Lazzy - Smart Plug

1. Introduction

The Lazzy Smart Plug is a user-friendly device that allows remote control of appliances via the "Lazzy" smartphone app using Wi-Fi and Bluetooth connectivity.

2. Objectives

• Design a smart plug with an ESP32 microcontroller.
• Develop the Lazzy app for Bluetooth and Wi-Fi control.
• Enable remote control and scheduling of appliances.
• Ensure security for worldwide access.

3. Components Required

• ESP32 Microcontroller
• 5V Relay Module
• 220V AC to 5V DC Power Supply
• RGB LED
• Pushbutton
• Wires
• AC Plug and Enclosure
• Smartphone for App Control

4. Working Principle

• Bluetooth Control: Users connect their smartphones to the plug via Bluetooth using the Lazzy app to control it with ON/OFF commands and set timers.
• Wi-Fi Connectivity: For remote access, the plug connects to the user’s home Wi-Fi, using MQTT (Message Queuing Telemetry Transport) for data communication.
• Timer Functionality: The app allows users to set timers for automated control of the plug.
• Pushbutton Control: The physical pushbutton offers manual control; a long press puts it in configuration mode.

5. Implementation

• Assemble the circuit as per the diagram.
• Program the ESP32 for Bluetooth, Wi-Fi, relay control, and user interaction.
• Develop the Lazzy app using a tool like MIT App Inventor.
• Pair the smartphone with the Lazzy Smart Plug via Bluetooth for control.
• Configure Wi-Fi by entering the SSID, password, and credentials.
• Test remote control and timer features.
• Verify that the pushbutton enables manual control and configuration.
• Ensure security measures are in place for worldwide control.

6. Results and Observations

The Lazzy Smart Plug successfully allows users to control appliances via Bluetooth and Wi-Fi. The timer function adds convenience, and worldwide control enhances its utility.

7. Conclusion

The Lazzy Smart Plug project demonstrates the integration of an ESP32 microcontroller with Bluetooth, Wi-Fi, and a dedicated smartphone app to create a versatile and secure smart plug. It offers a convenient and energy-efficient solution for remote control and automation.

8. Future Improvements

• Voice control integration with Amazon Alexa or Google Assistant.
• Energy consumption monitoring and reporting.
• Integration with smart home ecosystems (e.g., Apple HomeKit).
• Enhanced security features, like two-factor authentication.
• Compatibility with a wider range of appliances and socket types.