What conditions cause OP_CODE_SYS_RESET to get sent during DFU?

[Akbar Dhanaliwala]

Hi, I'm testing doing a soft device update (v7.0 to v7.1) over DFU, but I consistently get OP_CODE_SYS_RESET sent to my device after 4 packets(80 bytes), at which point the update fails. I'm using an Android device using nRF Toolbox v1.4 to perform the update. I'm curious what would cause the android device to send that op code. thank you, akbar

[Hung Bui]

Hi Akbar,

Could you let me know which bootloader you are using (SDK version) ? Could you capture a sniffer trace of your DFU process ?

Android app will send that reset command (0x06) if the DFU is not in correct state. I would need to have a look at the trace to know what would be wrong.

[Hung Bui]

Hi Akbar,

I assume that you are using the experimental bootloader included in the SDK v6.0. The official version in SDK v6.0 doesn't support Softdevice update. I would not suggest to use the experimental version on V6.0 but to switch to the offical bootloader version in SDK v6.1.

Please try with SDK v6.1 and let me know the result.