This project presents a smart and efficient Voice-Based Home Automation System using an ESP32 microcontroller with Bluetooth and remote-control capabilities. The system is designed to provide both manual and automatic control of household appliances, enhancing convenience, energy efficiency, and security. In manual mode, the user can control devices such as bulbs, fans, and sockets using a mobile application (Blynk) and Bluetooth-based voice commands. This allows easy and flexible operation without physical interaction. The ESP32 processes commands received from the user and activates corresponding relays to control the connected appliances. In automatic mode, the system operates based on real-time sensor inputs. A PIR (Passive Infrared) sensor detects human presence, while an LDR (Light Dependent Resistor) monitors ambient light intensity. Based on these inputs, the system automatically controls lighting and socket operation. Additionally, the system uses temperature and motion sensing to automatically adjust the fan and socket, improving comfort and reducing power consumption. For enhanced security, when the PIR sensor detects human presence in manual mode, the system sends an alert email to the house owner, enabling remote monitoring and quick response. Overall, this system integrates IoT, wireless communication, and sensor-based automation to create a smart home solution that improves safety, reduces power consumption, and provides user-friendly control.      

Objectives:

 To control home appliances using ESP32.

 To operate devices using Bluetooth voice commands and the Blynk app in manual mode.

 To develop automatic control using PIR sensor, LDR, and temperature sensor.

 To switch bulb, fan, and socket automatically based on conditions.

 To send email alerts when motion is detected.

 To reduce power consumption and improve convenience.

 To provide a simple and user-friendly smart home system.        

The major building blocks of this project are:

• Regulated Power supply.
• ESP32 Module.
• Temperature sensor.
• PIR sensor.
• LDR sensor.
• Relays.
• Bulb
• DC fan.
• Three pin sockets.
• Auto/Manual mode.
• Bluetooth.

     

Software’s used:

• ARDUINO IDE.
• Embedded C language.
• WEB and Bluetooth Technology.

         

Block Diagram:                  

video: