We have an nRF52 DK and have developed a customer board. On the custom board we have a header with pins for power, ground, clock, and data.
When I connect this to the nRF52 DK according to information here I can program the custom board, most of the time. However, periodically, it will act as though it programmed but the firmware does not run. I have tried this from J-Link and SES.
I have a contractor doing some design for me, and he tells me that we also need to disconnect power from the nRF52 chip on the DK before we program, but I can find nothing about this on this site, and I prefer not to make changes to this dev kit.
I am looking for some guidance because, when we go into production we are going to need to program these devices on the custom board successfully every time. As it stands I often times have to reprogram it 10 or 12 times before it works.
I am sure that it is not a lose connection or something not connect properly as i have checked this many times.
Any assistance would be appreciated.
Bill Westlake, SE, Unified Business Technologies
