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LGA DevKit+EXS82-W start application "Unknown error" problem. And what is at^susrw ? | Telit Cinterion IoT Developer Community

June 24, 2021 - 11:27am, 12883 views


I am currently working on module EXS82-W together with LGA DevKit, driver is Ubuntu 20.04. After setting up software environment required and check the firmware, I started to manage embedded applications.

I follow the user guide of SDK, build the application, generate the application root of trust and sign it to the application, verify it, download the signed application to the target. Then, I opened another terminal window to start listening. But when I tried to start the application, it always shows "Unknown error, failed!" (as the sceenshot shows).

I have tried many different ways,

1) Go through and Ctrl+f find this error, it didn't mention; but very interesting thing is there is a line in

if c.send('at^susrw=1,"A:/' + sargs.APPNAME + '.bin"') == STATUS_KO:

this AT command, I couldn't find any related infomation online or from the EXS82 ATC document.

2) Change to the other application, helloworld, logging... still the same problem

3) Change the module, still the same problem

4) Thinking maybe it's because the FW is newer than the one in the archive, so we "updated" back to 118 from 124, new problem is when I type lsusb in terminal window, it's not Cinterion but Qualcom, and it couldn't connected, only port /dev/ttyUSB0

5) Check .bin file's permission, enable it, but still same error.

I'd appreciate any kind of help.

Thank you and best regards,