code for parsing xbee protocol in python with touch designer

parse_xbee.py

#
# dat - the DAT that received the data
# rowIndex - the row number the data was placed into
# message - an ascii representation of the data
#           Unprintable characters and unicode characters will
#           not be preserved. Use the 'bytes' parameter to get
#           the raw bytes that were sent.
# bytes - byte array of the data received

import binascii
incoming = []


def parse_packet(which_packet):
	adc_start = 11
	num_samples = which_packet[8]
	total = 0
	j = 0
	address = which_packet[5] + which_packet[4] * 256

	for i in range(0, num_samples):
		j = i + 2
		high_value = which_packet[j+adc_start]
		low_value = which_packet[(j + 1) + adc_start]
		print("high value ", high_value)
		print("low value ", low_value)
		this_sample = (high_value * 256) + low_value
		total = total + this_sample

	average = total / num_samples
	print("average", average)
	return average

def onReceive(dat, rowIndex, message, bytes):
	value = ord(bytes)
	if (value == 0x7E):
		if (len(incoming) == 22):
			parse_packet(incoming)
		incoming.clear()
	incoming.append(value)


	return