Hi,
I'm having some troubles with the Thingy:91 because it became unresponsive after I flashed the device with the mqtt_sample firmware.
I built the mqtt_sample with segger embedded studio, then I flashed the merged.hex output file using an external programmer (J-Link EDU Mini) through segger embedded studio.
Now the device is completely dead: If I try to flash the asset tracker application with MCU Boot using USB cable it completes the flashing procedure but then nothing happens, no led flashing and no debug output on LTE Monitor.
Also I'm not able anymore to connect the J-Link with the target (neither with Segger J-Link tools or with Nordic tools).
If I try
nrfjprog -f nrf91 -ri receive the following output:
ERROR: JLinkARM DLL reported an error. Try again. If error condition ERROR: persists, run the same command again with argument --log, contact Nordic ERROR: Semiconductor and provide the generated log.log file to them. NOTE: For additional output, try running again with logging enabled (--log). NOTE: Any generated log error messages will be displayed.
Have I done something wrong? Which is the correct procedure to make the device work again?
Thank you very much,
Grein