https://devzone.nordicsemi.com/f/nordic-q-a/32626/can-nrf-connect-ble-be-configured-to-send-data-to-a-slave-deviceDear friends, The nRF Connect BLE app is connected with a local device acted as Master. The app supports the configuration of the local device&#39;s GATT attribute table, and adding attributes to the server setup allows the local device to exchange dataen-USTelligent Community 13Thu, 22 Mar 2018 13:42:20 GMThttps://devzone.nordicsemi.com/thread/125560?ContentTypeID=1Thu, 22 Mar 2018 13:42:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:836d08c4-b695-43c8-a030-3d3d838bd675Martin Lesund<p>Hello&nbsp;xvhongpeng,</p> <p>&nbsp;I am not sure I understand what you are asking here. Also I see you have a <a href="https://devzone.nordicsemi.com/f/nordic-q-a/32112/can-nrf-connect-be-configured-to-send-data-to-a-peer-device" target="_blank" rel="noopener noreferrer">very similar thread</a>, please stick to only one thread for the same question.</p> <p>&nbsp; Please use BLE terminology Central &amp; Peripheral when you are trying to describe your setup.</p> <p>As I read your question you are using your smartphone as peripheral, and you &quot;configure the GATT server&quot; and you use a nRF device as a client?</p> <p>&nbsp;</p> <p>Anyway, I would suggest you to use &quot;nRF Connect&quot; on your PC that works as a client, then it is easier to see the different services and you can play around with the characteristics.&nbsp;</p> <p>(<em>Also take a look at the&nbsp;<a href="https://devzone.nordicsemi.com/tutorials/b/bluetooth-low-energy" target="_blank" rel="noopener noreferrer">BLE tutorials</a>&nbsp;for additional information about BLE communication</em>)</p><div style="clear:both;"></div>