Help! UMTS & LTE EVB Kit with BG96 blocks COM ports after reset and hang up

IoT Modules LPWA Module
1

In UMTS & LTE EVB Kit with BG96:

  • I was following development steps modifying a GPS example, compiling code and upload with QEFS Explorer,

  • I reset by button and platform hang up, like going sleep, and now it’s not possible flash again, it only appears 1 USB port (DM port) but it’s not possible to flash again, QEFS explorer hangs and exit.

  • I have tried again long reset, three times reset and I with in device manager likes appear 3 ports and inmediately disappear and only one remains (DM)

Any trick to reset completely flash or access by DM port? I’m desperate.

2

Hi my friend ,

you module crashed , caused by you APP code ,

for now , pls using Qflash reburn the fw version to del your APP
https://cnquectel-my.sharepoint.com/:f:/g/personal/america-fae_quectel_com/ElJcxWhK5qFAkPk5IOf0r80BpzzsRYtIgk0r0YWRvczoRA?e=JzmJyp

for debug your issue ， pls collect dump log for more analysis.

https://cnquectel-my.sharepoint.com/:f:/g/personal/america-fae_quectel_com/EmuR9cKm_7FNqtsO37DOVw8Bv-MI-8k6gq3UDLNpR1-WAg?e=E9h99D

for more detail ,pls email to support@quectel.com

3

Hi
Reflash module…
if you have problems with reflashing & DM port … the small board with module have control point USB BOOT
connect this point with VDD_EX ( 1.8v ) with 1k resistor, power ON and select new com port … reflash

4

This is my log:
https://unexes-my.sharepoint.com/:u:/g/personal/josan_unex_es/Ef6rFvW5uw9GvkppGbMav5ABIjpQsvnnD4kvmoC0nnKdjw?e=4DYfaC

5

HI again Stephen,
I don’t have the version of the firmware to reburn, I don’t see it included in the QflashV_4.15 package for BG96?

6

Thanks, but now the main problem is obtain the firmware and try reburn. I 'm waiting to Quectel support contact me 3 days ago
to obtain it.
I have localized USB_Boot_Pin if it’s necessary

7

Hi Josan。

pls download Qflash tools with below link ，

https://cnquectel-my.sharepoint.com/:f:/g/personal/america-fae_quectel_com/ElJcxWhK5qFAkPk5IOf0r80BpzzsRYtIgk0r0YWRvczoRA?e=GYC7BR

anymore issue ， pls send email to support @quectel.com or stephen.li@ quectel.com

Forum is not good place to resolve all the issue .