RFID reading and authorization

cloud/app.py

@@ -6,6 +6,7 @@ import base64
 import asyncio
 import fcntl
 import atexit
+import re
 from datetime import datetime, timedelta, timezone
 from flask import Flask, Response, request, jsonify, current_app, abort, g
 from pymongo import MongoClient, ASCENDING, DESCENDING
@@ -45,6 +46,7 @@ alert_collection = db["alert_data"]
 webex_tokens_collection = db["webex_tokens"]
 device_ip_collection = db["device_ips"]
 cve_audit_results = db["cve_audit_results"]
+rfid_cards_collection = db["rfid_cards"]
 
 # Initialize Database Indexes
 def init_db_indexes():
@@ -490,6 +492,52 @@ def run_cve_audit():
         "timestamp": datetime.now(timezone.utc).isoformat()
     }), status_code
 
+@app.route("/rfid-card", methods=["GET"])
+def get_rfid_cards():
+    """OData compliant endpoint for technician RFID card validation."""
+    filter_str = request.args.get("$filter", "")
+    card_id = request.args.get("card_id")
+
+    mongo_query = {}
+
+    # Extract card_id from OData $filter string if not supplied directly
+    if not card_id and filter_str:
+        match = re.search(r"(?:card_id|cardId)\s+eq\s+['\"]([^'\"]+)['\"]", filter_str, re.IGNORECASE)
+        if match:
+            card_id = match.group(1)
+        else:
+            # Generic fallback to extract quoted strings
+            generic_match = re.search(r"['\"]([a-zA-Z0-9]+)['\"]", filter_str)
+            if generic_match:
+                card_id = generic_match.group(1)
+
+    if card_id:
+        mongo_query["card_id"] = card_id
+
+    # Filter for active/valid cards only
+    mongo_query["valid"] = True
+
+    try:
+        cards = list(rfid_cards_collection.find(mongo_query))
+        
+        result_value = [
+            {
+                "id": str(card["_id"]),
+                "card_id": card.get("card_id"),
+                "valid": card.get("valid", False)
+            }
+            for card in cards
+        ]
+
+        return jsonify({
+            "@odata.context": f"{request.host_url.rstrip('/')}/$metadata#RfidCards",
+            "value": result_value
+        }), 200
+
+    except Exception as e:
+        current_app.logger.exception("Error querying rfid_cards collection")
+        return jsonify({"@odata.error": {"code": "500", "message": "Database query error"}}), 500
+
 # ---------------------------------------------------------
 # Debug Endpoints (Protected)
 # ---------------------------------------------------------
@@ -570,11 +618,18 @@ def odata_metadata():
         <Property Name="webex_status" Type="Edm.String"/>
         <Property Name="sms_sent" Type="Edm.Boolean"/>
     </EntityType>
+    <EntityType Name="RfidCard">
+        <Key><PropertyRef Name="id"/></Key>
+        <Property Name="id" Type="Edm.String" Nullable="false"/>
+        <Property Name="card_id" Type="Edm.String" Nullable="false"/>
+        <Property Name="valid" Type="Edm.Boolean" Nullable="false"/>
+      </EntityType>
       <EntityContainer Name="Container">
         <EntitySet Name="Telemetry" EntityType="MicrowaveNetwork.Telemetry"/>
         <EntitySet Name="CookingParams" EntityType="MicrowaveNetwork.CookingParams"/>
         <EntitySet Name="CveAudit" EntityType="MicrowaveNetwork.CveAudit"/>
         <EntitySet Name="Alerts" EntityType="MicrowaveNetwork.Alert"/>
+        <EntitySet Name="RfidCards" EntityType="MicrowaveNetwork.RfidCard"/>
       </EntityContainer>
     </Schema>
   </edmx:DataServices>

orchestrateur/README.md

@@ -3,3 +3,10 @@
 
 - AP (dynamic) : `10.110.0.190`
 - Generated Wifi : `192.168.50.1`
+
+# RFID
+
+## Cards
+
+- 2700423026
+- 270042302B

