How to Wire Aqara Doorbell to Existing Doorbell Easily

Wiring your Aqara Doorbell to an existing doorbell is a simple, DIY-friendly upgrade that requires matching the Aqara’s power needs (8–24V AC) to your current transformer. Turn off power, connect the Aqara’s wires to your existing doorbell terminals, and secure the setup—no extra hub needed for most models. Ensure compatibility first, and enjoy smart alerts without rewiring your home.

Key Takeaways

• Check compatibility: Ensure your Aqara doorbell works with existing wiring voltage.
• Turn off power: Always disconnect electricity before wiring to avoid shocks.
• Use existing wires: Connect Aqara terminals to old doorbell wires directly.
• Secure connections: Tighten screws and test wiring stability for reliable performance.
• Test functionality: Power on and verify chime/doorbell app response post-installation.
• Weatherproof outdoor units: Seal connections if installing in exposed areas.

Why Upgrade to an Aqara Doorbell?

Imagine never missing a delivery, greeting visitors remotely from your phone, or enhancing your home security with real-time video—all from a sleek, modern doorbell. The Aqara Doorbell is more than just a chime; it’s a smart home integration hub that brings convenience, safety, and automation to your front door. Unlike traditional doorbells that simply ring when pressed, Aqara’s offering includes HD video, two-way audio, motion detection, night vision, and seamless integration with Apple HomeKit, Alexa, and Google Assistant. Whether you’re at work, on vacation, or just relaxing in your living room, your doorbell becomes a remote-controlled security camera and communication tool.

One of the best parts? You don’t need to run new wires or overhaul your entire entry system. Most homes already have a working doorbell circuit, and the Aqara Doorbell is designed to work with existing doorbell wiring. This makes the installation process far simpler than you might expect—especially if you’re upgrading from a mechanical or digital chime. With a few tools, some basic electrical knowledge, and a step-by-step approach, you can wire your Aqara Doorbell to your existing setup in under an hour. This guide walks you through every stage, from assessing compatibility to final configuration, ensuring a smooth, safe, and successful installation.

Understanding Your Existing Doorbell System

Before you unbox your Aqara Doorbell, it’s crucial to understand how your current doorbell system works. Most traditional doorbells use a low-voltage circuit (typically 8V to 24V AC) to power the button and activate the chime. This system consists of three main components: the doorbell button, the transformer, and the chime unit. The transformer steps down your home’s 120V AC power to the lower voltage required by the doorbell system, which then runs through the button and chime via insulated wires.

Components of a Traditional Doorbell System

• Doorbell Button: Installed outside your door, it completes the circuit when pressed, sending power to the chime.
• Transformer: Usually located near your electrical panel, furnace, or attic, it converts 120V AC to 8–24V AC.
• Chime Unit: Located indoors (often in a hallway), it produces the familiar “ding-dong” sound.
• Wiring: Two low-voltage wires connect the button to the transformer and chime.

To ensure compatibility with your Aqara Doorbell, you need to verify the voltage of your existing system. Most Aqara models (like the Aqara Video Doorbell G2H Pro or G3) are designed to work with 8–24V AC systems. If your system uses DC voltage or falls outside this range, you may need a voltage adapter or transformer replacement. Use a multimeter to test the voltage at the doorbell button terminals (with the button disconnected) to confirm compatibility.

Identifying Your Chime Type

Another key factor is the type of chime unit you have:

• Mechanical Chime: Uses electromagnets and physical hammers to strike chime bars. These are common in older homes.
• Digital/Plug-In Chime: Uses electronic sound modules and often plugs into a wall outlet or connects to low-voltage wires.
• Wireless Chime: Battery-powered and not connected to wiring. These may not be compatible with Aqara unless you bypass them.

For optimal performance, Aqara recommends using a mechanical or digital chime connected via low-voltage wires. If you have a wireless chime, you can either replace it with a wired unit or bypass it entirely and rely on the Aqara app for notifications. In most cases, keeping the wired chime allows for both local sound and smart notifications—ideal for households where not everyone uses a smartphone.

Tools and Materials You’ll Need

Wiring your Aqara Doorbell to an existing system doesn’t require a full electrical toolkit, but having the right tools ensures safety and precision. Here’s a comprehensive list of what you’ll need:

Essential Tools

• Multimeter: For measuring voltage at the doorbell button and transformer. A digital multimeter (around $20) is highly recommended.
• Screwdriver Set: Phillips #1 and #2, flathead, and a precision set for small terminals.
• Wire Strippers: For trimming and preparing low-voltage wires (18–22 gauge).
• Needle-Nose Pliers: Useful for bending wires and tightening small screws.
• Voltage Tester (Non-Contact): For confirming wires are de-energized before working.
• Drill and Drill Bits: If mounting the Aqara bracket to brick, stucco, or concrete.
• Level: To ensure your doorbell is perfectly aligned.
• Electrical Tape or Wire Nuts: For securing connections (though Aqara uses screw terminals).

