After press the upload button,this situation appears?

[Milk]

The way of entering the bootloader mode is sending the command,then run the code as follows:

void jump_to_bootloader(void) { uint8_t softdevice_enabled; uint32_t err_code; err_code = sd_softdevice_is_enabled(&softdevice_enabled); if(softdevice_enabled != 0) { err_code = sd_power_gpregret_clr(0xF0); err_code = sd_power_gpregret_clr(0xFF); err_code = sd_power_gpregret_set(0xA0); sd_nvic_SystemReset(); } }

When the device enters the bootloader mode,so I choice the .zip file to DFU.But when I press the upload button,some situations happen as the pictures present.

Finally,the device ran application again,but I know it DFU failed.

But I do not know why it failed.

[Hung Bui]

Hi Cheese, I saw that you GPREGRET to 0xA0 (set sd_power_gpregret_set(0xA0)) before reset to bootloader. I assume that you modified the bootloader a little bit ? What happens if you try with our bootloader ? and our ble_app_hrs_with_dfu app ? If you can capture a sniffer trace when doing DFU it would be great.