Could Not enter DFU mode in nrf Beacon

[deepu]

hi,

i have successfully entered the dfu mode many times and could change the applications and reenter the DFU mode.

But then i tried loading the softdevice at "nRF51_SDK_8.1.0_b6ed55fnnn\components\softdevice\s110\hex\s110_softdevice.hex" ,and then it seems i am not able to enter the dfu mode.i am not sure if it is because of this reason as i noticed this issue a bit later after programming the softdevice.

i tried entering the dfu mode with holding the switch pressed and giving the supply.now what i could see is a light orange colour at the LED with very low brightness.

what may be the reason??is it because the softdevice might have got replaced?? i don't think so as both were s110(may be the version is different ) or can it be because of the power supply??

how can i enter the dfu mode again.

please help

[Hung Bui]

@Deepu: How did you load the softdevice ? Did you use DFU mode to update the softdevice or using nRFGo Studio/nrfjprog to flash softdevice using SWD programming interface ? Note that when you flash the softdevice using SWD, the whole chip will be erased. There is no bootloader in it anymore. You would need to use SWD to flash the bootloader in.

If you update the softdevice via DFU bootloader, and if you didn't do DFU for the new bootloader at the same time, you will have issue that the old bootloader is not compatible with S110 v8.0. It only work with S110 v7.x. If it's the case, then you would need to use SWD interface to reflash the chip with S110 v8.0 softdevice, and flash the new bootloader that compatible with S110 v8.0. Same as the above case.

[deepu]

ok it works fine thank you