orchestrateur/main.py

@@ -5,13 +5,12 @@ import asyncio
 import requests
 
 from shared.microwave_state import MicrowaveState, MicrowaveStateFields
-from orchestrateur.sensors import gps
 from shared import get_lora, get_mqtt_client, deviceTypes, config, payloads, db
 from shared.logging import log
 from shared.cookingState import CookingStates
 from shared.lora_device import LoraCommands
 from shared.alerts import AlertManager, Alert, AlertType
-from sensors import ultrasonicRanger, temp_hum, button, camera, buzzer, rgb_lcd
+from sensors import ultrasonicRanger, temp_hum, button, camera, buzzer, rgb_lcd, gps, rfid_reader
 from lib.systemd_logs import get_systemd_logs
 from external_display_manager import DisplayManager
 from rgb_lcd_manager import RGBLCDManager
@@ -21,6 +20,7 @@ rgb_lcd.setText("SmartWave\nOrchestrateur")
 
 # --- CONFIGURATION CONSTANTS ---
 DISPLAY_DEBOUNCE_SECONDS = 3  # Seconds to wait after first change before broadcasting
+TECHNICIAN_MODE = False
 
 # --- DB SETUP ---
 DB_PATH = "orchestrateur/db.sqlite"
@@ -145,6 +145,9 @@ mqtt_client.connect()
 mqtt_client.subscribe(config.MQTT_TOPIC_SENSOR, qos=config.MQTT_QOS)
 mqtt_client.subscribe(config.MQTT_TOPIC_HELLO, qos=config.MQTT_QOS)
 
+# RFID reader
+rfid = rfid_reader.RFIDReader(rx_pin=17)
+
 # DHT sensor warmup
 time.sleep(2)  # Allow GrovePi MCU and DHT sensor circuits to settle post-service start
 temp_hum.get_temperature_and_humidity()  # Dummy read to flush initial NaN state
@@ -174,7 +177,7 @@ if hasattr(cloud_mqtt_client._client, "loop_start"):
     print("[MQTT Cloud] Paho background loop started.")
 
 
-# --- BACKGROUND TASKS (PRODUCERS) ---
+# --- BACKGROUND TASKS ---
 async def lora_listener_task():
     """Polls LoRa and pushes to the async queue."""
     print("[LoRa] Async listener started.")
@@ -230,32 +233,47 @@ async def cloud_mqtt_listener_task():
             })
         await asyncio.sleep(0.1)
         
-# === LCD DISPLAY ===
+async def rfid_listener_task():
-def on_screens_change(screens, is_removed: bool, modified_name: str):
+    """Polls RFID reader, verifies cards via OData API, and toggles TECHNICIAN_MODE."""
-    """Callback for when screens are added or removed."""
+    global TECHNICIAN_MODE
-    log(f"[DisplayManager] Screens changed. Current screens: {list(screens.keys())}")
+    print("[RFID] Async task started on GPIO 17.")
-    rgb_lcd_manager.set_external_screen_count(len(screens))
     
-    # Add Or remove from database of connected components
+    last_scanned_tag = None
-    # 1. Extract id from name (assuming format "smartwave-epaper-<id>._displaytcp._tcp.local")
+    last_scan_time = 0
-    display_id = modified_name.split("-")[-1].split(".")[0]
-    if is_removed:
-        remove_connected_component(display_id)
-    else:
-        save_connected_component(display_id, "external_display")
 
-display_manager.set_on_screens_change_callback(on_screens_change)
+    while True:
+        try:
+            # Quick non-blocking read via pigpio IPC
+            tag_id = await asyncio.to_thread(rfid.read_tag)
+            current_time = time.time()
 
