import serial
import time
import sys

def main():
    port = "/dev/cu.usbmodem411CF91D65091"
    print(f"Connecting to {port} at 115200...")
    try:
        ser = serial.Serial(port, 115200, timeout=1.0)
    except Exception as e:
        print(f"Error opening serial port: {e}")
        return

    print("Reading serial output for 3 seconds...")
    start_time = time.time()
    try:
        while time.time() - start_time < 3.0:
            if ser.in_waiting > 0:
                data = ser.read(ser.in_waiting)
                sys.stdout.write(data.decode("utf-8", "ignore"))
                sys.stdout.flush()
            time.sleep(0.1)
    except KeyboardInterrupt:
        pass
    finally:
        ser.close()
        print("\nSerial connection closed.")

if __name__ == "__main__":
    main()