App not starting after dfu buttonless OTA

[hkarthik97]

We have a custom nrf52832 board. We have nearly 260 boards. After uploading the app through DFU app (nRFConnect) , the new application starts to advertise . The application works on few boards and Doesnt work on few boards . But the boards that don't advertise our application  advertise DFUTARG bootloader. And at times the boards that were successfully running application have stopped advertising  now.

Thanks in advance

Lil Urgent please help we are in production

[Vidar Berg]

Hi,

Is it possible to attach a debugger to the failing units and debug the application code? It sounds like it's the application that's crashing, not the bootloader.

[hkarthik97]

Can u help me debug it?

[Vidar Berg]

Of course, but I need more information about your setup first. Is it possible to attach a debugger to your device? In that case, as a start, can you connect it do one of the failing units and run "nrfjprog --readregs", then post the result here? 

[hkarthik97]

My device has a jtag connector option

[Vidar Berg]

Can you connect a debugger to it and run the nrfjprog command?

[hkarthik97]

Any tutorial help or steps to use nrfprog command?