I went through the same thing recently. The best reference I've ever seen on Android Bluetooth is this series of posts: https://medium.com/@martijn.van.welie/m

I went through the same thing recently. The best reference I've ever seen on Android Bluetooth is this series of posts: https://medium.com/@martijn.van.welie/making-android-ble-work-part-1-a736dcd53b02 https://medium.com/@martijn.van.welie/making-android-ble-wor...