ArduinoScetch

/*
Project for contol staff of firm, his time arrival on workplase.
In project using Arduino UNO, Ethernet shield,MFRC 522 with magnetic card and work with MySQL.
*/


#include <MFRC522.h>
#include <SPI.h>
#include <string.h>
#include <Ethernet.h>

#define SS_PIN 6
#define RST_PIN 7

MFRC522 mfrc522(SS_PIN, RST_PIN); //об'єкт MFRC522
MFRC522::MIFARE_Key key;

byte code[4];
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1,120);   

int relay = 5;

boolean incoming = 0;

EthernetServer server(80);
//Setting Serial connection , relay port, rfid initialization, Starting the server
void setup(){
        Serial.begin(9600);
        SPI.begin(); //initialization SPI
        mfrc522.PCD_Init(); //initialization rfid
        for (byte i = 0; i < 6; i++) {
          key.keyByte[i] = 0xFF;
        }
        
        Ethernet.begin(mac,ip);
        server.begin();
        
        pinMode(relay,OUTPUT);
        digitalWrite(relay,HIGH);
}

void loop(){

//Waiting and reading rfid card

  if ( ! mfrc522.PICC_IsNewCardPresent()) {
		return;
	}

	
  if ( ! mfrc522.PICC_ReadCardSerial()) {
		return;
	}
  
  
//Waiting for client connection and reading bytes from client

  EthernetClient client = server.available();
  if (client) {
     boolean currentLineIsBlank = true;
     while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        
        
//Enabling relay upon receipt of the client '/ $ 1' to the url tape

        if(incoming && c == ' '){
          incoming = 0;
        }
        if(c == '$'){
          incoming = 1;
        }
        
        if(incoming == 1){
         if(c != '$'){
          if(c == '1'){
            digitalWrite(relay,LOW);
            delay(1000);
            digitalWrite(relay,HIGH);
           
          }
         }
        }
        
        
//Issuance user id (UID) to page
     if (c == '\n' && currentLineIsBlank) { 
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("Connection: close");  
	  client.println("Refresh: 0.5");  
          client.println();
          client.println("<!DOCTYPE HTML>");
          client.println("<html>");  
          
          for (byte i = 0; i < mfrc522.uid.size; i++){
             client.print(mfrc522.uid.uidByte[i]< 0x10 ? "0" : "");
             client.print(mfrc522.uid.uidByte[i], HEX);
          } 
          client.println("</html>");
          break;
        }
        if (c == '\n') {
          currentLineIsBlank = true;
        } 
        else if (c != '\r') {
          currentLineIsBlank = false;
        }
      }
     }
    delay(1);
    client.stop();
  }
}   