This allow to catch the events when connected /disconnected,, etc...
This also allow to get parameters of events like the remote address of connected devices, etc...
Small change but lot of flexibility
* Update BLE lib
* Update IDF to f586f5e
* Restructure Bluetooth Serial includes
* Update esptool and gen_esp32part
* Add partition scheme selection for menuconfig
* Add partition scheme selection for Arduino IDE
* Fix BLE example
* Second attempt BLE fix
* Add exceptions to PIO
* Add BluetoothSerial library
A simple UART to Classical Bluetooth bridge for ESP32
* Create README.md
* Fix typos
* Replace deprecated header and small fixes
* Add coexistence with BLE
* Add missing semicolon