Hybrid Smart Home Assistant with Offline Voice Control and Manual Operation via Node-RED Dashboard

In this project, we have built a smart home automation system that allows you to control electrical appliances using both voice commands (offline) and a web-based dashboard (Node-RED). The system uses: VC02 Voice Recognition Module → To recognize voice commands offline NodeMCU (ESP8266) → To process commands and control relays MQTT Protocol → To communicate between NodeMCU and Raspberry Pi Raspberry Pi 3 Model B+ → Acts as an MQTT broker and runs Node-RED Four-Channel Relay Module (with Optocoupler) → Controls electrical appliances Node-RED Dashboard → Provides a web interface for manual control