[ToneAC](https://bitbucket.org/teckel12/arduino-toneac/) does not work on ESP32. Someone should make port. This is merge of RoboticsBrno/ArduinoLearningKitStarter#27
ToneAC does not work on ESP32. Someone should make port.
This is merge of RoboticsBrno/ArduinoLearningKitStarter#27