Organize project: Move old code and documentation to oldcode folder, add comprehensive README

rfid_module.py

@@ -0,0 +1,52 @@
+"""
+RFID reader initialization and handling
+"""
+
+import logging
+from config_settings import SERIAL_DEVICES, CONFIG_CARD_ID
+from logger_module import log_with_server
+
+
+def initialize_rfid_reader():
+    """
+    Initialize RFID reader with multiple device attempts and error handling
+    
+    Returns:
+        Reader object or None if initialization fails
+    """
+    try:
+        from rdm6300 import Reader
+    except ImportError:
+        print("✗ rdm6300 module not installed")
+        return None
+    
+    print("Initializing RFID reader...")
+    
+    for device in SERIAL_DEVICES:
+        try:
+            print(f"Attempting to initialize RFID reader on {device}...")
+            r = Reader(device)
+            r.start()
+            print(f"✓ RFID reader successfully initialized on {device}")
+            return r
+            
+        except FileNotFoundError:
+            print(f"✗ Device {device} not found")
+            continue
+        except PermissionError:
+            print(f"✗ Permission denied for {device}")
+            print(f"  Hint: Try adding user to dialout group: sudo usermod -a -G dialout $USER")
+            continue
+        except Exception as e:
+            print(f"✗ Failed to initialize on {device}: {e}")
+            continue
+    
+    # If we get here, all devices failed
+    print("✗ Could not initialize RFID reader on any device")
+    print("Available solutions:")
+    print("  1. Check hardware connections")
+    print("  2. Enable UART: sudo raspi-config -> Interface Options -> Serial")
+    print("  3. Add user to dialout group: sudo usermod -a -G dialout $USER")
+    print("  4. Reboot the system after making changes")
+    
+    return None