BLE connection problemhttps://devzone.nordicsemi.com/f/nordic-q-a/23478/ble-connection-problemHi, I&#39;m using nrf51822 and ble_app_uart in SDK12.3. Testing with android app nRF UART v2.0 I have some problem with BLE connection. First, Sometimes when I tried to connect over BLE, connection failed with &quot;RX Service Not Found&quot; in androiden-USTelligent Community 13Fri, 14 Jul 2017 01:56:20 GMTRE: BLE connection problemhttps://devzone.nordicsemi.com/thread/92222?ContentTypeID=1Fri, 14 Jul 2017 01:56:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e105c14a-acb4-4fce-af2e-6d7ff292b3e7DragonAnger<p>Thanks a lot! I&#39;m trying to using nRF-Toolbox but it&#39;s hard to understand.</p><div style="clear:both;"></div>RE: BLE connection problemhttps://devzone.nordicsemi.com/thread/92221?ContentTypeID=1Thu, 13 Jul 2017 08:56:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:24af4b2c-c296-40e4-b006-d725f2f67f54Sigurd<p>Hi,</p> <p>The old UART 2.0 app is deprecated (over 3 years since last update). I strongly recommend using the <a href="https://www.nordicsemi.com/eng/Products/Nordic-mobile-Apps/nRF-Toolbox-App">nRF-Toolbox app</a>, and use the UART function there instead.</p><div style="clear:both;"></div>