AndroidExercises My exercises with Android Start Android for beginners (RU) https://startandroid.ru/ru/ Coding for Android (RU) http://developer.alexanderklimov.ru/android/ How to make an Android application yourself (RU) https://skillbox.ru/media/code/kak_sdelat_prilozhenie_dlya_android/ Making Android BLE work (RU), Mar 23, 2019 https://habr.com/ru/post/536392/ The Ultimate Guide to Android Bluetooth Low Energy, May 15, 2020 https://punchthrough.com/android-ble-guide/