Hi Then, On Wed, Feb 15, 2017 at 10:58:57AM +0800, then yon wrote: > After i tried on 3 NRF52_DK board, 1 of it worked! > > This is really weird as the other 2 units only work if i disabled the > filesystem. > > Do you have any clue on this?
I wonder if the flash is corrupt somehow. There were some backwards-compatibility-breaking changes to the boot loader and flash maps between 0.9.0 and 1.0.0-b2. I would try erasing the flash entirely on one of the boards, then upload the boot loader and image again. I wouldn't expect these symptoms from flash corruption, though... Chris
