https://devzone.nordicsemi.com/f/nordic-q-a/8952/interrupt-when-signal-is-low-to-highI have a project, where I try to trigger an interrupt when I get a low-to-high tranistion and high-to low transition. My setup: -nRF51DK -SDK8.1 -SoftDevice 8.0 #define low_to_high 25 #define high_to_low 28 Both are defined as inputsen-USTelligent Community 13Sun, 30 Aug 2015 02:11:43 GMThttps://devzone.nordicsemi.com/thread/32972?ContentTypeID=1Sun, 30 Aug 2015 02:11:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bdb2abc3-9fc6-43da-8df5-55a3ac73acb2RK<p>You have &#39;BUTTON_PULL&#39; in your button config for both buttons, and that&#39;s pullup for the DK, so that&#39;s overriding your setting of PULLDOWN for the pin. Pin 25 == P0.17 == button1 on the board.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/32971?ContentTypeID=1Sat, 29 Aug 2015 08:13:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:57769261-34c0-43a8-889b-738d6d2e5f27Inspectron<p>Nothing is connected to PIN 25. To simulate a low/high signal on the PIN, I have wires soldered on VDD and GND. I press them on the PIN, when I need a high/low signal</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/32970?ContentTypeID=1Fri, 28 Aug 2015 15:41:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c0f004e2-1be5-4593-914a-3b29ab30fd5dAlex<p>What is connected to Pin 25 and how? Is it possible that you assigned to that pin another peripheral?</p><div style="clear:both;"></div>