https://devzone.nordicsemi.com/f/nordic-q-a/14241/why-i-cannot-set-some-gpio-high-or-lowI just get DK P10040, I am using SDK_11.0.0_89a8197/s132_nrf52_2.0.1_softdevice. I tried ble_app_uart, it works. But I find a problem, I cannot set P0.09/10/12/13 high or low, but other pins can be done. And if I connect probe with P0.13, DK boarden-USTelligent Community 13Mon, 06 Jun 2016 14:22:01 GMThttps://devzone.nordicsemi.com/thread/54389?ContentTypeID=1Mon, 06 Jun 2016 14:22:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bda92e25-2347-4afb-b02b-c7b2f5db110fOle Bauck<p>P0.13 is used for button 1, P0.13 is not used. Take a look at the back of the board, there all the pins that are used are described.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54388?ContentTypeID=1Mon, 06 Jun 2016 07:08:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:aaa8b1f1-ecd9-411e-81d1-604f3ddd8e9efrank zhang<p>Thanks a lot. How about P0.12/13?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54387?ContentTypeID=1Thu, 02 Jun 2016 12:16:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:02299ddf-96a6-4d92-a064-8eb6e4228e1aOle Bauck<p>You will also need to solder a 0 ohm resistor on R27 and R28 to connect P0.09 and P0.10 to the pin header, see schematic in the <a href="http://www.nordicsemi.com/eng/nordic/download_resource/50980/3/78328803">hardware files</a>.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54386?ContentTypeID=1Thu, 02 Jun 2016 11:25:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0cad6384-2d1a-4342-ad3a-0522255cc765Thangaraj<p>Hi Pin9 and Pin 10 are NFC pins You need to disable NFC to use that as GPIO ..</p> <p>Refer:-</p> <p><a href="https://devzone.nordicsemi.com/question/75488/is-any-additional-settings-needed-be-configures-for-gpio9-and-10/">devzone.nordicsemi.com/.../</a></p><div style="clear:both;"></div>