https://devzone.nordicsemi.com/f/nordic-q-a/4175/wack-up-of-nrf51822hello everyone, i use nrf51822 and i want to use one switch that wakeup the module from sleep mode. so can i connect switch to gpio of nrf51822 module. if yes than which pin of that. thnxen-USTelligent Community 13Tue, 28 Oct 2014 17:55:14 GMThttps://devzone.nordicsemi.com/thread/14936?ContentTypeID=1Tue, 28 Oct 2014 17:55:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0fdbc053-2d5e-4136-b2f0-a5e0b315f965Asbj&#248;rn<p><a href="https://devzone.nordicsemi.com/documentation/nrf51/6.1.0/s110/html/a00035.html">Basic functionality like this is shown in the code example &quot;pin_change_int_example&quot; in the SDK as well.</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/14935?ContentTypeID=1Wed, 22 Oct 2014 05:09:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a2143925-242a-4bc2-935c-9c754f058367Nguyen Hoan Hoang<p>There 30 i/o in the nRF51822 chip. That depends on which module you are using. You can connect to any i/o pin the module provides you. See your module documentation to which i/o pins are made available.</p><div style="clear:both;"></div>