def read_serial():
    while True:
        data = ser.readline()
        #print(data)
        print(len(data))

        if len(data) == 14:
            header = struct.unpack_from('c', data, 0)
            elevator = struct.unpack_from('f', data, 1)
            elevator = round(elevator[0], 3)
            aileron = struct.unpack_from('f', data, 5)
            aileron = round(aileron[0], 3)
            rudder = struct.unpack_from('f', data, 9)
            rudder = round(rudder[0], 3)
            #print(header)
            print(elevator, aileron, rudder)