-def update_lcd_microwave_count():
+            if tag_id:
-    """Updates the LCD with the current number of connected microwaves."""
+                # Debounce same tag within 3 seconds to avoid spamming the API
-    global microwave_states
+                if tag_id == last_scanned_tag and (current_time - last_scan_time) < 3.0:
-    count = len(microwave_states)
+                    await asyncio.sleep(0.1)
-    rgb_lcd_manager.set_microwave_count(count)
+                    continue
 
-def update_lcd_cloud_alert():
+                last_scanned_tag = tag_id
-    """Updates the LCD with the current cloud connectivity status."""
+                last_scan_time = current_time
-    global cloud_alert
+                print(f"[RFID] Tag detected: {tag_id}. Verifying with API...")
-    rgb_lcd_manager.set_cloud_alert(cloud_alert)
+
+                is_valid = await check_rfid_card_api(tag_id)
+
+                if is_valid:
+                    TECHNICIAN_MODE = True
+                    print(f"[RFID] Card {tag_id} VALIDATED! -> TECHNICIAN_MODE = TRUE")
+                    # Optional: Sound positive feedback beep
+                    buzzer.buzzer_siren(beatsNb=1)
+                else:
+                    print(f"[RFID] Card {tag_id} REJECTED / Invalid.")
+                    # Optional: Sound error feedback beep
+                    buzzer.buzzer_siren(beatsNb=2)
+
+        except Exception as e:
+            print(f"[RFID Task] Error reading RFID tag: {e}")
+
+        # Sleep 100ms between checks to keep CPU usage near zero
+        await asyncio.sleep(0.1)
 
 async def display_broadcast_worker_task():
     """
@@ -289,6 +307,136 @@ async def display_broadcast_worker_task():
             cloud_alert=cloud_alert
         )
         
