Nada Ali

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5 years, 11 months ago.  This question has been closed. Reason: Off Topic

receiving strange Data from the server

Hi

I have STM32F429ZI Nucleo board. The board is a client and my PC is a server.

client program (STM32F429)

#include "mbed.h"
#include "EthernetInterface.h"


DigitalOut l1(LED1);
DigitalOut l2(LED2);
DigitalOut l3(LED3);
DigitalOut l4(LED4);
//uLCD_4DGL uLCD  (p9,p10,p8);      // serial tx, serial rx, reset pin;

const int ECHO_SERVER_PORT = 7;
const char* ECHO_SERVER_ADDRESS = "192.168.1.20";    // Adress from other Mbed
 
int main () 
{
    EthernetInterface eth;
    const char* ip = "192.168.1.22";     // MBED A = 1; MBED B = 2
    const char* mask = "255.255.255.0";
    const char* gateway = "192.168.1.1";
    eth.init(ip, mask, gateway);     //I'dont use DHCP bacuse i use two mbeds
    eth.connect();
   printf("Client IP Address is %s\n", eth.getIPAddress());
    
    // Connect to Server
    TCPSocketConnection socket;
    while (socket.connect(ECHO_SERVER_ADDRESS, ECHO_SERVER_PORT) > 0) 
    {
        printf("Unable to connect to (%s) \non port (%d)\n", ECHO_SERVER_ADDRESS, ECHO_SERVER_PORT);
        wait(1);
    }
    printf("Connected to Server at %s\n",ECHO_SERVER_ADDRESS);
    
    // Send message to server
    char hello[] = "Hello World";
    printf("Sending  message to Server : '%s' \n",hello);
    socket.send_all(hello, sizeof(hello) - 1);
    
    // Receive message from server
    char buf[256];
    int n = socket.receive(buf, 256);
    buf[n] = '\0';
    printf("Received message from server: '%s'\n", buf);
    
    // Clean up
    socket.close();
    eth.disconnect();
    
    while(true) {}
}

Server Program (PC)


import socket
import signal
import sys
 
 
def signal_handler(signal, frame):
    print 'You pressed Ctrl+C!'
    s.close()
    sys.exit(0)
 
signal.signal(signal.SIGINT, signal_handler)
 
print 'Server Running at ', socket.gethostbyname(socket.gethostname()) 
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('', 7))
s.listen(1)
 
while True:
    conn, addr = s.accept()
    print 'Connected by', addr
    while True:
        char data = conn.recv(256)
        if not data: break
        conn.sendall(data)
    conn.close()

The connection is established between the client and the server. The client is sending hello word but the server is showing strange output.

Could you please help me on the mentioned issue.

Thank you

Nada