Home Security Bot

This project is a smart home security system built using a NodeMCU, an ultrasonic sensor (HC-SR04), an LED, and a buzzer. The system detects motion and alerts by lighting up the LED, sounding the buzzer, and sending notifications to Telegram.

Components

• NodeMCU v1.0
• HC-SR04 Ultrasonic Sensor
• LED
• Buzzer
• Breadboard
• Jumper wires

Circuit Diagram and Demonstration

How It Works

The HC-SR04 ultrasonic sensor measures the distance to an object. If an object comes within a certain distance, the NodeMCU triggers the LED and buzzer to alert the presence of an object or person, and sends a notification to a predefined Telegram channel.

Setup Instructions

1. Hardware Setup

   • Connect the components as shown in the circuit diagram.
   • Ensure that all connections are secure and correct.

2. Software Setup

   • Install the Arduino IDE from here.
   • Install the NodeMCU board in the Arduino IDE. Follow the instructions here.
   • Connect the NodeMCU to your computer using a USB cable.
   • Open the homesecuritybot.ino file in the Arduino IDE.
   • Select the correct board and port from the Tools menu.
   • Upload the code to the NodeMCU.

Usage

• Power the NodeMCU with a USB cable or a 5V power source.
• The ultrasonic sensor will continuously measure the distance.
• If an object is detected within the specified range, the LED will light up, the buzzer will sound, and a notification will be sent to Telegram.

Troubleshooting

• Ensure that the connections are secure and match the circuit diagram.
• Check that the NodeMCU is correctly connected to the computer and that the correct port is selected in the Arduino IDE.
• Make sure the ultrasonic sensor is functioning correctly.

Contributing

If you'd like to contribute to this project, please fork the repository and use a feature branch. Pull requests are welcome.

License

This project is licensed under the MIT License - see the LICENSE file for details.