Galileo_full_communication.txt

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

// include <Process.h>

// the media access control (ethernet hardware) address for the shield:
byte mac[] = { 0x98, 0x4F, 0xEE, 0x01, 0xDE, 0xFD };  

//the IP address for the shield:
byte ip[] = { 169, 254, 26, 102 };    

byte dns[] = { 8, 8, 8, 8 };
byte gateway[] = { 169, 254, 26, 1 };    
byte subnet[] = { 255, 255, 255, 0 };    

int red_led = 12;
int green_led = 13;


int sensorPin = A5;
double alpha = 0.75;
int period = 100;
double change = 0.0;
double minval = 0.0;

  int counter = 0;
  static const int max_counter = 1;
  char buf[1000];

  double lastRead = 0.0;
  
  unsigned long initialTime;
  unsigned long endTime; 
  
  unsigned long readLatency = 10;
  
  boolean debug = true;
  

void setup()
{

  Ethernet.begin(mac, ip, dns, gateway, subnet);
  //Ethernet.begin(mac, ip);
  Serial.begin(9600);      // open the serial port at 9600 bps:
  pinMode(red_led, OUTPUT);
  pinMode(green_led, OUTPUT);  
  
  
  
}

void loop () {
  
  
    initialTime = millis();
//     EthernetClient client;
     lastRead = readAndSendHeart();
     
     digitalWrite(red_led, LOW);    // turn the LED off by making the voltage LOW
     digitalWrite(green_led, LOW);    // turn the LED off by making the voltage LOW

    /* if ( lastRead > 988.0 && lastRead < 991.9 ) {

       sprintf(buf,"%s&value%d=%2.6f",buf, counter, lastRead );
     

     } 
     if (max_counter == counter ) {
       sprintf(buf,"%s\n",buf);
       counter =0;
       int errorCode = system(buf);
  // int errorCode = 0;

if ( debug ) {
       Serial.print("Sending To Server ");
       Serial.print(buf);
       Serial.print("   code:");
       Serial.print(errorCode);
       Serial.println("");
}
*/

       sprintf(buf,"curl http://169.254.26.128:3000/ecgs/2/new_ecgs?value=%2.6f",lastRead);
       
         int errorCode = system(buf);
         if (errorCode == 0)
         {
           digitalWrite(green_led, HIGH);   // turn the LED on (HIGH is the voltage level)
         } else {
             digitalWrite(red_led, HIGH);   // turn the LED on (HIGH is the voltage level)
         }       

      // sprintf(buf,"curl http://169.254.26.128:3000/ecgs/2/new_ecgs?value=%2.6f",lastRead);

   //  }
     
     endTime = millis();

if ( debug ) {

    Serial.print("Galileo IP: ");
    Serial.println(Ethernet.localIP());
    Serial.print("Initial time: ");
    Serial.println(initialTime);
    Serial.print("End time: ");
    Serial.println(endTime);
    Serial.print("difference ");    
    endTime = endTime - initialTime;
    Serial.println(endTime); 

    Serial.print("Delay: ");    
    Serial.println(endTime > readLatency ? 0 : readLatency - endTime);
    
}

     endTime = endTime - initialTime;

     
     delay( endTime > readLatency ? 0 : readLatency - endTime );
    
     //delay( 100);

 }


//int webUnixTime (EthernetClient &client)
int readAndSendHeart ()
{


 // Serial.println(Ethernet.localIP());
 // Serial.println("Trying to connect to the server \n");
 
 
    static double oldValue = 0;
    static double oldChange = 0;
 
    int rawValue = analogRead (sensorPin);
    double value = alpha * oldValue + (1 - alpha) * rawValue;
 
 if ( debug ) {
 
    Serial.print (rawValue);
    Serial.print (",");
    Serial.println (value);

//value = 232.12;

 }

    oldValue = value;
 



     
 return   (value -970)*6;

}