Hacking an Amazon Touchscreen Door Lock to add NFC and wireless remote unlock capability using an ESP32-S3.
Office door auto-locks after 5 seconds. Getting up every time someone knocks is annoying. The touchscreen is slow to wake up. Needed a smarter solution.
- 📱 NFC tap — phone sticker through the hollow door
- 🔲 QIACHIP remote — slim 4-button remote from desk
- 🔢 Existing touchscreen — unchanged, still works normally
| Part | Purpose |
|---|---|
| ESP32-S3 | Main brain |
| PN532 NFC Module | Reads phone tap through door |
| QIACHIP 433MHz Kit | Slim remote + receiver |
| 5V Relay | Triggers lock motor |
| 5000mAh Li-Po + TP4056 | Rechargeable battery via USB-C |
~$97 in parts
The full interactive build guide with wiring diagrams, routing diagram, complete code and step-by-step phases is hosted at the link above.