How do I format data to send data using udp

I am trying to recreate python code (see below) using Matlab to communicate using a udp-protocol from the Instrument Control Toolbox (with basically no python experience). However I can't seem to figure out the data formatting corresponding to the python formatting. So far I have come to

u = udp('127.0.0.1',25000); 
fopen(u) 
str = sprintf('%f',0,0,0,0,0,0);
fprintf(u,str)

How do I send the same as using my python-file, or am I doing this completely wrong? I appreciate any help in advance.

Python - code:

import socket, struct, time, math
from math import pi
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.sendto(struct.pack("dddddd",0,0,0,0,0,0), ("127.0.0.1", 25000))

Answer 1

[Nick]

Hi try this. This code will send the str that you define to a python client listening on that port when you run the code. The matlab code will only send 1x but the Python code will stay listening

Matlab code:

%String to send
str = 'hello world'

u = udp('localhost',50000);
fopen(u)

%Send string over udp
fwrite(u,str)
fclose(u)

Python code UDP client: import socket

IP = "localhost"
PORT = 50000

sock = socket.socket(socket.AF_INET,
                   socket.SOCK_DGRAM) # UDP PROTOCOL

sock.bind((IP, PORT))

while True:
  data, addr = sock.recvfrom(1024) # buffer = 1024 bytes
  print "received message:", data