Materials and Accessories

• Aqara Doorbell (e.g., G2H Pro or G3): Ensure you have the correct model for your region (US, EU, etc.).
• Mounting Bracket: Usually included with the doorbell.
• Low-Voltage Wires (if needed): 18-gauge stranded copper wire for extensions (if your existing wires are too short).
• Wall Anchors and Screws: For secure mounting on various surfaces.
• Optional: Power Booster (Transformer Upgrade): If your system is below 16V or has multiple devices drawing power.
• Optional: Aqara Chime (if replacing old unit): The Aqara Indoor Chime is Wi-Fi enabled and syncs with the doorbell.

Pro Tip: Before starting, take photos of your existing setup—especially the wiring at the button, transformer, and chime. This helps if you need to troubleshoot later or reinstall the old system.

Safety first: Always turn off power at the circuit breaker before working on any wiring. Even though doorbell systems use low voltage, the transformer is connected to high voltage. Confirm the circuit is off using a non-contact voltage tester on the transformer terminals.

Step-by-Step Wiring Installation

Now that you’ve assessed your system and gathered your tools, it’s time to install the Aqara Doorbell. Follow these steps carefully to ensure a reliable and safe connection.

Step 1: Turn Off Power and Disconnect Old Button

Locate your electrical panel and turn off the breaker that powers your doorbell circuit (often labeled “doorbell,” “chime,” or “front door”). Use your non-contact voltage tester to confirm the transformer is dead. Then, go outside and remove the existing doorbell button. Unscrew the mounting plate and carefully disconnect the two low-voltage wires (usually labeled “Front” and “Trans” or just two black wires). Wrap the exposed ends with electrical tape to prevent shorting.

Step 2: Prepare the Aqara Mounting Bracket

Hold the Aqara mounting bracket against the wall where you want to install the doorbell. Use a level to ensure it’s straight. Mark the screw holes with a pencil. If you’re mounting on wood, use the provided screws. For brick, stucco, or concrete, drill pilot holes and insert wall anchors. Secure the bracket firmly—this is critical, as the doorbell will be frequently removed and replaced for charging (if battery-powered) or cleaning.

Step 3: Connect the Wires to the Aqara Terminal

The Aqara Doorbell uses a screw-terminal block for wire connections. Unlike some models that require wire nuts, Aqara’s design allows direct insertion. Strip about 1/4 inch (6 mm) of insulation from each of the two existing wires. Insert one wire into the “+” terminal and the other into the “-” terminal. Tighten the screws securely. Note: Polarity does not matter for AC voltage, so don’t worry about which wire goes where.

If your existing wires are too short, splice in a 12–18 inch extension using wire nuts or a lever-nut connector. Run the new wire through the mounting bracket’s cable management slot to keep things tidy.

Step 4: Attach the Aqara Doorbell

Once the wires are connected, align the Aqara Doorbell with the mounting bracket. It typically slides in from the top or clicks into place magnetically. Secure it with the provided security screw (if included) to prevent theft. Ensure the doorbell is flush against the wall and the camera lens is unobstructed.

Step 5: Restore Power and Test the Connection

Go back to your electrical panel and turn the breaker back on. Wait about 30 seconds for the Aqara Doorbell to power up. You should see the LED indicator light up (usually blue or green). Press the doorbell button—the chime should sound, and the camera should activate.

If the chime doesn’t work, double-check the wiring at the transformer and chime unit. If the camera powers on but doesn’t connect to Wi-Fi, proceed to the app setup (next section).

Step 6: Optional—Replace or Bypass the Chime

If your existing chime is outdated or incompatible (e.g., wireless), consider installing the Aqara Indoor Chime. This Wi-Fi-enabled device plugs into any outlet and syncs with the doorbell. It can play custom sounds, adjust volume, and even trigger other smart home actions (e.g., turn on lights when the doorbell rings).

To bypass a wireless chime, simply disconnect its wires at the transformer or chime unit and cap them. Your Aqara Doorbell will then rely solely on app notifications and any Aqara Chime you’ve added.

Configuring the Aqara Doorbell via the App

With the hardware installed, it’s time to set up the smart features. The Aqara Doorbell connects to your home Wi-Fi and integrates with your smart home ecosystem using the Aqara Home app (or Apple Home app, if using HomeKit).

Download and Set Up the Aqara Home App

Download the Aqara Home app from the App Store (iOS) or Google Play (Android). Create an account or log in if you already have one. Tap “+” to add a new device and select “Doorbell” from the list. The app will guide you through the setup process.

Connect to Wi-Fi and Pair the Doorbell

When prompted, press and hold the reset button on the side of the Aqara Doorbell for 5 seconds until the LED flashes rapidly. This puts it in pairing mode. In the app, select your Wi-Fi network (2.4 GHz only—5 GHz is not supported) and enter your password. The app will communicate with the doorbell to connect it to your network. This may take 1–2 minutes.

