I am using Android 5.0.1 Lollipop and developing Bluetooth Low Energy server-client communication. I have Samsung Galaxy s4. I have three characteristic in my Custom Service. I made one of the characteristic's property as write-only and encrypted write. Then I changed it to non-encrypted write. The write operation didnt work for this characteristic anymore. I knew I have to restart Bluetooth adapter from settings and unpair the device but it doesn't work anymore at all. Then I changed the UUID of the characteristic. It discovers the characteristic with the old UUID. I dont get it. How can I remove all Bluetooth data related to one particular device from the Bluetooth adapter?
Edit: I doubled checked it with and iPhone device. iPhone discovers the characteristic with the new UUID while Android discovers it the old one.
Ok, After more research on settings (Samsung s4 Lollipop 5.01), I found out a way of clearing the Bluetooth cache: Settings -> More -> Application Manager -> All -> Bluetooth -> Clear Cache
If you want to do it programmatically follow this thread: How to programmatically force bluetooth low energy service discovery on Android without using cache