Smart Home Automation System with IoT and Voice Control

This device integrates multiple smart features, allowing users to monitor and control their home environment remotely via the Blynk app or voice assistants (Siri & Google Assistant).

Key Features:

1. Environmental Monitoring: Tracks room temperature and humidity, comparing them with city data using the OpenWeatherMap API.

2. Smart Appliance Control: Manages AC appliances such as room lights.

3. Door Automation: Enables remote main door access.

4. RGB LED Control: Adjusts LED RGB lighting for ambiance customization.

Hardware Components:

1. Power Supply System

• 24W power supply providing 12V output.

• Integrated TP4056 module for safe battery charging and discharge.

• Battery backup added to stabilize power delivery, preventing the ESP8266 from resetting when the 12V, 3A door motor operates on a 12V, 2A power supply.

2. Circuit Board

• DC-DC Step-down Converter: Converts 12V to 5V using an LM7815 voltage regulator with capacitors.

• Transistors (H13003DL): Controls 12V RGB LED lighting.

• Battery integration ensures stable power delivery.

3. Microcontroller & Relays

• Geekcreit® ESP8266 IoT Development Board as the brain of the system.

• DHT11 sensor for temperature and humidity measurement.

• OLED display for real-time data visualization.

• Two relays to control high-current AC & DC appliances.

Software Components:

1. Arduino Code: Handles sensor data, automation logic, and device control.

2. Blynk Web & Mobile Interface: Provides remote monitoring and control.

3. IFTTT Integration: Enables voice commands through Siri & Google Assistant.

This project enhances home automation with real-time monitoring, smart control, and voice-enabled convenience, making it a practical and efficient IoT solution.