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Author: isameersah

01_Test_RFID-RC522_Serial.ino

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+// This code only takes the UID in string form.
+// If you want to see more detailed information about an RFID card or keychain, please run the program code "DumpInfo".
+// The "DumpInfo" program code is located at :
+// Library folder "MFRC522" -> "examples" folder -> "DumpInfo" folder -> DumpInfo.ino
+// or
+// From Arduino IDE : File -> Examples -> MFRC522 -> DumpInfo
+// or
+// From Arduino IDE : File -> Examples -> INCOMPATIBLE-> MFRC522 -> DumpInfo
+
+//----------------------------------------Including the libraries.
+#include <SPI.h>
+#include <MFRC522.h>
+//----------------------------------------
+
+// Defines SS/SDA PIN and Reset PIN for RFID-RC522.
+#define SS_PIN  5  
+#define RST_PIN 4
+
+// Variable to read data from RFID-RC522.
+int readsuccess;
+char str[32] = "";
+String UID_Result = "";
+
+// Create MFRC522 object as "mfrc522" and set SS/SDA PIN and Reset PIN.
+MFRC522 mfrc522(SS_PIN, RST_PIN);
+
+//________________________________________________________________________________getUID()
+// Subroutine to obtain UID/ID when RFID card or RFID keychain is tapped to RFID-RC522 module.
+int getUID() {  
+  if(!mfrc522.PICC_IsNewCardPresent()) {
+    return 0;
+  }
+  if(!mfrc522.PICC_ReadCardSerial()) {
+    return 0;
+  }
+  
+  byteArray_to_string(mfrc522.uid.uidByte, mfrc522.uid.size, str);
+  UID_Result = str;
+  
+  mfrc522.PICC_HaltA();
+  mfrc522.PCD_StopCrypto1();
+  
+  return 1;
+}
+//________________________________________________________________________________
+
+//________________________________________________________________________________byteArray_to_string()
+void byteArray_to_string(byte array[], unsigned int len, char buffer[]) {
+  for (unsigned int i = 0; i < len; i++) {
+    byte nib1 = (array[i] >> 4) & 0x0F;
+    byte nib2 = (array[i] >> 0) & 0x0F;
+    buffer[i*2+0] = nib1  < 0xA ? '0' + nib1  : 'A' + nib1  - 0xA;
+    buffer[i*2+1] = nib2  < 0xA ? '0' + nib2  : 'A' + nib2  - 0xA;
+  }
+  buffer[len*2] = '\0';
+}
+//________________________________________________________________________________
+
+//________________________________________________________________________________VOID SETUP()
+void setup(){
+  // put your setup code here, to run once:
+
+  Serial.begin(115200);
+  Serial.println();
+  delay(1000);
+
+  // Init SPI bus.
+  SPI.begin();      
+  // Init MFRC522.
+  mfrc522.PCD_Init(); 
+
+  delay(1000);
+
+  Serial.println();
+  Serial.println("Please tap your card or key chain to the RFID-RC522 module.");
+}
+//________________________________________________________________________________
+
+//________________________________________________________________________________VOID LOOP()
+void loop(){
+  // put your main code here, to run repeatedly:
+  
+  readsuccess = getUID();
+ 
+  if(readsuccess){
+    Serial.println();
+    Serial.print("UID : ");
+    Serial.println(UID_Result);
+    delay(2000);
+  }
+  delay(10);
+}
+//________________________________________________________________________________
+//<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<