No SWD connection possible with NRF51802https://devzone.nordicsemi.com/f/nordic-q-a/39376/no-swd-connection-possible-with-nrf51802I have problems connecting to a NRF51802 via stlinkv2 and openocd. I also tried a black magic probe flashed onto the blue pill board. Both did not work. I have ordered a NRF51822 module which works flawlessly with both devices. So it seems like this isen-USTelligent Community 13Thu, 11 Oct 2018 16:02:24 GMTRE: No SWD connection possible with NRF51802https://devzone.nordicsemi.com/thread/152549?ContentTypeID=1Thu, 11 Oct 2018 16:02:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a78ba2ee-dec2-4edd-b11b-27f2d487fefdNguyen Hoan Hoang<p>Remove both resistors. &nbsp;The nRF5x already has internal pullups on those pins.</p><div style="clear:both;"></div>RE: No SWD connection possible with NRF51802https://devzone.nordicsemi.com/thread/152495?ContentTypeID=1Thu, 11 Oct 2018 12:35:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5a970075-e300-4157-a2a6-dfcbf378677aketiljo<p>It depends on the programmer. 1 k pulldown on the SWDCLK line is recommended btu down to 500 ohm can be ok of the programmer can handle the drive. I recommend using a larger pulldown.</p><div style="clear:both;"></div>