RM520N-GL error retrieving ADB key

IoT Modules 5G Module
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1

I encountered the error shown in the image, please help me.

Image_20250724203550
Image_202507242035501080×2316 211 KB

2

I’m having the same problem using the new RM520NGLAAR03A03M4G_A0.301.A0.301 firmware. Has something changed in regards to ADB works now that the firmware supports Secure Boot and Secure Debugging?

If I remember correctly the AT+QADBKEY? command was working fine on the RM520NGLAAR03A03M4G_01.204.01.204 firmware. I don’t see any warnings in the A0.301 release notes about downgrading to 01.204, so I guess that could be an option to get it working? I think the ADB unlock persists even though the firmware has been updated.

3

Dear @TAP_HY @queccy
Due to the latest firmware include security feature, AT+QADBKEY had be removed.

4

What should I do now? Please help me.

5

Dear @TAP_HY
I have sent AT command to you via Message, please check.

6

Dear @silvia,
I also really need to enable the ADB on RM520N-GL, please send me the instructions on how to do it.

ati
Quectel
RM520N-GL
Revision: RM520NGLAAR03A03M4G

OK
AT+QGMR?
RM520NGLAAR03A03M4G_A0.300.A0.300

OK
AT+QADBKEY?
ERROR

Thank you

7

Dear @dg5
I have sent to you in other topic.