SocketServer-Matlab.py

#####################################################################
# Aldo Vargas
# 
#
# Purpose:
#	Matlab sends n signals via UDP to the Raspberry pie... 
#	RPI receives the data, unpacks it and prints it.
#	- This is just for testing the best methodology between Matlab-rpi
#	This methos uses sockets
#
########################################################################


import SocketServer
import struct
import time

#Raspberry pie IP address
#UDP_IP = "172.30.144.154"
#Mac IP address
UDP_IP = "130.209.27.59"
#UDP_IP = "localhost"
UDP_PORT = 51001


class MyUDPHandler(SocketServer.BaseRequestHandler):
	"""
	This class works similar to the TCP handler class, except that
	self.request consists of a pair of data and client socket, and since
	there is no connection the client address must be given explicitly
	when sending data back via sendto().
	"""

	def handle(self):
		udp_mess=""
		mess=""
		numOfValues=0
		timestamp = time.time()
		data = self.request[0].strip()
		socket = self.request[1]
		try:
			numOfValues = len(data) / 8
			mess=struct.unpack('>' + 'd' * numOfValues, data)
			for x in range(0, numOfValues):
				udp_mess = udp_mess+" "+str(mess[x])
			diff = time.time() - timestamp
			print str(diff)+udp_mess
			udp_mess=""
		except:
			pass


if __name__ == "__main__":
	server = SocketServer.UDPServer((UDP_IP, UDP_PORT), MyUDPHandler)
	#st = datetime.datetime.fromtimestamp(time.time()).strftime('%Y_%m_%d+%H-%M-%S')+".csv"
	#file = open("data/"+st, "w")
	print "System ready on "+str(UDP_IP)
	server.serve_forever()