1. Introduction
This manual provides detailed instructions for the installation, setup, and operation of your new Tuya Wifi Palm Vein Smart Door Lock. This advanced digital electronic security mortise lock offers multiple unlocking methods and smart features for enhanced home and office security. Please read this manual thoroughly before installation and use to ensure proper function and safety.

2. Safety Information
- Do not attempt to disassemble or repair the lock yourself. Refer to qualified technicians.
- Keep the lock away from water and direct sunlight to prevent damage.
- Ensure the battery is charged regularly to avoid lockout situations.
- Do not use corrosive cleaners on the lock surface.
- Always keep your mechanical keys in a safe, accessible location outside the property for emergency access.
3. Package Contents
Verify that all components are present before beginning installation:
- Smart Door Lock (Front and Rear Panels)
- Mortise Lock Body
- Strike Plate and Strike Box
- Mounting Screws and Accessories
- Mechanical Keys
- Type-C USB Cable (for emergency power)
- Installation Template
- User Manual (this document)

4. Specifications
| Feature | Description |
|---|---|
| Model Number | HYX-HV20 / HV20 |
| Unlocking Methods | Palm Vein, Face Recognition, Fingerprint, Card, Remote Control, Mechanical Keys, Password, App, WiFi |
| Special Features | Built-in Doorbell, Built-in Camera, Built-in Peephole, Built-in Screen, Two-way Audio, Built-in Gateway |
| Power Supply | Built-in Rechargeable 5V Lithium Battery (5000mAh) |
| Emergency Power | Type-C USB Port |
| Fit Door Thickness | 40-120MM |
| Suitable Door Type | Wooden Door, Steel Door, Brass Door, Stainless Steel Door |
| Suitable for Mortise | 6068 |
| Handle Direction | Reversible |
| Capacity | 100 Fingerprints / 100 Cards / 100 Passwords |
| Working Temperature | -20°C to 60°C |
| Connectivity | WiFi, Bluetooth |
| Smart Home Platform | Tuya |
| Certifications | CE, FCC, RoHS |
5. Installation
5.1 Door Preparation
Before installing the lock, ensure your door meets the following requirements:
- Door Thickness: 40-120MM
- Mortise Type: Compatible with 6068 mortise.
Use the provided installation template to mark and drill holes on your door. Ensure precise measurements for optimal fit.

5.2 Lock Installation Steps
- Install the mortise lock body into the prepared door edge.
- Attach the front panel of the smart lock, ensuring cables are routed correctly.
- Connect the cables from the front panel to the rear panel.
- Secure the rear panel to the door.
- Install the strike plate and strike box on the door frame.
- Test the mechanical operation of the lock with the key.
5.3 Handle Direction Reversal
The handle direction is reversible. If needed, adjust the handle orientation according to your door's opening direction during installation.
6. Initial Setup and Configuration
6.1 Initial Power-Up and Administrator Password
Upon first power-up, you will need to set an administrator password. Follow the on-screen prompts or voice guidance.
6.2 Accessing the Menu
To access the lock's settings menu:
- Press `*` then `#` on the keypad.
- Verify the management user (e.g., enter administrator password).
- Enter the master code, then press `#`.
6.3 Human Face Recognition Setting
Configure human face recognition settings via the menu:

- Access the menu (as per 6.2).
- Select `2. Installation settings`.
- Select `4. Human face setting`.
- Adjust the following options:
- `1. Humen induction`: Set to `Smart` for automatic detection.
- `2. Induction distance`: Set to `Middle` for balanced detection range.
- `3. Induction speed`: Set to `Middle` for balanced speed.
- `4. Recognition prompt`: Set to `Open` for audible prompts.
Tip: If there are many people passing by the lock, it is suggested to set the induction to `LOW` to prevent frequent activations.
6.4 Installation Settings (Lock Open Direction, Automatic Lockout)
Configure installation-specific settings:

- Access the menu (as per 6.2).
- Select `2. Installation settings`.
- Lock Open Direction Setting: Press `1` to set the lock's open direction.
- Automatic Lockout: Press `2` to set up the automatic lockout function and torque sensitivity. Choose `Low`, `Middle`, or `High` torque. Ensure the lock is properly closed for this function to work.
6.5 Lock Settings (Anti-Skid Alarm, Torque, Auto Lockout Time)
Configure lock behavior settings:

