Control Multiple AC Appliances Wirelessly with Web Interface

This smart home automation project centers around the IndusBoard Coin, an ESP32-S2 microcontroller board equipped with built-in Wi-Fi capabilities. To allow interaction without external cloud dependencies, the ESP32-S2 hosts a lightweight embedded web server directly on its local network. When a user connects to this server via a smartphone or computer web browser, they can access a graphical user interface featuring interactive buttons and controls. Interacting with the interface sends HTTP requests back to the microcontroller. The IndusBoard Coin processes these incoming network commands and alters its general-purpose digital output pins accordingly. These low-voltage output signals are used to drive external hardware: a 5V DC adapter powers the active logic, a 1-channel relay module acts as an electronic switch to open or close the high-voltage circuit for standard AC appliances like lights, and a specialized 250V AC fan speed controller module receives control inputs to adjust motor speeds. By translating Wi-Fi packets into physical switching actions and control signals, the system bridges the gap between modern wireless devices and traditional high-voltage electrical infrastructure safely and locally.