Arduino - EM18 RFID Reader

In this Project, we will see about how to interface EM-18 RFID with Arduino.

Circuit Diagram:

Arduino Code:

rfid_receive_char_code.ino

void setup() {
  Serial.begin(9600);
}

void loop() {
  if (Serial.available() > 0) {
    char inChar = (char) Serial.read();
    Serial.println(inChar);
  }
}

rfid_receive_string_code.ino

boolean stringComplete = false;
String inputString = "";
int n = 0;
#define BUZZ 8

void setup() {
  Serial.begin(9600);
  pinMode(BUZZ, OUTPUT);
  inputString.reserve(200);
}

void loop() {
  if (stringComplete) {
    Serial.println(inputString);
    if (inputString.equals("180001493565")) { //A
      digitalWrite(BUZZ, HIGH);
    }
    if (inputString.equals("1300711F7508")) { //B
      digitalWrite(BUZZ, LOW);
    }

    stringComplete = false;
    inputString = "";
  }
}

void serialEvent() {
  while (Serial.available()) {
    n++;
    char inChar = (char) Serial.read();
    inputString += inChar;
    if (n >= 12) {
      n = 0;
      stringComplete = true;
    }
  }
}

Youtube Video Tutorial:

https://youtu.be/z-G-XbQ6pFc

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You can get the all the required files (like Circuit Diagram, Arduino.ino file, Libraries Used, and others) for the project  in ZIP format and much more...