add DoF add OSC input / output
* This code is based on examples and data from:
* - Sparkfun - https://github.com/sparkfun/ESP32_Thing
* - Arduino - https://www.arduino.cc/en/Reference/ArduinoBLE
* - Neil Kolban - https://github.com/nkolban/esp32-snippets/blob/master/Documentation/BLE%20C%2B%2B%20Guide.pdf
* - espressif - https://github.com/espressif/arduino-esp32
* - https://github.com/espressif/arduino-esp32/tree/master/libraries/BLE/src
* - https://github.com/espressif/arduino-esp32/blob/master/libraries/BLE/examples/BLE_client/BLE_client.ino
* - Blackmagic Design - https://www.blackmagicdesign.com/developer/product/camera, https://www.bhphotovideo.com/lit_files/452872.pdf
* - BMPCC_Remote_ESP32 - https://github.com/creacominc/BMPCC_Remote_Esp32
* - BlueMagic32 - https://github.com/schoolpost/BlueMagic32