Once connected, the app will detect the doorbell and allow you to name it (e.g., “Front Door”). You’ll also be prompted to set up motion detection zones, notification preferences, and recording options.

Customize Smart Features

• Motion Detection: Adjust sensitivity and draw zones to avoid false alerts from passing cars or trees.
• Night Vision: Choose between IR (black-and-white) and color night vision (if supported).
• Two-Way Audio: Test the microphone and speaker for clear communication.
• Smart Home Integration: Link to Alexa, Google Assistant, or Apple HomeKit. For example, say, “Alexa, show me the front door” on an Echo Show.
• Cloud or Local Storage: Aqara offers cloud subscriptions (e.g., 7-day event history), or you can store videos locally via microSD card (up to 512GB).

Pro Tip: Enable “Visitor Announcement” in the app to have your smart speaker announce when someone is at the door—even if they don’t press the button.

Data Table: Aqara Doorbell Compatibility and Specifications

Feature	Aqara G2H Pro	Aqara G3	Compatibility Notes
Power Input	8–24V AC	8–24V AC	Works with most existing doorbell circuits
Wi-Fi	2.4 GHz	2.4 GHz	5 GHz not supported; ensure strong signal at door
Video Resolution	1080p Full HD	1080p with 160° FOV	G3 has wider field of view and color night vision
Storage Options	microSD (up to 512GB) + Cloud	microSD + Cloud + HomeKit Secure Video	Cloud subscription required for extended history
Smart Home Platforms	Aqara, HomeKit, Alexa, Google	Aqara, HomeKit, Alexa, Google	HomeKit setup requires iOS device
Chime Compatibility	Wired mechanical/digital	Wired + Aqara Indoor Chime	Aqara Chime recommended for best experience
Weather Resistance	IP54 (splash-resistant)	IP54	Not fully waterproof; avoid direct rain exposure

This table highlights key differences between popular Aqara models and their compatibility with existing systems. The G3 offers enhanced features like facial recognition (when linked to Aqara HomeKit) and better night vision, making it ideal for tech-savvy users. However, the G2H Pro remains a solid, cost-effective choice for basic smart doorbell needs.

Conclusion: Enjoy a Smarter, Safer Entry

Wiring an Aqara Doorbell to your existing doorbell system is a straightforward upgrade that delivers significant benefits. By leveraging your home’s existing low-voltage wiring, you avoid the hassle and cost of running new cables. In under an hour, you can transform a simple chime into a powerful smart security tool with video, audio, motion alerts, and seamless smart home integration.

Throughout this guide, we’ve covered everything from assessing your current setup and gathering tools to wiring, testing, and configuring the app. Whether you have a mechanical chime in an older home or a digital unit in a modern build, the Aqara Doorbell adapts to your needs. And with options for local storage, cloud backup, and multi-platform support, it fits into any smart home ecosystem.

Remember: always prioritize safety by turning off the power before working on any electrical components. Double-check voltage compatibility, secure all connections, and test thoroughly. If you encounter issues, the Aqara community forums and customer support are excellent resources.

Once installed, your Aqara Doorbell will do more than just ring—it will notify you of visitors, let you see and speak to delivery drivers, deter potential intruders, and even integrate with your lights, locks, and alarms. It’s not just a doorbell; it’s your home’s first line of smart defense. So go ahead, wire it up, power it on, and step into the future of home entry.

Frequently Asked Questions

Can I wire the Aqara doorbell to my existing doorbell system?

Yes, the Aqara doorbell can be wired to most existing doorbell systems as long as they operate on low voltage (8-24V AC). It’s compatible with mechanical or digital chimes, but always check your current setup first.

How do I connect the Aqara doorbell to an existing doorbell transformer?

Turn off the power, disconnect the old doorbell wires, and connect them to the Aqara doorbell’s terminals. Ensure the transformer outputs 8-24V AC for safe operation. Restore power and test the connection.

Do I need a resistor when wiring the Aqara doorbell to an existing chime?

Only if your chime is digital or has a high power draw. The Aqara doorbell may require a parallel 8-10Ω resistor to prevent flickering or malfunction. Mechanical chimes usually don’t need one.

How to wire an Aqara doorbell without an existing doorbell?

If you lack wiring, use a plug-in transformer (16-24V AC) to power the Aqara doorbell. Alternatively, opt for the battery-powered version for a wireless setup. Both options are easy to install.

Why isn’t my Aqara doorbell working after wiring to the existing system?

Check for loose connections, incorrect voltage, or chime incompatibility. Ensure the wires are securely fastened and the transformer meets the 8-24V AC requirement. Reset the device if needed.

Can I use the Aqara doorbell with a smart home hub while wiring it?

Absolutely! The Aqara doorbell syncs with hubs like Home Assistant or Apple HomeKit via Zigbee. Wiring it to your existing doorbell doesn’t affect smart features like notifications or live view.