https://devzone.nordicsemi.com/f/nordic-q-a/39091/nrf52840-gpio-setting-questionI wnat to set P0.30 and P0.31 for I2C CLK and SDA. nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(false); err_code = nrf_drv_gpiote_out_init(30, &amp;out_config1); APP_ERROR_CHECK(err_code); err_code = nrf_drv_gpiote_out_init(31, &amp;out_config1en-USTelligent Community 13Tue, 02 Oct 2018 06:42:14 GMThttps://devzone.nordicsemi.com/thread/151105?ContentTypeID=1Tue, 02 Oct 2018 06:42:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9d91dbae-5456-4aa5-81cd-9e1041679d61Einar Thorsrud<p>Hi,</p> <p>Why are you bit-banging I2C instead of using the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.ps/twim.html?cp=2_0_0_5_30">TWIM peripheral</a>? I recommend you&nbsp;use the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.2.0/hardware_driver_twi.html?cp=4_0_0_2_0_17">TWI master driver</a>, and refer to for instance the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.2.0/twi_sensor_example.html?cp=4_0_0_4_5_43">TWI Sensor Example</a>.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/151101?ContentTypeID=1Tue, 02 Oct 2018 06:21:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7555ed2e-c692-4b06-91ad-bd9d212fbd47Ray Chiou<p>I set GPIO for input is OK.</p><div style="clear:both;"></div>