https://devzone.nordicsemi.com/f/nordic-q-a/124713/nrf5340-io-pin-controlI modified the blinky sample to toggle io pin 1.05 While the app does compile and the originally led does flaash, I&#39;m unable to control any other io pins. Using NRF5340 NRF SDK V2.6.0 NRF Connect SDK Tool Chain V2.6.2 ubx_evknorab12_ nrf5340_cpuapp&#39; #defineen-USTelligent Community 13Thu, 02 Oct 2025 08:15:37 GMThttps://devzone.nordicsemi.com/thread/550431?ContentTypeID=1Thu, 02 Oct 2025 08:15:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a5474c77-3df1-4f0f-a62e-86da401c18f2DanielNG<p>Hi, nrf_gpio_cfg_output and nrf_gpio_pin_toggle are void functions and do not return anything<br />Please refer to&nbsp;<a href="https://docs.nordicsemi.com/bundle/nrfx-apis-latest/page/group_nrf_gpio_hal.html#gaa417905af0907e63baae651c1679d01a">nrfx: GPIO HAL</a>&nbsp;and&nbsp;<a href="https://docs.nordicsemi.com/bundle/nrfx-apis-latest/page/group_nrf_gpio_hal.html#ga01229c1afac385b135cb5441814de618">nrfx: GPIO HAL<br /><br /></a>Just use it like this<br /><br /><pre class="ui-code" data-mode="text">#define DBG_PIN NRF_GPIO_PIN_MAP(1,5) nrf_gpio_cfg_output(DBG_PIN); // Configure as output pin nrf_gpio_pin_toggle(DBG_PIN); // Toggle the pin</pre></p><div style="clear:both;"></div>