Design and Implementation of a Google Assistant Home Automation System

This project explores the integration of Arduino, NodeMCU, and relays to create a smart home automation system controlled by voice commands via Google Assistant and Home Assistant. The system is designed to operate three different appliances individually: a bulb, a CPU fan, and a pump. The voice commands are transmitted via the internet to a NodeMCU, which processes the commands and communicates with an Arduino to trigger the corresponding relays, ultimately controlling the appliances. The core of this system lies in the use of voice commands as the user interface. Google Assistant serves as the voice recognition platform, enabling users to control their home appliances effortlessly(since it is a prototype only one load will able to control using voice command remaining loads will be controlled using buttons). When a user issues a voice command, it is sent to the internet, where it reaches the NodeMCU. The NodeMCU, equipped with Wi-Fi connectivity, receives the command and processes it for further action. This process ensures that users can control their appliances from virtually anywhere, making the system both versatile and convenient.

The NodeMCU plays a pivotal role as the bridge between the voice command and the hardware. Upon receiving the command, the NodeMCU triggers the Arduino, which is responsible for managing the relays. Each relay corresponds to a specific appliance, allowing for individual control. For example, if a user says, "Turn on the bulb," the NodeMCU will interpret this command and activate the relssay connected to the bulb, illuminating the room. Similarly, commands like "Start the CPU fan" or "Activate the pump" will trigger the corresponding relays, enabling users to regulate their devices effortlessly.

Keywords: Arduin, NodeMCU, Google Assistant, Relay, Pump, CPU fan.