Voice controlled Home automation using Arduino and Bluetooth

This dual-Arduino smart home system coordinates various microcontrollers, sensors, and actuators to automate domestic tasks and security. At the core, two Arduino Uno boards manage different segments of the network. The HC-05 Bluetooth module receives wireless serial commands sent from a smartphone running an application built via MIT App Inventor, allowing users to send voice commands that translate into device operations. For physical security and access control, the MFRC522 RFID Reader scans tags to trigger servo motors that actuate electronic locks or gates. Environmental safety is monitored continuously through multiple inputs: the DHT11 sensor tracks ambient temperature and humidity, an LDR measures light levels to switch LEDs, and specialized modules like the flame sensor, IR sensor, and rain sensor detect hazards such as fire, intrusion, or precipitation. When environmental triggers occur or remote commands are received, the system utilizes an L298N Motor Driver to manage directional DC motor movements and a relay module to safely switch higher-voltage AC or DC electrical loads like household appliances. Through this coordinated network of sensors and actuators, the dual-Arduino setup processes inputs locally, communicates wirelessly, and responds with precise mechanical and electrical actuation.