Implementation of a Smart Fan with Multiple Control Modes

This paper presents the implementation of a smart fan system with multiple control modes, which includes the following features: integrating embedded systems, wireless communication, and sensor-based automation. The smart fan supports automatic temperature-based, mobile app, and voice command operations. The system ESP32 microcontroller coordinates sensors, a fourphase relay module, a servo motor for oscillation, and power management circuits. A mobile application, developed with MIT App Inventor enables Bluetooth-based interaction, while Google Speech-to-Text via Wi-Fi provides voice control to operate the fan. Testing confirmed reliable performance, including <300 ms response time, stable Bluetooth operation up to 10 m, and 18% improvement in energy efficiency over conventional fans. This work demonstrates the potential of IoT-based appliances in promoting energy efficiency, accessibility, and intelligent living.