class KITT:
    def __init__(self, port, baudrate=115200):
        self.serial = Serial(port, baudrate, rtscts=True)

    def send_command(self, command):
        self.serial.write(command.encode())

    def set_speed(self, speed):
        self.send_command(f'M{speed}\n')

    def set_angle(self, angle):
        self.send_command(f'D{angle}\n')

    def stop(self):
        self.set_speed(150)
        self.set_angle(150)

    def __del__(self):
        self.serial.close()