import serial
from datetime import datetime

PORT = "COM3"        # oppure "/dev/ttyUSB0"
BAUDRATE = 115200
LOG_FILE = "serial_log.txt"

ser = serial.Serial(PORT, BAUDRATE, timeout=1)

print("In ascolto sulla seriale... Ctrl+C per uscire")

with open(LOG_FILE, "a", encoding="utf-8") as f:
    try:
        while True:
            line = ser.readline().decode(errors="ignore").strip()
            if line:
                timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f")[:-3]
                out = f"[{timestamp}] {line}"
                print(out)
                f.write(out + "\n")
                f.flush()
    except KeyboardInterrupt:
        print("\nChiusura...")
    finally:
        ser.close()