+async def process_messages_task():
+    """Consumes the unified event queue."""
+    # Helper to normalize config topics to str
+    def to_str(val):
+        return val.decode('utf-8') if isinstance(val, bytes) else val
+    
+    while True:
+        msg = await async_event_queue.get()
+        source = msg["source"]
+        data = msg["data"]
+        
+        if source == "LoRa":
+            if "new_cooking_state" in data.get("data", {}):
+                mw_id = data["data"].get("id")
+                n_state = data["data"].get("new_cooking_state")
+                print(f"[LoRa] Microwave {mw_id} state changed to: {n_state}")
+                
+                microwave_states[mw_id].set_cooking_state(n_state)
+                update_lcd_microwave_count()    # Update the LCD with new microwave count
+                
+                if n_state in (CookingStates.DONE, CookingStates.STIRRING_REQUIRED, CookingStates.ALERT):
+                    beats = 5 if n_state == CookingStates.ALERT else (1 if n_state == CookingStates.STIRRING_REQUIRED else 3)
+                    buzzer.buzzer_siren(beatsNb=beats)
+                if n_state == CookingStates.IDLE and microwave_states.get(mw_id).state == MicrowaveState.COOKING:
+                    microwave_states[mw_id].set_state(MicrowaveState.DONE)
+                    print(f"[{mw_id}] Cooking finished. Waiting for user to remove dish.")
+            if "action" in data.get("data", {}):
+                if type(data["data"]) != dict:
+                    print(f"[LoRa] Invalid data format received: {data['data']}")
+                    continue
+                action = data["data"]["action"]
+                if action == LoraCommands.COOKING_UPDATE:
+                    mw_id = data["data"].get("id")
+                    if mw_id in microwave_states:
+                        state_info = data["data"]
+                        microwave_states[mw_id].set_cooking_state(state_info.get("cooking_state", microwave_states[mw_id].cooking_state))
+                        microwave_states[mw_id].set_cooking_estimated_remaining_time(state_info.get("estimated_remaining_time", microwave_states[mw_id].cooking_estimated_remaining_time))
+                        microwave_states[mw_id].set_paused(state_info.get("paused", microwave_states[mw_id].paused))
+                elif action == LoraCommands.NEW_ALERT:
+                    alert_type = data["data"].get("alert_type")
+                    alert_message = data["data"].get("alert_message")
+                    alert = Alert(alert_type, alert_message, redistributed=True)
+                    alert_manager.add_alert(alert)
+                    print(f"[LoRa] New alert received: {alert.to_dict()}")
+                else:
+                    print(f"[LoRa] Unhandled action received: {action} with data: {data['data']}")
+        elif source == "MQTT":
+            topic = msg["topic"]
+
+            hello_topic = to_str(config.MQTT_TOPIC_HELLO)
+            sensor_topic = to_str(config.MQTT_TOPIC_SENSOR)
+            
+            if topic == hello_topic:
+                if data.get("id_orchestrator") != DEVICE_ID:
+                    component_id = data.get("id_microwave")
+                    component_type = data.get("type", deviceTypes.DEVICE_TYPES["MICROWAVE"])
+                    
+                    if component_id:
+                        print(f"[MQTT] Hello received from '{component_id}' ({component_type}). Updating DB & sending ACK.")
+                        # Offload DB insertion to async thread execution pool
+                        await asyncio.to_thread(save_connected_component, component_id, component_type)
+                        
+                        # Pass change callback to newly connected microwave
+                        microwave_states[component_id] = MicrowaveState(
+                            component_id, 
+                            on_change_callback=on_microwave_change
+                        )
+                        notify_display_update()         # Update the external screens
+                        update_lcd_microwave_count()    # Update the LCD with new microwave count
+                        
+                        mqtt_client.publish(
+                            config.MQTT_TOPIC_HELLO,
+                            payloads.mqtt_hello_ack(DEVICE_ID, component_id),
+                            qos=config.MQTT_QOS
+                        )
+            
+            elif topic == sensor_topic:
+                mw_id = str(data.get("id_microwave"))
+                print(f"[MQTT] Sensor data received for microwave {mw_id}: {data}")
+                
+                # Store IR data and notify the waiting dish handler
+                ir_data_cache[mw_id] = data
+                if mw_id in ir_data_events:
+                    ir_data_events[mw_id].set()
+
+        elif source == "CloudMQTT":
+            topic = msg["topic"]
+            print(f"[CloudMQTT] Command received on '{topic}': {data}")
+            
+            action = data.get("action")
+            
+            if action == "request_telemetry":
+                endpoint = data.get("endpoint")
+                if endpoint:
+                    # Schedule as a background task so processing the queue isn't stalled
+                    do_timeout = topic == "cmd/all"
+                    asyncio.create_task(handle_telemetry_request(endpoint, do_timeout=do_timeout))
+                else:
+                    print("[CloudMQTT] Received 'request_telemetry' but missing 'endpoint' field.")
+            else:
+                print(f"[CloudMQTT] Unknown action: {action}")
+
+# === LCD DISPLAY ===
+def on_screens_change(screens, is_removed: bool, modified_name: str):
+    """Callback for when screens are added or removed."""
+    log(f"[DisplayManager] Screens changed. Current screens: {list(screens.keys())}")
+    rgb_lcd_manager.set_external_screen_count(len(screens))
+    
+    # Add Or remove from database of connected components
+    # 1. Extract id from name (assuming format "smartwave-epaper-<id>._displaytcp._tcp.local")
+    display_id = modified_name.split("-")[-1].split(".")[0]
+    if is_removed:
+        remove_connected_component(display_id)
+    else:
+        save_connected_component(display_id, "external_display")
+    
+display_manager.set_on_screens_change_callback(on_screens_change)
+
+def update_lcd_microwave_count():
+    """Updates the LCD with the current number of connected microwaves."""
+    global microwave_states
+    count = len(microwave_states)
+    rgb_lcd_manager.set_microwave_count(count)
+    
+def update_lcd_cloud_alert():
+    """Updates the LCD with the current cloud connectivity status."""
+    global cloud_alert
+    rgb_lcd_manager.set_cloud_alert(cloud_alert)
+
+# --- Button ---
 def button_callback():
     """Button physical interrupt callback."""
     global button_state
@@ -428,6 +576,44 @@ async def handle_new_dish(microwave_id, detected_height):
     finally:
         ir_data_events.pop(microwave_id, None)
 
