1. Introduction
The Dhiedas MD121 WiFi Smart Door Lock with Camera offers advanced security and convenience for your home. This smart deadbolt integrates multiple unlocking methods, a high-definition camera, and two-way audio communication, all controllable via a mobile application or voice commands. This manual provides detailed instructions for installation, operation, maintenance, and troubleshooting to ensure optimal performance and security.
Figure 1: Key features of the Dhiedas MD121 Smart Door Lock.
2. Safety Information
- Read all instructions carefully before installation and use.
- Do not attempt to disassemble or repair the lock yourself. Contact customer support for assistance.
- Ensure the door and frame are structurally sound and properly aligned before installation.
- Keep physical keys in a secure location outside the home, accessible only for emergencies.
- Protect your passcodes and fingerprints from unauthorized access.
- Use only the specified charging cable and power source for the built-in battery.
3. Package Contents
Verify that all components are present before beginning installation:
- Dhiedas MD121 WiFi Smart Deadbolt Lock (Exterior and Interior Assemblies)
- 10000mAh Rechargeable Lithium-ion Battery (pre-installed)
- 4 x Physical Keys
- Installation Guide & User Manual
- Mounting Hardware (screws, bolts, strike plate)
- Installation Template
- Screwdriver
Figure 2: All parts included with the Dhiedas MD121 Smart Door Lock.
4. Product Overview
4.1 Exterior Assembly
- HD Camera: Provides clear video feed of your doorstep.
- Fingerprint Sensor: Biometric authentication for quick unlocking (supports up to 50 fingerprints).
- Keypad: For entering passcodes (supports up to 50 codes).
- Doorbell Button: Activates the integrated video doorbell.
- Keyhole: For emergency physical key access.
- USB-C Port: For emergency power supply.
4.2 Interior Assembly
- Thumb Turn: Manual locking/unlocking from the inside.
- Battery Compartment: Houses the 10000mAh rechargeable Lithium-ion battery.
- Reset Button: For factory reset.
5. Setup and Installation
The Dhiedas MD121 is designed for easy DIY installation on most US standard front doors, suitable for both left and right-handed doors without requiring additional drilling or a locksmith.
5.1 Pre-Installation Check
- Ensure your door thickness is between 1-3/8" (35mm) to 2-1/8" (55mm).
- Verify door backset is 2-3/8" (60mm) or 2-3/4" (70mm).
- Confirm door hole diameter is 2-1/8" (54mm) or 1-1/2" (38mm).
Figure 3: Door compatibility and dimensions.
5.2 Installation Steps
- Remove Existing Lock: Carefully remove your current deadbolt and handle set.
- Install Latch and Strike Plate: Insert the new latch into the door edge and secure it. Install the strike plate on the door frame.
- Install Exterior Assembly: Place the exterior assembly onto the door, ensuring the spindle passes through the latch.
- Install Mounting Plate: Secure the interior mounting plate to the door using screws, ensuring it aligns with the exterior assembly.
- Connect Cables: Connect the cable from the exterior assembly to the interior assembly.
- Install Interior Assembly: Attach the interior assembly to the mounting plate and secure it with screws.
- Insert Battery: Open the battery cover on the interior assembly and insert the 10000mAh rechargeable battery.
- Test Operation: Manually test the lock and unlock function to ensure smooth operation.
Video 1: Dhiedas fast installation of WiFi door lock. This video demonstrates the quick and easy installation process for the Dhiedas MD121 WiFi Smart Door Lock.
5.3 App Integration (Tuya App)
- Download App: Download the Tuya Smart app from your smartphone's app store.
- Create Account: Register for a new account or log in if you already have one.
- Add Device: Follow the in-app instructions to add your Dhiedas MD121 Smart Door Lock. Ensure your phone is connected to a 2.4GHz WiFi network during setup.
- Pairing: The app will guide you through the pairing process, which typically involves activating a pairing mode on the lock.
6. Operating Instructions
The Dhiedas MD121 offers six convenient ways to unlock your door:
6.1 Fingerprint Unlocking
- Enroll Fingerprints: Use the Tuya app to enroll up to 50 unique fingerprints. Follow the on-screen prompts for multiple scans to ensure accuracy.
- Unlock: Place your enrolled finger on the fingerprint sensor. The lock will unlock in approximately 0.2 seconds if the fingerprint is recognized.
Figure 4: Fingerprint sensor with AI chip for fast unlocking.
6.2 Passcode Unlocking
- Set Passcodes: Create and manage up to 50 passcodes (permanent or temporary) via the Tuya app.
