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nRF51 dk -> problem with programming external nrf51822 board (from china)

Topic last updated 26 Apr 2016, by Philip Freidin. 1 reply
Klemen Grosek
10 Feb 2016

Hi.

So my problem is, that i can not successfully program external board with preprogrammed nrf51822 chip in the board.. This board is from china.. its an ibeacon.. If i unsolder the chinese chip from the board and replace it with the chip from the nrf51 dk dev board (nrf51422) everything works like it should.. I can easy program the external board through P20 connector..

Is it a problem with nrf51822 <> nrf51422?? the same program should work on both chips.?. The program is very small - blinky Or is there a problem, becouse chip from the chinese board is preprogramed and is locked?

Thanks, Klemen

Philip Freidin
26 Apr 2016

The chip is probably locked. You need to do a full chip erase. This will wipe the ibeacon program, so unless you have a copy of it, you won't be able to restore original functionality.