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.
- NodeMCU v1.0
- HC-SR04 Ultrasonic Sensor
- LED
- Buzzer
- Breadboard
- Jumper wires
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.
-
Hardware Setup
- Connect the components as shown in the circuit diagram.
- Ensure that all connections are secure and correct.
-
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.inofile in the Arduino IDE. - Select the correct board and port from the Tools menu.
- Upload the code to the NodeMCU.
- 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.
- 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.
If you'd like to contribute to this project, please fork the repository and use a feature branch. Pull requests are welcome.
This project is licensed under the MIT License - see the LICENSE file for details.