diff --git a/Audio/mixkit-gaming-lock-2848.wav b/Audio/mixkit-gaming-lock-2848.wav
new file mode 100644
index 0000000..d079479
Binary files /dev/null and b/Audio/mixkit-gaming-lock-2848.wav differ
diff --git a/firmware.ino b/firmware.ino
new file mode 100644
index 0000000..b6f863c
--- /dev/null
+++ b/firmware.ino
@@ -0,0 +1,104 @@
+#include <Arduino.h>
+
+#include <Wire.h>
+#include <PN532_I2C.h>
+#include <PN532.h>
+
+PN532_I2C pn532i2c(Wire);
+PN532 nfc(pn532i2c);
+
+#define Serial USBSerial
+
+#include <PN532_debug.h>
+
+uint8_t        _prevIDm[8];
+unsigned long  _prevTime;
+
+void setup(void)
+{
+  delay(1000);
+  Serial.begin(115200);
+  Serial.println("Hello!");
+  Wire.setPins(4, 5);
+
+  nfc.begin();
+
+  uint32_t versiondata = nfc.getFirmwareVersion();
+  if (!versiondata)
+  {
+    Serial.print("Didn't find PN53x board");
+    while (1) {delay(10);};      // halt
+  }
+
+  // Got ok data, print it out!
+  Serial.print("Found chip PN5"); Serial.println((versiondata >> 24) & 0xFF, HEX);
+  Serial.print("Firmware ver. "); Serial.print((versiondata >> 16) & 0xFF, DEC);
+  Serial.print('.'); Serial.println((versiondata >> 8) & 0xFF, DEC);
+
+  // Set the max number of retry attempts to read from a card
+  // This prevents us from waiting forever for a card, which is
+  // the default behaviour of the PN532.
+  nfc.setPassiveActivationRetries(0xFF);
+  nfc.SAMConfig();
+
+  memset(_prevIDm, 0, 8);
+}
+
+void loop(void)
+{
+  uint8_t ret;
+  uint16_t systemCode = 0xFFFF;
+  uint8_t requestCode = 0x00;       // System Code request
+  uint8_t idm[8];
+  uint8_t pmm[8];
+  uint16_t systemCodeResponse;
+
+  // Wait for an FeliCa type cards.
+  // When one is found, some basic information such as IDm, PMm, and System Code are retrieved.
+  Serial.print("F");
+  ret = nfc.felica_Polling(systemCode, requestCode, idm, pmm, &systemCodeResponse, 5);
+
+  if (ret == 1) {
+    if ( memcmp(idm, _prevIDm, 8) == 0 ) {
+      if ( (millis() - _prevTime) < 3000 ) {
+        delay(5);
+        return;
+      }
+    }
+
+    Serial.println("\nFound a Felica card!");
+    printUid(idm, 8);
+
+    memcpy(_prevIDm, idm, 8);
+    _prevTime = millis();
+    return;
+  }
+  
+  Serial.print("M");
+  uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID
+  uint8_t uidLength;                        // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
+
+  if (nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength, 5)) {
+    // Check if the same card is present
+    if (memcmp(uid, _prevIDm, uidLength) == 0 && (millis() - _prevTime) < 3000) {
+      delay(5);
+      return;
+    }
+
+    Serial.println("\nFound a MIFARE card!");
+    printUid(uid, uidLength);
+
+    memcpy(_prevIDm, uid, uidLength);
+    _prevTime = millis();
+    return;
+  }
+}
+
+void printUid(uint8_t* uid, uint8_t uidLength) {
+  Serial.print("UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
+  Serial.print("UID Value: ");
+  for (uint8_t i = 0; i < uidLength; i++) {
+    Serial.print(uid[i], HEX);
+  }
+  Serial.println("");
+}
diff --git a/receiver.py b/receiver.py
new file mode 100644
index 0000000..094415c
--- /dev/null
+++ b/receiver.py
@@ -0,0 +1,65 @@
+from pathlib import Path
+import time
+import serial
+import re
+from playsound import playsound
+from pynput.keyboard import Key, Controller
+
+keyboard = Controller()
+
+# Configure your serial port and baud rate
+SERIAL_PORT = 'COMx'  # Replace 'COMx' with your serial port (e.g., 'COM3' on Windows or '/dev/ttyUSB0' on Linux)
+# SERIAL_PORT = '/dev/ttyACM0'
+BAUD_RATE = 115200
+PATH = Path('C:/MUGS/felica.txt')
+# PATH = Path('/tmp/felica.txt')
+
+AUDIO_EFFECT = Path(__file__).parent / 'Audio/tofu.wav'
+
+def parse_uid(data):
+    """
+    Parse the UID from the serial data.
+    """
+    uid_value_match = re.search(r'UID Value: ([0-9A-F]+)', data)
+
+    if uid_value_match:
+        uid = uid_value_match.group(1)
+        
+        # If UID is not 8 bytes, pad it with zeros
+        if len(uid) < 16:
+            uid = uid.zfill(16)
+        
+        # If the UID Doesn't start with 01 2E, set it to 01 2E
+        if uid[:4] != '012E':
+            uid = '012E' + uid[4:]
+        
+        # Write the UID to the file
+        print(f"UID: {uid}")
+        PATH.write_text(uid)
+        
+        # Play audio effect
+        playsound(str(AUDIO_EFFECT))
+        
+        # Press ENTER button
+        keyboard.press(Key.enter)
+        time.sleep(0.5)
+        keyboard.release(Key.enter)
+        
+        return uid
+    
+
+if __name__ == "__main__":
+    ser = serial.Serial(SERIAL_PORT, BAUD_RATE, timeout=1)
+    print(f"Listening on {SERIAL_PORT}...")
+
+    try:
+        while True:
+            if ser.in_waiting > 0:
+                line = ser.readline().decode('utf-8', errors='replace').strip()
+                print(line)
+                parse_uid(line)
+                    
+    except KeyboardInterrupt:
+        print("Exiting...")
+    finally:
+        ser.close()
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..66e805c
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,3 @@
+pyserial
+playsound
+pynput
\ No newline at end of file