void XBee::send(XBeeRequest &request, bool escape) {
	// the new new deal

	sendByte(START_BYTE, false);

	// send length
	uint8_t msbLen = ((request.getFrameDataLength() + 2) >> 8) & 0xff;
	uint8_t lsbLen = (request.getFrameDataLength() + 2) & 0xff;

	sendByte(msbLen, escape);
	sendByte(lsbLen, escape);

	// api id
	sendByte(request.getApiId(), escape);
	sendByte(request.getFrameId(), escape);

	uint8_t checksum = 0;

	// compute checksum, start at api id
	checksum+= request.getApiId();
	checksum+= request.getFrameId();

	//std::cout << "frame length is " << static_cast<unsigned int>(request.getFrameDataLength()) << std::endl;

	for (int i = 0; i < request.getFrameDataLength(); i++) {
//		std::cout << "sending byte [" << static_cast<unsigned int>(i) << "] " << std::endl;
		sendByte(request.getFrameData(i), escape);
		checksum+= request.getFrameData(i);
	}

	// perform 2s complement
	checksum = 0xff - checksum;

//	std::cout << "checksum is " << static_cast<unsigned int>(checksum) << std::endl;

	// send checksum
	sendByte(checksum, escape);

	// send packet (Note: prior to Arduino 1.0 this flushed the incoming buffer, which of course was not so great)
	flush();
}

	/**
	 * Sends a XBeeRequest (TX packet) out the serial port
	 */
	void send(XBeeRequest &request, bool escape=false);

payload=b'H\x11\x00H\x13\x00H}\x00H~\x00' 12 <class 'bytes'>
unsigned short data=17 index=3 --> 0x11
unsigned short data=19 index=6 --> 0x13
unsigned short data=125 index=9 --> 0x7D
unsigned short data=126 index=12 --> 0x7E