[Solved] Using nrf52dk to flash nrf51 RedBear Nano BLEhttps://devzone.nordicsemi.com/f/nordic-q-a/16533/solved-using-nrf52dk-to-flash-nrf51-redbear-nano-bleNevermind: my problem seems to have been: you need a battery at 3V powering a BLE Nano to program it from a nrf52DK. Original question: I have connected a nrf52DK dev kit board to a nrf51 Nano BLE module. When I make the flash target I get: ERRORen-USTelligent Community 13Tue, 20 Sep 2016 06:57:22 GMTRE: [Solved] Using nrf52dk to flash nrf51 RedBear Nano BLEhttps://devzone.nordicsemi.com/thread/63254?ContentTypeID=1Tue, 20 Sep 2016 06:57:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1fc4e875-4d8d-4f1f-ba6c-10e66a2fd398bjorn-spockeli<p>Yes, you have to provide external power to you BLE Nano as the Debug Out does not supply the external device. You can either use a battery/external supply or power it through a jumper from one of the VDD pins on the DK.</p> <p><strong>Note:</strong> The supply voltage of the external nRF5x must be equal to that of the nRF52 DK in order to program the external nRF5x.</p> <p>-Bjørn</p><div style="clear:both;"></div>