arduino_websocket.cpp

#include "Arduino.h"

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

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; /* Edit here */
IPAddress ip(192,168,0, 1); /* Edit here */

/* socket.io server */
char SERVER[] = "192.168.0.10"; /* Edit here */
int PORT = 3013;
WebSocketClient client;


/**
 *
 *
 */
int connectSrv(char host[],int& port) {

  if(client.connect(host, "/socket.io/1/websocket/", port)){
    client.setDataArrivedDelegate(dataArrived);
    delay(1000);
    Serial.print("Debug: Connected");
    return true;
  } 
  else { 
    return false;
  }

}

/**
 * Initialize the Ethernet server library
 * with the IP address and port you want to use 
 */
void setup() {

  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);

  Serial.print("Debug: Setup");
  delay(1000);

  int rc = connectSrv(SERVER, PORT);



}

void dataArrived(WebSocketClient client, String data) {
  Serial.println("Data Arrived: "+data);
}

float aval2lx(int aval) {
  float voltage = ((long)aval * 5000) / 1024;
  float microamp = (voltage * 1000) / 1000;
  return (microamp / (290 / 100));

}

/*
 * main loop
 */
void loop() {
  int rc = false;
  if (!client.connected()) {
    client.disconnect();
    while(!rc) {
      rc = connectSrv(SERVER, PORT);
      if (!rc) delay(1000);
    }
  }

  client.monitor();

  int sensorReading = analogRead(0);

  /* calculator for lux */
  float lx = aval2lx(sensorReading);


  /* send a message */
  String message = "{";
  message += "\"CDS_A0\":";
  message += (int)lx;
  message += "}";

  client.send(message);
  delay(1000);
}