RFID-ESP8266-SVR.ino

#include <SPI.h>
#include <MFRC522.h>
#include <ESP8266WiFi.h>
#include <string.h>

#define RST_PIN         15           // Configurable, see typical pin layout above
#define SS_PIN          2          // Configurable, see typical pin layout above

const char* ssid = "Hanam_Public";
const char* password = "";
const char* host="14.63.170.238";

MFRC522 mfrc522(SS_PIN, RST_PIN);   // Create MFRC522 instance.
/*
 * Initialize.
 */
 byte* data;
String a;
String b;
String c;
String d;

 WiFiClient client;
void setup() {
    Serial.begin(115200);         // Initialize serial communications with the PC
    while (!Serial);            // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
    SPI.begin();                // Init SPI bus
    mfrc522.PCD_Init();         // Init MFRC522 card
    //for wifi
    Serial.print("Connecting to ");
    Serial.println(ssid);
  
    WiFi.begin(ssid, password);
    while(WiFi.status() !=WL_CONNECTED)
    {
      delay(500);
      Serial.print(".");
    }
    Serial.println();
    Serial.println("Wifi connected");
    Serial.println("IP adress: ");
    Serial.println(WiFi.localIP());
    Serial.println("NesMask: ");
    Serial.println(WiFi.subnetMask());
    Serial.println("Getway: ");
    Serial.println(WiFi.gatewayIP());
    //End
    
    Serial.println(F("RFID Read: "));
}

void loop() { 
//Connection to server
  Serial.print("Connecting to: ");
  Serial.println(host);

  
 const int httpPort= 80;
 if(!client.connect(host,httpPort))
 {
  Serial.println("Connection failed");
  return;
 }
 
  
  // Look for new cards
  if ( ! mfrc522.PICC_IsNewCardPresent()) {
    delay(50);
    return;
  }
  // Select one of the cards
  if ( ! mfrc522.PICC_ReadCardSerial()) {
    delay(50);
    return;
  }
  // Show some details of the PICC (that is: the tag/card)
  Serial.print(F("Card UID:"));
  dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);
  Serial.println();

  data = mfrc522.uid.uidByte, mfrc522.uid.size;
  for(int i=0; i<4; i++)
  {
    Serial.print(data[i],HEX);
  }
  a=String(data[0],HEX);
b=String(data[1],HEX);
c=String(data[2],HEX);
d=String(data[3],HEX);
a.toUpperCase();
b.toUpperCase();
c.toUpperCase();
d.toUpperCase();
  
  //Data sending 
 String url ="/index.php?rfid="+ String(a)+String(b)+String(c)+String(d);
 Serial.println("Requesting URL  ");
 //Serial.println(url);

 client.print(String("GET ") + url + " HTTP/1.0\r\n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");

 delay(5000);
 while(client.available())
 {
  String line = client.readStringUntil('\r');
  Serial.print(line);
 }
 Serial.println();
 Serial.println("Closing connection");
 delay(5000);
}

// Helper routine to dump a byte array as hex values to Serial
void dump_byte_array(byte *buffer, byte bufferSize) {
  for (byte i = 0; i < bufferSize; i++) {
    Serial.print(buffer[i] < 0x10 ? " 0" : " ");
    Serial.print(buffer[i], HEX);
  }
}