feat: add rfid interface

Author: TimNekk

src/rfid.py

@@ -0,0 +1,14 @@
+from lib.mfrc522 import MFRC522
+
+
+class RFIDInterface:
+    def __init__(self, sda_pin: int, sck_pin: int, mosi_pin: int, miso_pin: int, rst_pin: int):
+        self.__rfid = MFRC522(sck=sck_pin, miso=miso_pin, mosi=mosi_pin, cs=sda_pin, rst=rst_pin)
+
+    def read_card_id(self):
+        self.__rfid.init()
+        (stat, tag_type) = self.__rfid.request(self.__rfid.REQIDL)
+        if stat == self.__rfid.OK:
+            (stat, uid) = self.__rfid.SelectTagSN()
+            if stat == self.__rfid.OK:
+                return int.from_bytes(bytes(uid), "little", False)