+# === API CALLS ===
+
+async def check_rfid_card_api(card_id: str) -> bool:
+    """Queries the OData API asynchronously to verify if card_id is valid."""
+    url = "https://smartwave.matthiasg.dev/rfid-card"
+    
+    params = {
+        "$filter": f"card_id eq '{card_id}'"
+    }
+    headers = {"Content-Type": "application/json"}
+    if API_KEY:
+        headers["X-API-Key"] = API_KEY
+
+    try:
+        response = await asyncio.to_thread(
+            requests.get,
+            url,
+            params=params,
+            headers=headers,
+            timeout=5
+        )
+        if response.status_code == 200:
+            set_cloud_alert(False)  # Clear cloud alert on success
+            data = response.json()
+            
+            if isinstance(data, dict):
+                items = data.get("value", data.get("data", []))
+                return len(items) > 0 if isinstance(items, list) else bool(data)
+            elif isinstance(data, list):
+                return len(data) > 0
+
+        return False
+
+    except Exception as e:
+        print(f"[RFID Task] OData API check error: {e}")
+        set_cloud_alert(True)  # Set cloud alert on API connection failure
+        return False
+
 async def request_cloud_cooking_plan(microwave_id, sensors_data):
     """Sends all data to the cloud with up to 3 retries (330s timeout for AI generation)."""
     global cloud_alert, alert_manager
@@ -535,107 +721,6 @@ async def request_cloud_cooking_plan(microwave_id, sensors_data):
     microwave_states[microwave_id].set_state(MicrowaveState.DONE)
 
