WIZnet / My_Weatherforecast_WIZwiki-W7500

Using TCP Client on WIZwiki-W7500, display weather conditions on led and temperature with servo-motor

Dependencies:   WIZnetInterface mbed-src

Prerequisite

This example is for PIR test using digital I/O.

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

  • WIZwiki-W7500 from WIZnet (Platform board and Ethernet I/F board)

Hardware Configuration

WIZwiki-W7500 Pin map

pin map

Just connect Ethernet Cable & USB Cable

Software

Init Ethernet

void initEthernet(uint8_t* mac_addr) {
    int phy_link;

    eth.init(mac_addr); //Use DHCP
    
    eth.connect();
        
    /* phy link */
    do{
       phy_link = eth.ethernet_link();
       printf(".");
       wait(2);
    }while(!phy_link);
    printf("\r\n");
         
    printf("IP Address is %s\r\n", eth.getIPAddress());
}

Request to server using HTTP

void requestHTTP(void)
{
    char req_buf[256];
    
    /* TCP socket connect */   
    sock.connect(WEB_SERVER, 80);
    
    /* Request to WEB Server using HTTP */
    sprintf(req_buf,"GET /data/2.5/weather?q=%s,%s&appid=%s HTTP/1.1\nHost: %s\nConnection: close\n\n",
        CITY,COUNTRY, API_KEY, WEB_SERVER);
    sock.send_all(req_buf, strlen(req_buf));
}

Get data from server & Parsing it

void parsingGetData(void)
{
    char buffer[1024];
        
    /* get info */
    int ret;
    while (true) {
        ret = sock.receive_all(buffer, sizeof(buffer)-1);
        if (ret <= 0) break;
        buffer[ret] = '\0';
        pc.printf("Received %d chars from server: %s\n", ret, buffer);     
    }
    
    /* parsing weather, city, tempurature */
    char *weather;
    char *city;
    char *temp;
    uint8_t i;
    
    pc.printf("\r\n\r\n======== WeatherForecast ========\r\n");  
    weather = strstr(buffer, "main");
    pc.printf("\t State : ");
    for(i = 7; i < 20; i++)
    {
        if(*(weather+i) == '\"') break;
        pc.printf("%c", *(weather+i));
    }
            
    city = strstr(buffer, "name");
    pc.printf("\r\n\t City : ");
    for(i = 7; i < 20; i++)
    {
        if(*(city+i) == '\"') break;
        pc.printf("%c", *(city+i));
    }
        
    temp = strstr(buffer, "temp");
    pc.printf("\r\n\t temp(kelvin) : ");
    for(i = 6; i < 12; i++)
    {
        if((*(temp+i) == '\"')||(*(temp+i) == ',')) break;
        pc.printf("%c", *(temp+i));
    }
    pc.printf("\r\n\r\n");
}

Caution

Must fix API_KEY & MAC Address

Files at this revision

API Documentation at this revision

Revision 1:e2652bd064c6, committed 2012-06-26

Comitter:
donatien
Date:
Tue Jun 26 15:34:26 2012 +0000
Parent:
0:bb128f0e952f
Child:
2:e087e9b789e9
Commit message:
Switched from uint8_t* to char* for data type

Changed in this revision

EthernetInterface.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/EthernetInterface.lib	Tue Jun 26 14:39:21 2012 +0000
+++ b/EthernetInterface.lib	Tue Jun 26 15:34:26 2012 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/EthernetInterface/#f5776537f27f
+http://mbed.org/users/mbed_official/code/EthernetInterface/#c50597f8d7a2

--- a/main.cpp	Tue Jun 26 14:39:21 2012 +0000
+++ b/main.cpp	Tue Jun 26 15:34:26 2012 +0000
@@ -11,15 +11,15 @@
     TCPSocket sock;
     sock.connect("mbed.org", 80);
     
-    const char http_cmd[] = "GET /media/uploads/donatien/hello.txt HTTP/1.1\r\nHost: %s\r\n\r\n";
-    sock.send((std::uint8_t*)http_cmd, sizeof(http_cmd) - 1, 3000);
+    char http_cmd[] = "GET /media/uploads/donatien/hello.txt HTTP/1.1\r\nHost: %s\r\n\r\n";
+    sock.send(http_cmd, sizeof(http_cmd) - 1, 3000);
 
     char in_buf[256];      
     bool firstIteration = true;
     int ret;
     do
     {
-        ret = sock.receive((std::uint8_t*)in_buf, 255, firstIteration?3000:0);
+        ret = sock.receive(in_buf, 255, firstIteration?3000:0);
         in_buf[ret] = '\0';
         
         printf("Received %d chars from server: %s\n", ret, in_buf);