- Unlock: Enter your 6-8 digit passcode on the keypad, then press the '#' key to confirm.
- Anti-Peeping Password: You can enter random digits before or after your actual passcode to prevent others from guessing your code.
Figure 5: Keyless entry with passcode options.
6.3 Tuya App Remote Control
- Remote Unlock/Lock: Open the Tuya app, select your smart lock, and tap the 'Unlock' or 'Lock' icon to control your door from anywhere with an internet connection.
- Real-time Notifications: Receive instant alerts for door activity, such as unlocks, lock status, and motion detection.
- Access Logs: View a history of who entered and when.
Figure 6: Remote control and voice assistant integration.
6.4 Alexa Voice Control
- Enable Skill: Link your Tuya Smart account with Amazon Alexa in the Alexa app.
- Voice Commands: Use commands like "Alexa, unlock the front door" (requires a voice code for security) or "Alexa, lock the front door."
6.5 Video Doorbell & Two-Way Audio
- Live View: Access the HD camera's live feed through the Tuya app at any time.
- Visitor Interaction: When someone presses the doorbell button, you'll receive a notification on your phone. You can then view the visitor and engage in two-way audio communication.
- Stay Detection: The lock can detect presence at the door (customizable 5-20 seconds) and trigger the app to take photos or record videos.
Figure 7: Two-way audio and video doorbell functionality.
Video 2: Dhiedas enjoy real time video and remotely unlock. This video demonstrates the real-time video and remote unlocking capabilities of the Dhiedas MD121 Smart Door Lock via the app.
6.6 Physical Key Unlocking
- Emergency Access: In case of battery depletion or electronic malfunction, slide open the cover at the bottom of the exterior assembly to reveal the keyhole.
- Unlock: Insert one of the provided physical keys and turn to unlock the deadbolt.
7. Maintenance
7.1 Battery Management
The Dhiedas MD121 features a built-in 10000mAh rechargeable Lithium-ion battery, offering up to 365 days of standby time.
- Charging: When the battery level is low, remove the battery pack from the interior assembly and charge it using a standard USB-C cable.
- Emergency Power: If the battery dies completely, you can temporarily power the lock using a portable power bank connected to the USB-C port on the exterior assembly.
Figure 8: Long-lasting rechargeable battery and emergency charging options.
7.2 General Care
- Clean the lock's exterior with a soft, damp cloth. Avoid abrasive cleaners or solvents.
- Keep the fingerprint sensor and camera lens clean for optimal performance.
- Ensure the door closes smoothly and the deadbolt extends fully without obstruction.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lock not responding | Low battery; electronic malfunction. | Charge the battery or use the emergency USB-C port with a power bank. Use physical key. |
| Fingerprint not recognized | Dirty sensor; improperly enrolled fingerprint; finger not placed correctly. | Clean the sensor. Re-enroll fingerprint. Ensure full contact with the sensor. |
| App connectivity issues | Weak WiFi signal; incorrect network (not 2.4GHz); app not updated. | Check WiFi signal strength. Ensure router is 2.4GHz. Update Tuya app. Re-pair device if necessary. |
| Doorbell not ringing on phone | App notifications disabled; poor internet connection. | Enable notifications for Tuya app. Check internet connection. |
| Auto-lock not working | Auto-lock feature disabled in app; incorrect delay setting. | Enable and configure auto-lock settings in the Tuya app. |
9. Specifications
| Feature | Detail |
|---|---|
| Brand | Dhiedas |
| Model Name | MD121 |
| Lock Type | Biometric, Combination Lock, Deadbolt, Keypad |
| Material | Zinc |
| Color | Gray |
| Dimensions (L x W x H) | 9.25 x 3.74 x 7 inches |
| Item Weight | 3.59 pounds |
| Connectivity Protocol | Bluetooth, Wi-Fi (2.4GHz) |
| Controller Type | Amazon Alexa, Android, iOS (Tuya App) |
| Battery | 10000mAh Rechargeable Lithium-ion (included) |
| Special Features | Built-in WIFI, HD camera, 2-way Audio, Stay Detection, Anti-Peeping Password, Auto-Lock, One-Touch Lock |
10. Warranty and Support
The Dhiedas MD121 Smart Door Lock comes with a 2-year trusted aftercare warranty. For technical support, troubleshooting assistance, or warranty claims, please contact Dhiedas customer service through the contact information provided with your purchase or visit the official Dhiedas website.
