Introduction
The eufy Security Smart Lock C34 offers advanced keyless entry and seamless integration with your smart home ecosystem. Designed for convenience and security, this deadbolt supports multiple access methods and smart home platforms like Apple Home, Google Home, Alexa, and SmartThings, without requiring an additional hub. This manual provides detailed instructions for installation, operation, maintenance, and troubleshooting to ensure optimal performance of your smart lock.
Setup and Installation
The eufy Smart Lock C34 is designed for easy, 15-minute DIY installation without the need for drilling, compatible with standard doors in the US and Canada.
1. Prepare the Door
Ensure your door meets the following specifications for proper installation:
- Door Thickness: 1 3/8" - 2 1/8" (35mm - 55mm)
- Cross Bore Diameter: 1 1/2" / 2 1/8" (38mm / 54mm)
- Backset Distance: 2 3/8" / 2 3/4" (60mm / 70mm)
- Minimum Distance: 1 3/4" (45mm)
Image: Diagram illustrating the required door dimensions for installing the eufy Smart Lock C34, including door thickness, cross bore diameter, backset distance, and minimum distance.
2. Install the Deadbolt
Measure the backset distance from the center of the hole to the edge of the door. Adjust the latch to 60mm or 70mm as needed by twisting it clockwise 180 degrees to extend the length. Insert the deadbolt into the door, ensuring the word "TOP" is oriented upwards and the T-shaped hub is centered. Secure the deadbolt with screws.
3. Install the Exterior Keypad
If your door's hole diameter is 54mm, install the keypad directly. If it's 38mm, remove the spacer from the keypad. Make sure the cable goes underneath the deadbolt. Align the exterior keypad with the deadbolt and feed the cable through the door hole.
4. Install the Interior Assembly
Run the cable through the rectangular slot on the mounting plate. Align the mounting bracket with the threaded screw receptacles of the exterior keypad. Use your fingers to position the screws and screw them in a few turns, then use a screwdriver to finish screwing them in and secure the bracket firmly to your door. Plug the cable of the exterior keypad into the socket in the rear of the interior assembly. Route the cable around the tailpiece receiver to avoid pinching during installation. Align the T-shaped tailpiece with the T-shaped tailpiece receiver. Make sure the deadbolt is retracted and the thumb turn is in the unlocked position, then push the interior assembly into place. Check that the deadbolt functions properly by turning the thumb turn. Lock and unlock the deadbolt a few times to ensure it operates smoothly. Ensure the depth of the strike hole in the door frame is at least 1" (25.4mm), otherwise calibration may fail during setup, and the lock may not function as expected. Insert and tighten a screw into the hole below the thumb turn of the interior assembly, then insert and tighten two screws into the two holes directly below the battery compartment.
5. Insert Batteries and Setup via App
To insert the batteries: Insert the inner layer of batteries from bottom to top. Insert the outer layer of batteries from bottom to top. Open the eufy Security app on your phone and scan your lock's QR code, then follow the instructions to set up the lock. Once setup is complete, reinstall the battery cover. Your lock is now ready to use.
Video: A detailed guide on installing the eufy Smart Lock C34, covering door preparation, deadbolt installation, exterior keypad setup, interior assembly, and battery insertion. This video is provided by the seller, EufyHome.
6. Install the Strike Plate (Optional)
If you would like to, you may install the provided strike plate over the strike hole in the door frame. Secure it with screws. Your lock is now ready to use.
Operating Instructions
The eufy Smart Lock C34 offers multiple convenient ways to unlock and lock your door.
Access Methods:
- App Control: Unlock or lock your door remotely via the eufy Security app on your smartphone.
- Keypad: Enter your personalized access code on the large-print keypad.
- Physical Key: Use the traditional physical key as a backup.
- Voice Commands: Integrate with Amazon Alexa or Google Assistant to unlock/lock using voice commands.
- Fingerprint: (If applicable to your model variant) Use your registered fingerprint for quick access.
Image: Visual representation of the various unlocking methods available for the eufy Smart Lock C34, including app control, voice control, physical key, and large-print keypad.
