https://devzone.nordicsemi.com/f/nordic-q-a/57803/regarding-ble-device-connection-problem-with-android-apkHi, We are using nRF51DK for our development, we have developed Android app for Android smart phone. When the Nordic BLE device advertising we are trying for BLE connection with android apk. But most of the times it gets failed to connect.Rarelyen-USTelligent Community 13Sat, 15 Feb 2020 03:50:04 GMThttps://devzone.nordicsemi.com/thread/234509?ContentTypeID=1Sat, 15 Feb 2020 03:50:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f29cefb0-5d1a-471b-9a59-6c1887d1300eArchana Fugare<p>Thank you.</p> <p></p> <p>I have tested with nRF Connect app of Android, and there I am not facing any issue during BLE connection.</p> <p>we will check these points with our Android developer and make changes as per your suggestion and will let you know soon whether issue get resolved or not.</p> <p>Regards,</p> <p>Archana</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/234447?ContentTypeID=1Fri, 14 Feb 2020 14:21:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6122ea1e-dbf2-4bcf-bc8d-2c935e5d72d6Sigurd<p>Hi,</p> <p>Do you see the same issue when testing with&nbsp;<a href="https://www.nordicsemi.com/Software-and-tools/Development-Tools/nRF-Connect-for-mobile">nRF Connect for Android</a> ?</p> [quote user=""]we have developed Android app for Android smart phone[/quote] <p><span>If you are creating your own app you should check out these repos:</span></p> <p><a href="https://github.com/NordicSemiconductor/Android-BLE-Library">Android-BLE-Library</a></p> <p><a href="https://github.com/NordicSemiconductor/Android-Scanner-Compat-Library">Android-Scanner-Compat-Library</a></p> <p><a href="https://github.com/NordicSemiconductor/Android-BLE-Common-Library">Android-BLE-Common-Library</a></p> <p><a href="https://github.com/NordicSemiconductor/Android-nRF-Blinky">Android-nRF-Blinky</a></p> <p><a href="https://github.com/NordicSemiconductor/Android-nRF-Toolbox">Android-nRF-Toolbox</a></p><div style="clear:both;"></div>