code: def r12_serial_port(port):
      ''' Create a serial connect to the arm. '''
      return serial.Serial(port, baudrate=BAUD_RATE, parity=PARITY,
                           stopbits=STOP_BITS, bytesize=BYTE_SIZEf r12_serial_port(port):
      ''' Create a serial connect to the arm. '''
      return serial.Serial(port, baudrate=BAUD_RATE, parity=PARITY,
                           stopbits=STOP_BITS, bytesize=BYTE_SIZE)
docs: Create a serial connect to the arm.