I've set the dev kit jumpers exactly as described for the "changing advertising method" example. I've compiled the code for the target DA14531. Keil then says "No Cortex-M SW Device Found".
So I switched to the iBeacon example. I made no changes at all to the hardware. This example uploads and runs fine. That's a bit strange.
Same problem with the "advertising service data" example. It just won't work.
Can anyone shed any light on this?