main.cpp

00001 #include <stdio.h>
00002 #include <string.h>
00003 #include "mbed.h"
00004 #include "EthernetInterface.h"
00005 
00006 #define CITY        "Seoul"
00007 #define COUNTRY     "kr"
00008 #define API_KEY     "YOUR_API" //Fix This
00009 #define WEB_SERVER  "api.openweathermap.org"
00010 
00011 Serial pc(USBTX, USBRX);
00012 EthernetInterface eth;
00013 TCPSocketConnection sock;
00014 
00015 uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0xFF, 0xFF, 0xFF}; //Fix This
00016 
00017 // Function Prototypes
00018 void parsingGetData(void);
00019 void initEthernet(uint8_t* mac_addr);
00020 void requestHTTP(void);
00021 
00022 int main() 
00023 {
00024     pc.baud(115200);
00025     
00026     initEthernet(mac_addr);
00027     
00028     while(1)
00029     {
00030         requestHTTP();
00031         
00032         parsingGetData();
00033     
00034         sock.close();
00035         eth.disconnect();
00036         
00037         wait(60.0);
00038    };
00039 
00040 }
00041 
00042 /**
00043  * @brief   parsing Get Data from server
00044  * @detail  Function get data from server at once & parsing it for take needed data
00045  * @param   void
00046  * @return  void
00047  * @throws  return Occurs when the param value exceeds the specified range.
00048  */
00049 void parsingGetData(void)
00050 {
00051     char buffer[1024];
00052         
00053     /* get info */
00054     int ret;
00055     while (true) {
00056         ret = sock.receive_all(buffer, sizeof(buffer)-1);
00057         if (ret <= 0) break;
00058         buffer[ret] = '\0';
00059         pc.printf("Received %d chars from server: %s\n", ret, buffer);     
00060     }
00061     
00062     /* parsing weather, city, tempurature */
00063     char *weather;
00064     char *city;
00065     char *temp;
00066     uint8_t i;
00067     
00068     pc.printf("\r\n\r\n======== WeatherForecast ========\r\n");  
00069     weather = strstr(buffer, "main");
00070     pc.printf("\t State : ");
00071     for(i = 7; i < 20; i++)
00072     {
00073         if(*(weather+i) == '\"') break;
00074         pc.printf("%c", *(weather+i));
00075     }
00076             
00077     city = strstr(buffer, "name");
00078     pc.printf("\r\n\t City : ");
00079     for(i = 7; i < 20; i++)
00080     {
00081         if(*(city+i) == '\"') break;
00082         pc.printf("%c", *(city+i));
00083     }
00084         
00085     temp = strstr(buffer, "temp");
00086     pc.printf("\r\n\t temp(kelvin) : ");
00087     for(i = 6; i < 12; i++)
00088     {
00089         if((*(temp+i) == '\"')||(*(temp+i) == ',')) break;
00090         pc.printf("%c", *(temp+i));
00091     }
00092     pc.printf("\r\n\r\n");
00093 }
00094 
00095 /**
00096  * @brief   Request to server using HTTP.
00097  * @detail  Sends param values ​​to the server via HTTP.
00098  * @param   void
00099  * @return  void
00100  * @throws  
00101  */
00102 void requestHTTP(void)
00103 {
00104     char req_buf[256];
00105     
00106     /* TCP socket connect */   
00107     sock.connect(WEB_SERVER, 80);
00108     
00109     /* Request to WEB Server using HTTP */
00110     sprintf(req_buf,"GET /data/2.5/weather?q=%s,%s&appid=%s HTTP/1.1\nHost: %s\nConnection: close\n\n",
00111         CITY,COUNTRY, API_KEY, WEB_SERVER);
00112     sock.send_all(req_buf, strlen(req_buf));
00113 }
00114 
00115 /**
00116  * @brief   Initialize W5500 (Ethernet chip)
00117  * @detail  Function to initialize W5500 chip to use ethernet
00118  * @param   void
00119  * @return  void
00120  * @throws
00121  */
00122 void initEthernet(uint8_t* mac_addr) {
00123     int phy_link;
00124 
00125     eth.init(mac_addr); //Use DHCP
00126     
00127     eth.connect();
00128         
00129     /* phy link */
00130     do{
00131        phy_link = eth.ethernet_link();
00132        printf(".");
00133        wait(2);
00134     }while(!phy_link);
00135     printf("\r\n");
00136          
00137     printf("IP Address is %s\r\n", eth.getIPAddress());
00138 }