This method will call the Tone library for the selected pin.
        It requires FirmataPlus to be loaded onto the arduino

        If the tone command is set to TONE_TONE, then the specified
        tone will be played.

        Else, if the tone command is TONE_NO_TONE, then any currently
        playing tone will be disabled.

        :param pin: Pin number

        :param tone_command: Either TONE_TONE, or TONE_NO_TONE

        :param frequency: Frequency of tone

        :param duration: Duration of tone in milliseconds

        :returns: No return value

async def play_tone(self, pin, tone_command, frequency, duration):
        """
        This method will call the Tone library for the selected pin.
        It requires FirmataPlus to be loaded onto the arduino

        If the tone command is set to TONE_TONE, then the specified
        tone will be played.

        Else, if the tone command is TONE_NO_TONE, then any currently
        playing tone will be disabled.

        :param pin: Pin number

        :param tone_command: Either TONE_TONE, or TONE_NO_TONE

        :param frequency: Frequency of tone

        :param duration: Duration of tone in milliseconds

        :returns: No return value
        """
        # convert the integer values to bytes
        if tone_command == Constants.TONE_TONE:
            # duration is specified
            if duration:
                data = [tone_command, pin, frequency & 0x7f, (frequency >> 7) & 0x7f,
                        duration & 0x7f, (duration >> 7) & 0x7f]

            else:
                data = [tone_command, pin,
                        frequency & 0x7f, (frequency >> 7) & 0x7f, 0, 0]
        # turn off tone
        else:
            data = [tone_command, pin]
        await self._send_sysex(PrivateConstants.TONE_DATA, data)