The Fusion Chime Smart Doorbell System  is an ESP32-based, fully open-source, battery-free, and extra cabling-free solution designed to seamlessly integrate into existing home doorbell setups. Its open-source hardware and software allow users to modify, expand, and integrate the system according to their needs, while offering advanced customization, security, and smart home connectivity.  Additionally, the entire system can be integrated into home automation platforms such as Home Assistant and ESPHome, enabling seamless smart home control and automation.

Fusion Chime Smart Doorbell Components and Features;

• Outdoor Unit – Doorbell Button 
• Indoor Unit – Chime
• Indoor Unit – Display Panel

Outdoor Unit (Waterproof)– Doorbell Button.

Features a 2.4” customizable display that can show text messages, images, or notifications sent via the Web interface.

Equipped with a PIR motion sensor that triggers image capture and audio recording when movement is detected.

ESP32-CAM module enables real-time video streaming to the indoor unit.

Microphone and speaker allow two-way audio communication between the visitor and the indoor unit.

Weather-resistant design, ensuring durability against outdoor conditions.

Temperature sensor provides real-time outdoor temperature monitoring, displayed on the indoor panel.

The button press event can be sent to the indoor units via wired connection, 433 MHz transmitter, or Wi-Fi, allowing the indoor unit to be placed anywhere as desired.  

Wi-Fi-enabled, allowing seamless communication with the indoor panel over Wi-fi.

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Indoor Chime unit

Customizable chime sounds, allowing users to upload and set different ringtones for various occasions while adjusting the loudness via the Web interface.

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Indoor Display Panel

4” Touch Screen  for intuitive control and interaction.

Built-in chime functionality allowing the indoor unit to play doorbell sounds and receive doorbell button press data via 433 MHz receiver or Wi-Fi

Smart home integration via the 433 MHz transmitter, enabling control of automated door locks or other home device automations

Real-time audio and video intercom for seamless communication with visitors.

Web interface control to configure system settings and manage notifications.

Multiple home automation integrations, supporting remote door unlocking, lighting control, and more.

Indoor and outdoor temperature monitoring.  

Multi-functional display with options for weather updates, time display, and a digital photo frame mode when idle.

Supports multiple doorbells, allowing different ringtone assignments based on the doorbell location (e.g., front door, back door, garden gate). This enables users to easily identify which doorbell was pressed.

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Special thanks to PCB Way for sponsoring my project. They did a great job - quick, clean, and efficient!