Issue with serial DFU on NRF52

[Siva]

Hi All,

I am trying to get the serial DFU working with nRF52832 development kit with SDK 13. I am able to get the bootloader flashed and have installed the nrfUtil tool. I followed the exact sequence of the steps mentioned here and got it right until the final step where I am trying to sent the application image to the device. The image transfer doesn't progress from 0% and it finally fails with the below logs:

I did some debugging and found that in the "on_packet_received" function, the device is getting an invalid opcode and so its responding with an error. I also tried disabling the HFC in device and the nrfutil tool as mentioned in this thread with no success. Finally I also tried changing the UART Tx/Rx pins to to P[0].3 and P[0].4 with no improvements.

Please let me know if you have some pointers which would help me in debugging this.

[Hung Bui]

Hi Siva,

It's pretty strange. I just tested on my nRF52DK , I can reset the board right after programming.

Could you make it more clear what you mean LED1 changes and LED 2 LED3 glowing? What exactly was glowing, like lid up bot not solid ?

Do you see that right after you program the bootloader or when you start sending the image ?

Could you include your bootloader file and the .zip file you used ?