https://devzone.nordicsemi.com/f/nordic-q-a/37039/nrf52-sdk15-0-0-uart-event-questionHi, I&#39;m using nRF52832 with my custom board. (sdk 15.0.0) I changed ble_uart example code, so I can receive GPS data through bluetooth. Now, I have to send GPS data to PC through UART and I succeed in receiving GPS data to my PC and UART app simultaneouslyen-USTelligent Community 13Thu, 02 Aug 2018 01:31:42 GMThttps://devzone.nordicsemi.com/thread/142482?ContentTypeID=1Thu, 02 Aug 2018 01:31:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d1b31073-7ebf-467e-aaa2-8012257672b9Ferrell<p>Thanks for repling and sorry for poor explanation.</p> <p></p> <p>Yes, ble_nus_data_send was the problem!</p> <p>Thanks!!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/142362?ContentTypeID=1Wed, 01 Aug 2018 11:24:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:38a93258-c332-431a-a879-0dc18fcbccd1Susheel Nuguru<p>That is probably because your app is&nbsp;calling&nbsp;ble_nus_data_send inside&nbsp;&nbsp;APP_UART_DATA_READY event handling even though you are not connected and this will return an error. Not sure how you are handling it. I am guessing that you are still getting one&nbsp;APP_UART_DATA_READY event and nothing after that.&nbsp;</p> <p>I cannot see your code but you need to put a condition around&nbsp;ble_nus_data_send to send BLE data only when in connection and not otherwise.</p><div style="clear:both;"></div>