https://devzone.nordicsemi.com/f/nordic-q-a/6048/nrf51822-gpio-pin-p0-26-and-p0-27-unavailable-with-softdeviceHi all, I have a working prototype of a service which enables a number of characteristics for the control of motors and relays. The motors work great, and are controlled using GPIO to an h-bridge. I went to add the switches in exactly the same manneren-USTelligent Community 13Sat, 14 Mar 2015 01:49:30 GMThttps://devzone.nordicsemi.com/thread/21149?ContentTypeID=1Sat, 14 Mar 2015 01:49:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ca9fff21-33b6-45c6-962d-bb82986b5e06chalecampb<p>Oh! Good call. I forgot I had switched from the reference design to the DK pinout for the prototype, so it showed as available on the DK interface. I will just reroute those.</p> <p>Thanks! -Alex</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/21148?ContentTypeID=1Sat, 14 Mar 2015 00:28:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:530380d7-7b39-44db-b882-8b3ec2f5ab44RK<p>Look at the circuit diagram / product specifications. GPIO 26/27 are shared by the 32kHz crystal so if you have a 32kHz crystal, those GPIOs are unavailable.</p><div style="clear:both;"></div>