 # --- MAIN LOGIC TASKS ---
-async def process_messages_task():
-    """Consumes the unified event queue."""
-    # Helper to normalize config topics to str
-    def to_str(val):
-        return val.decode('utf-8') if isinstance(val, bytes) else val
-    
-    while True:
-        msg = await async_event_queue.get()
-        source = msg["source"]
-        data = msg["data"]
-        
-        if source == "LoRa":
-            if "new_cooking_state" in data.get("data", {}):
-                mw_id = data["data"].get("id")
-                n_state = data["data"].get("new_cooking_state")
-                print(f"[LoRa] Microwave {mw_id} state changed to: {n_state}")
-                
-                microwave_states[mw_id].set_cooking_state(n_state)
-                update_lcd_microwave_count()    # Update the LCD with new microwave count
-                
-                if n_state in (CookingStates.DONE, CookingStates.STIRRING_REQUIRED, CookingStates.ALERT):
-                    beats = 5 if n_state == CookingStates.ALERT else (1 if n_state == CookingStates.STIRRING_REQUIRED else 3)
-                    buzzer.buzzer_siren(beatsNb=beats)
-                if n_state == CookingStates.IDLE and microwave_states.get(mw_id).state == MicrowaveState.COOKING:
-                    microwave_states[mw_id].set_state(MicrowaveState.DONE)
-                    print(f"[{mw_id}] Cooking finished. Waiting for user to remove dish.")
-            if "action" in data.get("data", {}):
-                if type(data["data"]) != dict:
-                    print(f"[LoRa] Invalid data format received: {data['data']}")
-                    continue
-                action = data["data"]["action"]
-                if action == LoraCommands.COOKING_UPDATE:
-                    mw_id = data["data"].get("id")
-                    if mw_id in microwave_states:
-                        state_info = data["data"]
-                        microwave_states[mw_id].set_cooking_state(state_info.get("cooking_state", microwave_states[mw_id].cooking_state))
-                        microwave_states[mw_id].set_cooking_estimated_remaining_time(state_info.get("estimated_remaining_time", microwave_states[mw_id].cooking_estimated_remaining_time))
-                        microwave_states[mw_id].set_paused(state_info.get("paused", microwave_states[mw_id].paused))
-                elif action == LoraCommands.NEW_ALERT:
-                    alert_type = data["data"].get("alert_type")
-                    alert_message = data["data"].get("alert_message")
-                    alert = Alert(alert_type, alert_message, redistributed=True)
-                    alert_manager.add_alert(alert)
-                    print(f"[LoRa] New alert received: {alert.to_dict()}")
-                else:
-                    print(f"[LoRa] Unhandled action received: {action} with data: {data['data']}")
-        elif source == "MQTT":
-            topic = msg["topic"]
-
-            hello_topic = to_str(config.MQTT_TOPIC_HELLO)
-            sensor_topic = to_str(config.MQTT_TOPIC_SENSOR)
-            
-            if topic == hello_topic:
-                if data.get("id_orchestrator") != DEVICE_ID:
-                    component_id = data.get("id_microwave")
-                    component_type = data.get("type", deviceTypes.DEVICE_TYPES["MICROWAVE"])
-                    
-                    if component_id:
-                        print(f"[MQTT] Hello received from '{component_id}' ({component_type}). Updating DB & sending ACK.")
-                        # Offload DB insertion to async thread execution pool
-                        await asyncio.to_thread(save_connected_component, component_id, component_type)
-                        
-                        # Pass change callback to newly connected microwave
-                        microwave_states[component_id] = MicrowaveState(
-                            component_id, 
-                            on_change_callback=on_microwave_change
-                        )
-                        notify_display_update()         # Update the external screens
-                        update_lcd_microwave_count()    # Update the LCD with new microwave count
-                        
-                        mqtt_client.publish(
-                            config.MQTT_TOPIC_HELLO,
-                            payloads.mqtt_hello_ack(DEVICE_ID, component_id),
-                            qos=config.MQTT_QOS
-                        )
-            
-            elif topic == sensor_topic:
-                mw_id = str(data.get("id_microwave"))
-                print(f"[MQTT] Sensor data received for microwave {mw_id}: {data}")
-                
-                # Store IR data and notify the waiting dish handler
-                ir_data_cache[mw_id] = data
-                if mw_id in ir_data_events:
-                    ir_data_events[mw_id].set()
-
-        elif source == "CloudMQTT":
-            topic = msg["topic"]
-            print(f"[CloudMQTT] Command received on '{topic}': {data}")
-            
-            action = data.get("action")
-            
-            if action == "request_telemetry":
-                endpoint = data.get("endpoint")
-                if endpoint:
-                    # Schedule as a background task so processing the queue isn't stalled
-                    do_timeout = topic == "cmd/all"
-                    asyncio.create_task(handle_telemetry_request(endpoint, do_timeout=do_timeout))
-                else:
-                    print("[CloudMQTT] Received 'request_telemetry' but missing 'endpoint' field.")
-            else:
-                print(f"[CloudMQTT] Unknown action: {action}")
 
 async def handle_telemetry_request(endpoint: str, do_timeout=True):
     """
@@ -787,7 +872,8 @@ async def main():
         cloud_mqtt_listener_task(),
         process_messages_task(),
         monitor_dish_height_task(),
-        display_broadcast_worker_task()
+        display_broadcast_worker_task(),
+        rfid_listener_task()  # <-- ADDED HERE
     )
 
 if __name__ == "__main__":
@@ -796,6 +882,7 @@ if __name__ == "__main__":
     except KeyboardInterrupt:
         print("\nArrêt manuel.")
     finally:
+        rfid.close()  # <-- ADDED CLEANUP HERE
         asyncio.run(display_manager.stop())
         if hasattr(mqtt_client._client, "loop_stop"):
             mqtt_client._client.loop_stop()

