import serial
import time
from datetime import datetime

def send_serial_messages(port):
    try:
        # Serielle Verbindung öffnen
        ser = serial.Serial(
            port=port,
            baudrate=9600,  # Standard-Baudrate, anpassen falls nötig
            timeout=1
        )
        
        # Kurze Pause, um die Verbindung zu stabilisieren
        time.sleep(2)
        
        print(f"Connected to {port}. Sending time and 'Hallo' every 2 seconds...")
        
        while True:
            # Aktuelle Zeit holen
            current_time = datetime.now().strftime("%H:%M:%S")
            
            # Zeit und "Hallo" als Nachricht zusammenstellen
            message = f"{current_time} Hallo\n"
            
            # Nachricht senden
            ser.write(message.encode('utf-8'))
            print(f"Sent: {message.strip()}")
            
            # 2 Sekunden warten
            time.sleep(2)
            
    except serial.SerialException as e:
        print(f"Error: Could not open port {port}: {e}")
    except KeyboardInterrupt:
        print("\nStopped by user.")
        ser.close()
        print("Serial connection closed.")
    except Exception as e:
        print(f"An error occurred: {e}")
        if 'ser' in locals():
            ser.close()

if __name__ == "__main__":
    # Port definieren
    port = "COM16"
    
    # Funktion aufrufen
    send_serial_messages(port)