Remote Control and Smart Home Integration:
The eufy Smart Lock C34 seamlessly integrates with Apple Home, Google Home, Alexa, and SmartThings. Control your lock remotely through these apps or hubs like Apple HomePod. Enjoy features like simple setup, access management, real-time notifications, event logs, and remote unlocking. No additional hub is required for basic integration.
Image: A smartphone displaying the eufy Security app interface for remote control of the smart lock, showing battery level, room assignment, access management, and automation options.
Matter Connection Benefits:
Matter provides a faster, safer, and more stable experience compared to traditional Wi-Fi connections. It offers multi-system integration, convenient connectivity, enhanced data security and privacy, and improved response time with lower latency.
Access Management:
Create up to 100 customized codes for family, friends, or service providers using the eufy Security App. You can set temporary or scheduled access for specific periods, enhancing security and convenience.
Auto-Lock Feature:
Enable the auto-lock feature to automatically secure your home after a set period (e.g., 5 seconds to 60 minutes) once the door is closed. This ensures your door is always locked, even if you forget.
Video: A demonstration of the auto-lock feature of the eufy Smart Lock, showing how the deadbolt automatically extends after the door is closed.
Maintenance
Battery Life and Replacement:
The eufy Smart Lock C34 is powered by 8 AA batteries, providing up to 8 months of battery life based on typical usage (approximately 10 unlocks per day). You will receive low battery alerts at 20% charge, with power lasting up to one more month. To replace batteries, remove the battery cover, then remove the outer layer of batteries from top to bottom. Pull the ribbon to remove the inner layer of batteries from bottom to top. Insert new batteries from bottom to top, inner layer first, then outer layer.
Image: Graphic illustrating the long battery life of the eufy Smart Lock C34, showing up to 8 months of power compared to other smart locks.
Emergency Power:
In case the batteries die completely, you can use a portable charger to unlock your Smart Lock via the hack-proof emergency power port located at the bottom of the exterior keypad. This port is for emergency power supply only and does not allow data transfer.
Cleaning:
Wipe the exterior and interior components of the lock with a soft, dry cloth. Avoid using abrasive cleaners or solvents that could damage the finish.
Troubleshooting
Calibration Issues:
If the lock is not functioning as expected after installation, ensure the strike hole in the door frame is at least 1" (25.4mm) deep. Incorrect depth can lead to calibration failure. You can recalibrate the lock via the eufy Security app.
Door Alignment:
The lock's performance can be sensitive to door alignment and friction in the latch/strike area. If the door is not pulled tight or aligned perfectly, the bolt may not retract or extend properly. Ensure your door is properly aligned for smooth operation.
Wrong-Try Protection:
The lock features wrong-try protection. If an incorrect passcode or fingerprint is entered too many times consecutively, the lock will temporarily enter a lockdown period to prevent unauthorized access.
Connectivity Issues:
If experiencing issues with app control or smart home integration, ensure your Wi-Fi network is stable and the lock is within range. For Matter connectivity, ensure you have a compatible Matter hub (e.g., Apple HomePod, Google Nest Hub, Amazon Echo devices).
Specifications
| Feature | Detail |
|---|---|
| Brand | eufy Security |
| Model Number | T85D2 |
| Lock Type | Deadbolt |
| Material | Steel or brass alloy |
| Item Dimensions L x W x H | 6.89 x 2.76 x 1.3 inches |
| Item Weight | 1.33 Kilograms |
| Connectivity Protocol | Wi-Fi, Matter |
| Control Method | App, Remote, Voice, Keypad, Physical Key |
| Controller Type | Apple Home, Google Assistant, Amazon Alexa, SmartThings |
| Power Source | 8 AA batteries |
| Special Feature | Auto-Lock |
Warranty
The eufy Security Smart Lock C34 comes with 18 months of electronic protection and 36 months of mechanical coverage from the date of purchase. Please retain your proof of purchase for warranty claims.
Customer Support
For any questions, technical assistance, or warranty claims, please contact eufy Security customer support. Our professional 24/7 customer service team is available to assist you.