AT commands restoration

Wiz-IO / Arduino-Quectel-BC66

Arduino port for Quectel BC66 LTE Narow Band modules ( OpenCPU based )

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AT commands restoration #5

Closed v8088 closed 4 years ago

v8088 commented 5 years ago

Hi, I cannot restore the AT command support. I made the NVDM backup as recommended before uploading any sketch, but even after NVDM restore the module still runs the sketch and I cannot get the AT commands back. How to restore the AT commands? The module is version BC66NBR01A04

Wiz-IO commented 5 years ago

Hi, This issue is Quectel / OpenCpu issue.... I don`t known real solution, some time this solution work... I ask Quectel - how to? - still waiting ...

second solution - but is your risk - there is button format, then reflash firmware and restore NVDM risk is - you may lose IMEI as zeroes ....

Wiz-IO commented 5 years ago

The solution: https://github.com/Wiz-IO/platform-quectel/wiki/Framework-OpenCPU#how-to-restore-at-command-interface

jaecktec commented 5 years ago

Hey, I am currently also trying to restore my firmware, however I can't flash anything anymore. Probably thats my fault 🙈 however I was hoping you might already have faced this problem:

Category: Tool Issue Error Code: S_BROM_CMD_STARTCMD_TIMEOUT (2006)

My module is labeled BC66NBTEB-04-STD

Wiz-IO commented 5 years ago

Hi Which software you use... Try IoT_FlashTool and look board Key USB/UART If main uart is "OK" the module can not "die"

jaecktec commented 5 years ago

I am using the IoT_FlashTool v2.7.3 and I can see 4 UARTs connected in the device manager (USB to UART Bridge Inteface 0 to 3) It used to work on Interface 0.

I guess you are reffering to the switch on the top left? For me the switch position doesn't make a difference :(

Wiz-IO commented 5 years ago

maybe hardware problem? ask Quectel...