How can I send data from Matlab UDP client to a python server on to different PCs?

I'm trying to send data from one PC running a Matlab udp client to another PC(running ubuntu) which has a python udp server. But nothing happens. I've tried disabling the firewall and looking through the forums but havent found a solution yet. Hope someone can asisst me with this issue. Its a crucial part of my capstone project. Thanks in advance!

This is the code for the Matlab udp client:

ipA = '155.69.124.203', portA = 5005; % PC running Matlab
ipB = '10.27.109.80', portB = 5006; % PC running python server

udpA = udp(ipB,portB,'LocalPort',portA);

fopen(udpA);

tstart = datevec(now);
while etime(datevec(now),tstart)<30
    
    fprintf(udpA, 'Great')
    
    pause(3)
end

fclose(udpA);
clear ipb portB ipA portA udpA

This is the code for the python server:

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import socket

# Create a UDP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

# Bind the socket to the port
server_address = ('localhost', 5006)
print('starting up on {} port {}'.format(*server_address))
sock.bind(server_address)

while True:
    print('\nwaiting to receive message')
    data, address = sock.recvfrom(4096)

    print('received {} bytes from {}'.format(
        len(data), address))
    print(data)

[Andrew Janke]

What udp() function are you calling there? As far as I'm aware, Matlab does not ship with a udp() function.

[Sean de Wolski]

udp is in the instrument control toolbox

[Izzat Adnan]

Its my mistake. I put the wrong ip adress of the server PC. Its working now. Thanks.

[Alvaro Torrejón Padilla]

Hi Izzat,

I want to connect matlab with python, sending data via ip network. I have my python script which acts as a server using socket. I'm trying to use your code so i can use my matlab script as a client and send string data to python. But nothing works.

PYTHON SERVER SCRIPT

# Echo server program

import socket

import threading

HEADER= 64

PORT = 5050

SERVER = socket.gethostbyname(socket.gethostname())

print(SERVER)

ADDR = (SERVER,PORT)

FORMAT ='utf-8'

DISCONNECT_MESSAGE="!DISCONNECT"

server=socket.socket(socket.AF_INET,socket.SOCK_STREAM)

server.bind(ADDR)

def handle_client (conn, addr):

print(f"[NEW CONNECTION] {addr} connected.")

connected =True

while connected:

msg_length= conn.recv(HEADER).decode(FORMAT)

if msg_length:

msg_length = int(msg_length)

msg = conn.recv(msg_length).decode(FORMAT)

if msg == DISCONNECT_MESSAGE:

connected=False

print(f"[{addr}] {msg}")

conn.close()

def start():

server.listen()

print(f"[LISTENING] Server is listenning on {SERVER}")

while True:

addr, conn = server.accept()

thread= threading.Thread(target=handle_client,args=(conn,addr))

thread.start()

print(f"[ACTIVE CONNECTIONS] {threading.activeCount() -1}")

print("[STARTING] server is starting...")

start()

MATLAB CLIENT SCRIPT

ipA = 'IP MATLAB CLIENT', portA = 5051; % PC running Matlab

ipB = 'IP PYTHON SERVER', portB = 5050; % PC running python server

udpA = udp(ipB,portB,'LocalPort',portA);

fopen(udpA);

tstart = datevec(now);

while etime(datevec(now),tstart)<30

fprintf(udpA, 'Great')

pause(3)

end

fclose(udpA);

clear ipb portB ipA portA udpA

%%%%

I would be very grateful if you could help me with that.