Configuration of GPIO pins on Port 1 doesn&#39;t workhttps://devzone.nordicsemi.com/f/nordic-q-a/57579/configuration-of-gpio-pins-on-port-1-doesn-t-workHey.. I&#39;m having difficulties using P1 pins for UART. I just changed the blinky example for checking the P1 pin changes with it. But no changes where monitored as expected. I think the P1 configuration using NRF_GPIO_PIN_MAP isn`t set.en-USTelligent Community 13Mon, 10 Feb 2020 09:49:18 GMTRE: Configuration of GPIO pins on Port 1 doesn't workhttps://devzone.nordicsemi.com/thread/233470?ContentTypeID=1Mon, 10 Feb 2020 09:49:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:55e06497-ac51-4d6c-845b-acbfd410ff46Kenneth<p>Looking at the code I can see that&nbsp;nrf_gpio_pin_set(SER_APP_RX_PIN); will only run for a few microseconds. Likely better to try:</p> <p>{<br />bsp_board_led_invert(i);<br /> nrf_gpio_pin_clear(SER_APP_RX_PIN);<br /> nrf_delay_ms(1000);<br /> nrf_gpio_pin_set(SER_APP_RX_PIN);<br /><span>nrf_delay_ms(1000); // Add this<br /></span>}</p> <p>OR</p> <p><span>{</span><br /><span>bsp_board_led_invert(i);</span><br /><span>nrf_gpio_pin_toggle(SER_APP_RX_PIN); // Similar to invert.</span><br /><span>nrf_delay_ms(1000);</span><br /><span>}</span></p> <p><span>Kenneth</span></p><div style="clear:both;"></div>