. It helps a lot in case anyone else hits this issue. And great to hear that you were able to rescue your modem. I do find it amazing that this config, made by a tool I hacked together based on reverse engineering .cwe and .nvu files, is able to fix a problem like…

yeah, hope it help anyone-else who need. em74xx are very widely used

Hello, I also have a 4g module of dw5816e. I want to flash it to the latest universal firmware. I have been researching it for many days and have not been successful. Can you list more detailed flashing steps?

Em7430 no com port after vid:pid change

IoT Modules MC/EM Series

phucha August 7, 2023, 2:52am 24

well, i have flash your .nvu with lastest generic .cwe. still cannot fix this problem. so i have brick this module. good bye 8$

EM7455 stuck with no tty nor cdc-wdm devices

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Em7430 no com port after vid:pid change

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