https://devzone.nordicsemi.com/f/nordic-q-a/14562/s130-gpiote-and-ble-uart-example-codesToSendTONordic.zip Hi, I am using s130-nrf51822xxa. I tried GPIOTE example and it works fine. I tried ble_uart example and it works.When I try to combine both of them, none of them work. I have attached the code herewith. If I comment out GPIOTE_PARTen-USTelligent Community 13Mon, 20 Jun 2016 12:00:40 GMThttps://devzone.nordicsemi.com/thread/55601?ContentTypeID=1Mon, 20 Jun 2016 12:00:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6b96798a-d1f5-418e-b640-48d26dec5047Ole Bauck<p>Does not work or does not compile? Try to debug the application to see why it doesn&#39;t work, see <a href="https://devzone.nordicsemi.com/question/60125/my-device-is-freezing-and-restarting/">here</a>. The file has two main entries, so that would definitely cause problems. The HFCLK should be started with sd_clock_hfclk_request() when using SoftDevice since NRF_CLOCK is a restricted peripheral, see <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.sds/dita/softdevices/s130/sd_resource_reqs/hw_block_interrupt_vector.html?cp=2_3_0_0_6_0">here</a>.</p><div style="clear:both;"></div>