WIZnet / Mbed 2 deprecated WizFi310_TCP_Echo_Server_Example

TCP Echo Server Example using WizFi310

Dependencies:   NetworkSocketAPI WizFi310Interface mbed

Prerequisite

This example shows that Wizwiki-W7500 and WizFi310 operates as a TCP server. When receiving data from a TCP client, it returns same data.

To implement this function, you need a Platform board and Wi-Fi board. Below are what we used.

  • WIZwiki-W7500 from WIZnet (Platform board)
  • WizFi310 from WIZnet (Wi-Fi board)

WIZwiki-W7500 Pin map

pin map

  • D0 is for RXD, D1 is for TXD
  • D6 is for CTS, D7 is for RTS
  • D9 is for RESET

WizFi310 Pin map

pin map

  • J1 is for RXD, J3 is for TXD
  • SW6-1 is connected to D6 for RTS, SW6-2 is connected to D7 for CTS
  • SW5-3 is connected to D9 for RESET

Software

Connect to Wi-Fi

wifi.connect(AP_SSID, AP_PASSWORD, AP_SECURITY);

Get information

const char *ip = wifi.get_ip_address();
const char *mac = wifi.get_mac_address();

Receive data and return to TCP client

while (true)
{
    int n = clt_sock.recv(buffer, sizeof(buffer));
    if( n < 0 )
    {
        clt_sock.close();
        srv.close();
    }
    if( n > 0 )
    {
        buffer[n] = '\0';
        printf("length : %d\r\n", n);
        clt_sock.send(buffer, n);
    }
}

Caution

TCP client and server should be in a same network.

main.cpp

Committer:
stkim92
Date:
2017-04-18
Revision:
1:5981ba4a8323
Parent:
0:50932ef4b276

File content as of revision 1:5981ba4a8323:

/* NetworkSocketAPI Example Program
 * Copyright (c) 2015 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#include "mbed.h"
#include "TCPSocket.h"
#include "mbed.h"
#include "WizFi310Interface.h"
#include "TCPSocket.h"
#include "TCPServer.h"

#define TARGET_NUCLEO_F411RE


#if defined(TARGET_NUCLEO_F411RE)
//Serial pc(USBTX, USBRX);
//WizFi310Internet wifi(PA_11, PA_12, D6, D7, D3, NC, 115200);
//WizFi310Interface wifi(D8, D2, D7, D6, D9, NC, 115200);
#endif

#if defined(TARGET_WIZwiki_W7500)
Serial pc(USBTX, USBRX);
WizFi310Interface wifi(D1, D0, D7, D6, D8, NC, 115200);
#endif

#define AP_SSID "wizms1"
#define AP_PASSWORD "maker0701"
#define AP_SECURITY NSAPI_SECURITY_WPA2

int main()
{
    pc.baud(115200);
    printf("WizFi310 NetworkSocketAPI TCP Server Example\r\n");
    
    wifi.connect(AP_SSID, AP_PASSWORD, AP_SECURITY);
    
    const char *ip = wifi.get_ip_address();
    const char *mac = wifi.get_mac_address();
    printf("IP address is: %s\r\n", ip ? ip : "No IP");
    printf("MAC address is: %s\r\n", mac ? mac : "No MAC");

    TCPServer srv;
    TCPSocket clt_sock;
    SocketAddress clt_addr;
    
    srv.open(&wifi);
    srv.set_blocking(true);
    srv.bind(80);
    srv.listen();
    srv.accept(&clt_sock);

    char buffer[512];

    while (true)
    {
        int n = clt_sock.recv(buffer, sizeof(buffer));
        if( n < 0 )
        {
            clt_sock.close();
            srv.close();
        }
        if( n > 0 )
        {
            buffer[n] = '\0';
            printf("length : %d\r\n", n);
            clt_sock.send(buffer, n);
        }
    }
}