Sitografia:
https://it.wikipedia.org/wiki/Automa_a_stati_finiti
https://it.wikipedia.org/wiki/File:Mealy_machine_state_diagram.svg
https://it.wikiversity.org/wiki/Automa_a_stati_finiti#Descrizione_dell’automa
https://arduinoplusplus.wordpress.com/2019/07/06/finite-state-machine-programming-basics-part-1/
https://arduinoplusplus.wordpress.com/2019/07/19/finite-state-machine-programming-basics-part-2/
https://github.com/smarmengol/Modbus-Master-Slave-for-Arduino