WIZnet / Mbed 2 deprecated TCPClient_HelloWorld

TCP Client, WIZwiki-W7500ECO. It will get weather of South Korea from openweathermap.org

Dependencies:   WIZnetInterface mbed

Fork of TCPClient_HelloWorld by jehoon song

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Table of Contents

  1. Prerequisite
  2. Hardware Configuration
  3. Software
  4. Images

Prerequisite

This example is for obtainning and printting data from server(OpenWeatherMap). WIZwiki-W7500ECO is TCP client mode.

To implement this function, you need a Platform board, network Interface board.

  • WIZwiki-W7500ECO from WIZnet (Platform board and Ethernet I/F board)

Hardware Configuration

WIZwiki-W7500ECO Pin map

http://wizwiki.net/wiki/lib/exe/fetch.php?media=products:wizwiki-w7500eco:wizwiki-w7500eco_detailpinout.png

Software

Select the city

main.cpp

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

int main() {
   
    int phy_link;
    printf("Wait a second...\r\n");
    uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0x01, 0x02, 0x03};
    
    EthernetInterface eth;
    eth.init(mac_addr); //Use DHCP
    eth.connect();
    
     do{
     phy_link = eth.ethernet_link();
     printf("...");
     wait(2);
     }while(!phy_link);
     printf("\r\n");
     
    printf("IP Address is %s\r\n", eth.getIPAddress());
    
    TCPSocketConnection sock;
    sock.connect("api.openweathermap.org", 80);
    

    char http_cmd[] = "GET /data/2.5/weather?q=Seoul,kr HTTP/1.0\n\n";
    sock.send_all(http_cmd, sizeof(http_cmd)-1);

    char buffer[400];
    int ret;
    while (true) {
        ret = sock.receive(buffer, sizeof(buffer)-1);
        if (ret <= 0) break;
        buffer[ret] = '\0';
        printf("Received %d chars from server: %s\n", ret, buffer);     
    }

    sock.close();
    
    eth.disconnect();

}

Images

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