Solution for EMONCMS

EmonCMS.ino

#include <SPI.h>
#include <Ethernet.h>

byte mac[] = { 0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02 };
IPAddress ip(192,168,0, 13);

EthernetClient client;

unsigned long lastConnectionTime = 0;         
const unsigned long postingInterval = 60000;                                                

const String APIKEY="db2eb7befe02a72d49dffc1cc4365fdc";          
const char server[] ="www.emoncms.org";
const int PORT=80;

int photoSensorPin = 1;
volatile int photoSensorValue = 0;

void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  // start the Ethernet connection:
  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    // try to congifure using IP address instead of DHCP:
    Ethernet.begin(mac, ip);
  }
  // give the Ethernet shield a second to initialize:
  delay(1000);
  Serial.println("connecting...");

  // if you get a connection, report back via serial:
  if (client.connect(server, 80)) {
    Serial.println("connected");
    // Make a HTTP request:
    String str = "GET /input/post?node=emontx&fulljson=";
    str += "{\"lum\":";
    photoSensorValue = analogRead(photoSensorPin);
    str += String(photoSensorValue);
    str += "}&apikey=";
    str += APIKEY;
    str+= " HTTP/1.1";
    Serial.println(str);
    client.println(str);
    client.println("Host: www.emoncms.org");
    client.println("Connection: close");
    client.println();
  } else {
    // if you didn't get a connection to the server:
    Serial.println("connection failed");
  }
}

void loop() {
    readData();
    //setup();
}
void readData() {
  // if there are incoming bytes available
  // from the server, read them and print them:
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }

  // if the server's disconnected, stop the client:
  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();
    delay(1000);
    setup();
  }
}