File content as of revision 0:9d11a3afff01:

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

float lux(void)
{
AnalogIn ain(p15);

float vr=0,lr=0;
   
float vol[12]={0.36,0.61,0.8,0.9,1.23,1.45,1.81,2.06,2.62,2.81,3.02,3.25};
float lux[12]={27000,20000,16000,11000,4000,1500,833,578,201,104,40,23};

int i;
float m=0;

vr=ain*3.3;
for(i=0; vr> vol[i];i++);
m = ((lux[i]-lux[i+1])/(vol[i]-vol[i+1]));
lr=lux[i+1]+(m*(vr-(vol[i+1])));

return vr;
}


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

int main() {
    float l=0;
    EthernetInterface eth;
    eth.init(); //Use DHCP
    eth.connect();
    printf("IP Address is %s\n", eth.getIPAddress());
    char* public_key = "wpv0ajajxXsllRZOlbn0" ;
    char* private_key = "wzep7E7EPDCRR0b5Rdga" ;
    char http_cmd[256];
    for(int i=0 ; i<5 ;i++)
    {
        //char c=i;
        TCPSocketConnection sock;
        sock.connect("data.sparkfun.com", 80);
    l=lux();
    printf("volt = %.2f",l);
       sprintf(http_cmd,"GET /input/%s?private_key=%s&var1=%.2f HTTP/1.0\n\n", public_key, private_key, l);
    //char http_cmd[] = "GET /input/wpv0ajajxXsllRZOlbn0?private_key=wzep7E7EPDCRR0b5Rdga&var1=%c HTTP/1.0\n\n",i;
        sock.send_all(http_cmd, sizeof(http_cmd)-1);
    
    char buffer[300];
    int ret;
    while (true) {
        ret = sock.receive(buffer, sizeof(buffer)-1);
        if (ret <= 0)
            break;
        buffer[ret] = '\0';
        printf("Received %d chars from server:\n%s\n", ret, buffer);
    }
    sock.close();
     
    
    }
    eth.disconnect();
    
    while(1) {}
}