Published July 5, 2025 © GPL3+

Arduino-Based Vibration Alert System

Build an Arduino-based Vibration Alert System that sends real-time notifications to your Android phone via Bluetooth!

IntermediateProtip2 hours63

Things used in this project

Hardware components

Arduino UNO

HC-05 Bluetooth Module

Seeed Studio Grove - Vibration Sensor (SW-420)

Battery Contact, PP3 (9V)

USB-A to Micro-USB Cable

Jumper wires (generic)

Software apps and online services

Proteus

MIT App Inventor 2

Arduino IDE

Story

In this project tutorial, we will show you how to build a Vibration Detection and Alert System using an Arduino Uno, a vibration sensor (SW-420), the HC-05 Bluetooth module, and an Android App created using MIT App Inventor. This system detects vibrations and sends a real-time notification to your smartphone via Bluetooth.

This project shows how to build a real-time Vibration Detection & Alert System using an Arduino Uno, a SW-420 vibration sensor, and the HC-05 Bluetooth module. It sends instant alerts to your Android phone using an app made in MIT App Inventor.

The system is perfect for home security, earthquake alerts, tamper detection, and other IoT applications where motion or vibration needs to be detected and reported immediately.

This is an ideal project for engineering students, DIY electronics enthusiasts, and anyone interested in IoT (Internet of Things).

Project Overview

What You Will Learn:

How to simulate the vibration sensor circuit in Proteus
How to write Arduino code to detect vibration
How to connect HC-05 Bluetooth module to Arduino
How to build an Android app using MIT App Inventor
How to get real-time phone notifications for vibration

Components Used:

Arduino Uno
Vibration Sensor Module (SW-420)
HC-05 Bluetooth Module
Android Phone – Use any Android device
9V Battery
USB Cable for Arduino
Jumper Wires (Male-to-Male / Male-to-Female)
MIT App Inventor (Free Tool) – https://appinventor.mit.edu

Circuit Diagram & Proteus Simulation

You can first simulate the circuit using Proteus to test how the vibration sensor will behave. Connect the SW-420 vibration sensor to the Arduino’s digital pin and connect the HC-05 module to the TX/RX pins.

Once simulated successfully, replicate the same on actual hardware.

Arduino Code

The Arduino code continuously checks the vibration sensor status. When vibration is detected, it sends the message "Vibration Detected" to the serial port (and HC-05), which is then picked up by the Android App.

Android App using MIT App Inventor

Using MIT App Inventor, you can create a simple app that:

Connects to the HC-05 Bluetooth module
Listens for incoming messages from Arduino
Shows a pop-up alert when "Vibration Detected" is received

The.aab file and APK can be downloaded from the link below.

Applications of This Project

Home Security Systems
Tamper Detection in Machinery
Earthquake Detection Systems
Smart Lab Equipment Safety
Locker/door movement detection

Video Tutorial

Watch the full video tutorial with all steps covered including:

Proteus simulation
Real hardware setup
MIT App Inventor tutorial
Final testing and result

Watch Now on YouTube:

https://youtu.be/oI1oVC7OzYw

Code

Vibration Detection System using Arduino

#include <SoftwareSerial.h>

// Create SoftwareSerial on pins 10 (RX), 11 (TX)
SoftwareSerial bluetooth(10, 11);  // RX, TX

const int vibrationPin = 2;  // Vibration sensor connected to D2
const int buzzerPin = 8;     // Buzzer connected to D8

bool vibrationDetected = false;  // To track state

void setup() {
  pinMode(vibrationPin, INPUT);
  pinMode(buzzerPin, OUTPUT);

  Serial.begin(9600);        // Serial Monitor
  bluetooth.begin(9600);     // HC-05 Bluetooth module


}

void loop() {
  int sensorValue = digitalRead(vibrationPin);

  if (sensorValue == HIGH && !vibrationDetected) {
    vibrationDetected = true;
    digitalWrite(buzzerPin, HIGH);
    Serial.println("Vibration Detected");
    bluetooth.print("Vibration Detected\n");
    delay(500);
    digitalWrite(buzzerPin, LOW);
    delay(500);
  } else if (sensorValue == LOW) {
    vibrationDetected = false;  // Reset state when no vibration
  }

  delay(200);  // Small delay for stability
}

Credits

sumanskd

4 projects • 9 followers

Arduino-Based Vibration Alert System

Things used in this project

Hardware components

Software apps and online services

Story

Project Overview

Components Used:

Circuit Diagram & Proteus Simulation

Arduino Code

Android App using MIT App Inventor

Applications of This Project

Video Tutorial

Schematics

Vibration Detection System using Arduino, HC-05 & MIT App | Proteus + Real Hardware | Step-by-Step D

Code

Vibration Detection System using Arduino

Credits

sumanskd

Comments

Embed the widget on your own site

Arduino-Based Vibration Alert System

Arduino-Based Vibration Alert System

Things used in this project

Hardware components

Software apps and online services

Story

Project Overview

Components Used:

Circuit Diagram & Proteus Simulation

Arduino Code

Android App using MIT App Inventor

Applications of This Project

Video Tutorial

Schematics

Vibration Detection System using Arduino, HC-05 & MIT App | Proteus + Real Hardware | Step-by-Step D

Code

Vibration Detection System using Arduino

Credits

sumanskd

Comments

Related channels and tags