import platform

import serial
import time

def invia_e_leggi_frase(porta_seriale):
    try:
        porta_seriale.write(b'Connection OK')
        time.sleep(1)
        received_data = porta_seriale.read(15)
        if not received_data:
            print("Nessun dato ricevuto")
        else:
            print(f'Frase ricevuta: {received_data.decode("utf-8")}')

    except Exception as e:
        print(f"Errore: {e}")


is_win = platform.system().lower() == "windows"

if is_win:
    dev="COM5"
else:
    dev = '/dev/ttyUSB0'

try:
    ser = serial.Serial(dev, 9600, timeout=1, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS)
    if ser.is_open:
        print(f'Connesso alla porta COM5')

        try:
            while True:
                invia_e_leggi_frase(ser)
                time.sleep(1)

        except KeyboardInterrupt:
            pass

        finally:
            ser.close()

    else:
        print(f'Impossibile aprire la porta COM5')

except OSError as e:
    print(f"Errore nell'apertura della porta COM5: {e}")
except Exception as e:
    print(f"Errore generico: {e}")