- Access the menu (as per 6.2).
- Select `2. Installation settings`.
- Select `3. Lock setting`.
- Anti-Skid Alarm Setting: Press `1` to set up the Anti-Skid Alarm. The lock will sound an alarm if someone attempts to pick it. If the lock is connected to the network, an alarm message will be sent to the manager.
- Torque Setting: Press `2` to set the motor torque force value. Options are `Low`, `Middle`, and `High`.
- Automatic Lockout Time: Press `3` to set the automatic lockout time. The time range can be set from 2 to 9 seconds.
6.6 Connecting to Tuya/Graffiti APP (WiFi)
To connect your smart lock to the Tuya/Graffiti APP for remote management:
- On the Smart Lock:
a. Press `*#` to enter the menu.
b. Enter the administrator password and press `#`.
c. Press `2` for Remote Management.
d. Press `1` to Add Remote Users.
e. Press `1` again for WiFi. The lock will enter pairing mode. - On your Smartphone:
a. Open the Tuya/Graffiti APP.
b. Press the top right corner `+` to Add Device.
c. Select `Camera & Lock`, then choose `Door Lock (WiFi)`.
d. Follow the in-app instructions to connect the lock to your WiFi network.
7. Operating Instructions
7.1 Unlocking Methods
Your smart lock supports multiple ways to unlock:
- Palm Vein Identification: Place your palm over the sensor for identification. This method is highly secure as palm blood flow patterns cannot be copied.
- 3D Face Recognition: Stand in front of the lock for quick face scanning.
- Fingerprint Unlock: Place your registered finger on the fingerprint sensor for 0.4-second quick unlock.
- Keypad (Password): Enter your registered password on the keypad.
- Card: Present a registered card to the card reader.
- Mechanical Keys: Use the physical key as a backup.
- App: Remotely unlock the door via the Tuya/Graffiti APP.

7.2 Doorbell Function
Press the doorbell button on the keypad. The smart lock will ring the bell, and if connected to the app, a video call notification will be sent to your smartphone.

7.3 Automatic Lock
After entering or leaving the door, simply pull it casually, and the lock tongues will automatically pop out, securing the door.
7.4 Mechanical Anti-Lock Knob
The mechanical anti-lock knob prevents the door from being unlocked from the outside by non-indoor staff, adding an extra layer of security.
7.5 Emergency Quick-Open
In case of an emergency, turn the mechanical quick-open handle to open the door immediately from the inside.

7.6 Remote Unlocking via App
Once the lock is connected to the Tuya/Graffiti APP, you can remotely unlock the door. When someone rings the doorbell, you will receive a notification on your phone, allowing you to view the live feed and unlock the door remotely.
7.7 Low Voltage Warning
When the battery voltage drops below 25%, the lock will issue a voice warning. The battery power will still allow approximately 50 unlocks before completely depleting. It is recommended to charge the battery promptly.
7.8 Emergency Power
If the battery runs out completely, you can connect a Type-C USB cable to the emergency power interface on the lock and connect it to an external power source (e.g., power bank). This will provide enough power to unlock the lock for about 30 seconds.

7.9 Illegal User Alarm
If an unauthorized user attempts to unlock the door by inputting incorrect information (face, fingerprint, password, or MF cards) 5 consecutive times, the lock will trigger an alarm. It will also block further attempts for 90 seconds and send an alert message to the registered lock manager via the app. The lock will recover to normal status after 90 seconds.
8. Maintenance
- Cleaning: Wipe the lock surface with a soft, dry cloth. Avoid using abrasive cleaners or solvents that could damage the finish or electronic components.
- Battery Care: Recharge the built-in lithium battery regularly. Avoid letting the battery completely drain for extended periods to prolong its lifespan.
- Sensor Maintenance: Keep the fingerprint, face recognition, and palm vein sensors clean and free of dust or smudges for optimal performance.
- Mechanical Parts: Periodically check the mortise and handle for smooth operation. Lubricate if necessary with a suitable lubricant, avoiding contact with electronic parts.
9. Troubleshooting
9.1 Lock Not Responding
- Check if the battery is charged. If not, use the Type-C emergency power.
- Ensure the lock is properly installed and all connections are secure.
9.2 Unlocking Methods Not Working
- Fingerprint/Face/Palm Vein: Ensure the sensor/camera is clean and your registered data is correctly captured. Try re-registering if issues persist.
- Password: Double-check the entered password. Ensure the keypad is clean and responsive.
- Card: Ensure the card is correctly registered and placed close to the reader.
9.3 App Connection Issues
- Ensure your home WiFi network is stable and the lock is within range.
- Verify that the Tuya/Graffiti APP is updated to the latest version.
- Try restarting your router, smartphone, and the smart lock.
- If pairing fails, try resetting the lock to factory settings and re-pairing.
9.4 Frequent False Alarms
- Adjust the Anti-Skid Alarm sensitivity in the lock settings if available.
- Ensure the door is properly closed and latched.
9.5 Low Battery Warning Persists After Charging
- Ensure the Type-C cable and power source are functioning correctly.
- Allow sufficient time for the battery to charge. If the issue persists, the battery may need replacement.
10. User Tips
- Door Compatibility: Before purchasing or installing, always verify that the lock's specifications (e.g., door thickness, mortise type) are compatible with your existing door.
- Regular Backups: Keep your mechanical keys in a secure, easily accessible location outside your home for emergency entry.
- App Notifications: Enable push notifications for the Tuya/Graffiti app to receive real-time alerts for doorbell rings, illegal entry attempts, and low battery warnings.
- Administrator Management: Regularly review and update registered users and their access permissions through the administrator menu or the app.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.





