https://devzone.nordicsemi.com/f/nordic-q-a/20922/my-nrf51822-is-is-only-advertising-but-it-is-not-communicating-with-the-controllerHi all, I am using NRF51822 Bluetooth, which I am interfacing with the my microcontroller UART. when I dump the code into my Nordic NRF51822 BLE then it is only advertising but not communicating with the microcontroller. I dumped Softdevice and programen-USTelligent Community 13Thu, 30 Mar 2017 12:00:28 GMThttps://devzone.nordicsemi.com/thread/81725?ContentTypeID=1Thu, 30 Mar 2017 12:00:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8e95fdfa-3b6c-4212-84f3-ccacafffe292Hung Bui<p>Have you tested your application on communicating with your microcontroller ? (no BLE just UART)</p> <p>I would suggest to test with the ble_app_uart example where we use both BLE and UART (forwarding what received on UART to BLE).</p> <p>Is there any different between the working system and the other systems?</p> <p>What exactly happens on UART ? do you get any assertion ? Have you used logic analyzer to check what transmitted on the UART pins ?</p><div style="clear:both;"></div>