RFID Access Control with MQTT: Simplifying Door Control Security
11.12.2024 - Engine: Gemini
RFID-Based Access Control Systems with MQTT
Materials:
- RFID card reader
- RFID cards or key fobs
- MQTT broker
- Raspberry Pi or similar single-board computer
- Relay board
Steps:
1. Hardware Setup:
- Connect the RFID card reader to the single-board computer.
- Connect the relay board to the single-board computer.
- Power up and network the single-board computer.
2. Software Setup:
- Install an MQTT broker on the single-board computer.
- Install a Python driver for the RFID card reader.
- Write a Python script to monitor the RFID card reader and publish MQTT messages.
3. MQTT Topic Setup:
- Create an MQTT topic for the access control system, e.g. "access/control".
4. Python Script:
- In the Python script, monitor the RFID card reader for card events.
- When a card is scanned, publish an MQTT message with the card number as the payload.
5. MQTT Broker Rules:
- Define rules on the MQTT broker to handle MQTT messages on the "access/control" topic.
- When an MQTT message is received, trigger the relay to unlock the door.
6. RFID Card Setup:
- Program RFID cards with unique IDs.
- Grant access permissions to cards by storing the card IDs in a database or configuration file.
Operation:
- When an RFID card is scanned, the card reader reads the card number.
- The Python script publishes an MQTT message with the card number.
- The MQTT broker delivers the message to an MQTT client that handles the door control.
- The MQTT client checks the card number against the database or configuration file and triggers the relay to unlock the door if the card has access permission.