orchestrateur/requirements.txt

@@ -5,3 +5,5 @@ pyserial>=3.5,<4
 # sudo apt install -y python3-opencv
 # sudo apt install -y opencv-data
 zeroconf>=0.131.0
+# sudo apt install pigpio python3-pigpio
+# sudo systemctl enable pigpiod --now

orchestrateur/sensors/__init__.py

@@ -7,3 +7,4 @@ import sensors.gps as gps
 import sensors.camera as camera
 import sensors.buzzer as buzzer
 import sensors.rgb_lcd as rgb_lcd
+import sensors.rfid_reader as rfid_reader

orchestrateur/sensors/rfid_reader.py

@@ -0,0 +1,95 @@
+import time
+import pigpio
+from typing import Optional
+from sensors.lock import serial_lock
+
+
+class RFIDReader:
+    """
+    Grove 125kHz RFID Reader using bit-banged software serial on GPIO 17 (Pin 11).
+    Parses 14-byte frame: [0x02 STX] + [10 ASCII ID] + [2 ASCII Checksum] + [0x03 ETX]
+    """
+
+    def __init__(self, rx_pin: int = 17, baudrate: int = 9600):
+        self.rx_pin = rx_pin
+        self.baudrate = baudrate
+        self.buffer = bytearray()
+        self.pi = pigpio.pi()
+
+        if not self.pi.connected:
+            raise RuntimeError("pigpio daemon is not running. Run 'sudo systemctl start pigpiod'.")
+
+        with serial_lock:
+            self.pi.set_mode(self.rx_pin, pigpio.INPUT)
+            
+            # Clean up lingering serial sessions on this pin
+            try:
+                self.pi.bb_serial_read_close(self.rx_pin)
+            except pigpio.error:
+                pass
+            
+            self.pi.bb_serial_read_open(self.rx_pin, self.baudrate, 8)
+
+    def read_tag(self) -> Optional[str]:
+        """
+        Reads and accumulates bytes, returning the 10-digit Tag ID.
+        """
+        with serial_lock:
+            if not self.pi or not self.pi.connected:
+                return None
+
+            count, data = self.pi.bb_serial_read(self.rx_pin)
+            if count > 0:
+                self.buffer.extend(data)
+
+            # Look for Start-of-Text (0x02)
+            stx_idx = self.buffer.find(b"\x02")
+            
+            if stx_idx != -1:
+                # Discard noise prior to 0x02
+                if stx_idx > 0:
+                    self.buffer = self.buffer[stx_idx:]
+
+                # Wait for full 14-byte payload
+                if len(self.buffer) >= 14:
+                    raw_frame = self.buffer[:14]
+                    self.buffer = self.buffer[14:]  # Flush parsed frame
+
+                    # Verify End-of-Text (0x03)
+                    if raw_frame[-1] == 0x03:
+                        try:
+                            # Extract 10-character ID (indices 1 through 10)
+                            return raw_frame[1:11].decode("ascii")
+                        except UnicodeDecodeError:
+                            return None
+            else:
+                # Flush buffer if filled with noise without STX marker
+                if len(self.buffer) > 64:
+                    self.buffer.clear()
+
+        return None
+
+    def close(self):
+        with serial_lock:
+            if self.pi and self.pi.connected:
+                try:
+                    self.pi.bb_serial_read_close(self.rx_pin)
+                except pigpio.error:
+                    pass
+                self.pi.stop()
+
+
+if __name__ == "__main__":
+    reader = RFIDReader(rx_pin=17)
+    print("RFID Reader active on GPIO 17 (Pin 11). Swipe a tag...")
+
+    try:
+        while True:
+            tag = reader.read_tag()
+            if tag:
+                print(f"Scanned Tag ID: {tag}")
+            time.sleep(0.05)
+    except KeyboardInterrupt:
+        print("\nStopping reader.")
+    finally:
+        reader.close()