Serial UART DFU Example failture with Received an error: 0x00000004! message.

RE: Serial UART DFU Example failture with Received an error: 0x00000004! message.

Hung Bui — Tue, 23 Aug 2022 07:38:07 GMT

Hi,

Please try to test again with the flash erased (nrfjprog --eraseall) . I suspect that there was some artifact from the flash of previous firmware that can cause the issue.

Please state the exact bootloader that you flashed on the board.

Have you tried to compile the bootloader and flash the bootloader you compile ?

RE: Serial UART DFU Example failture with Received an error: 0x00000004! message.

jswcomkr — Tue, 23 Aug 2022 03:03:04 GMT

Hi, part number of chip is NRF52832-QFAA

1. Custom hardware. It is connected with Quectel EC21KL LTE Module. I'm developing FOTA through LTE network.(UART)

2. Yes. I used unmodified(already compiled) bootloader, softdevice(S132)

3. I cannot upload anything because it is not working at all. I downloaded only softdevice and bootloader without applications. When I flash the BLE DFU bootloader and softdevice, it was worked. but this time, my device is not working at all(Infinitely rebooting)

RE: Serial UART DFU Example failture with Received an error: 0x00000004! message.

Hung Bui — Mon, 22 Aug 2022 12:41:52 GMT

Hi,

Could you please give more information on:

- Which hardware board were you testing with ?

- What did you flash on the board ? Did you flash the unmodified bootloader ?

- Which .zip file did you use to upload ? Could you also provide the script you used on PC to upload ? Did you use nrfutil or you used nRF Connect Programmer ?