RFID and NFC Access Prototype
Read tag identifiers and design a safer allowlisted access prototype without treating UID as a secret.
Topology and objective
RFID/NFC reader → MCU allowlist → simulated output and audit event.
Hardware and tools
- Supported development board
- USB data cable
- Current-limited supply
- Serial monitor and logic analyser when applicable
Security and RF safety
- Tag UIDs can be copied and are not passwords.nDo not collect identity without consent.nKeep this lab disconnected from real doors or payment systems.
Practical procedure
- Wire SPI or I2C reader at correct logic voltage.nRead a lab tag and record technology/type.nCompare against a test allowlist.nDrive an LED only; do not control a real lock.nTest unknown and repeated tag behaviour.
Telemetry / payload
{"reader":"lab-1","event":"tag_seen","uid_hash":"demo-a91f","allowed":false}Starter code / config
Hash or tokenise identifiers in logs; use stronger credentials for real access control.Expected results
| Checkpoint | Expected | Tool |
|---|---|---|
| Known tag | Test LED and audit event | SerialnUnknown tag |
Troubleshooting
| Symptom | Check | Action |
|---|---|---|
| No tag | Check antenna, interface and voltage | Test at close rangenDuplicate reads |
Local-only sandbox
Commands & telemetry simulator
Send command
Simulator ready. No network connection is used.