Vehicle Accident Alert System

Vehicle Accident Alert System Using Arduino

Prateek 15/12/2022

2 33,280 3 minutes read

Table of Contents

Introduction

In This, Article You Learn How To Interface with The ADXL-335 Sensor With Arduino And I will Show you how you Clabite The ADXL-335 sensor.

ADXL-335 An accelerometer is an electromechanical device that will measure acceleration forces in the form of The Analog Value And provide output In the Form Of X, Y, And Z directions. with the help of all directions, you create so many Projects.

Bill Of Materials

S.N	Component	Quantity	Buy To Link
1	Arduino Nano	1
2	ADXL-345	1
3	GSM SIM800l	1
4	GPS Neo-6m	1
5	LM2596 Step Conveter	1
6	Zero PCB	1

Sim800l GSM Module

SIM800l GSM Module, designed by Simcom. This module operates at a voltage of 3.4v to 4.4v, it is powered directly with a lithium-ion battery and LM2596 step-down converter.

The comes with an IPX antenna interface that allows switching between a PCB antenna and a suction cup antenna.

Note – The Module is compatible with any 2G-3G SIM card.

Led status indicator

The sim800l module has an LED indicator that shows the network conduction.

Blinking every 1 second – The module is powered on but not connected to the network.
Blinking every 2 seconds – The GPRS data connection is active and ready for data Transfer.
Blinking every 3 seconds – The Module is connected to a network and ready to send/receive SMS messages And Calls.

Neo-6M GPS Module

The Neo-6M GPS module is developed by U-blox.

The GPS Module in Full form is (the Global Positioning System) it uses 31 satellites orbiting Earth to transmit location and date/time.

Led indicator

on the neo-6M GPS Module Board, there’s is a small LED that shows the condition of communication status with satellite:

No, blinking means the GPS module is searching for satellites.
Blinking Every 1 Second Means the position is fixed and is connected to the satellite.

LM2596 StepDown Converter

ADXL-335 Sensor

This module can be used to sense motion (in the case of non-moving) in 3 axes. This is the latest in a long, proven line of Analog Sensors- the holy grail of accelerometers.

PIN

Operating Voltage :- 3.7 To 5v
Value :- Analog Value
Direction:- X-axis, Y-axis, And Z-axis

Features

ADXL335: 3-axis sensing.
Small, low-profile package.
Low power: 350 μA.
Single-supply operation: 1.8 V to 3.6 V.
Excellent temperature stability.
BW adjustment with a single capacitor per axis.
RoHS/WEEE is lead-free compliant.

More GPS Related Projects.

PCB Design

Front Side

Back Side

Block Diagram

Here I Show The Block Diagram In this Project, On the Input Side I connected to the ADXL-335 Sensor and on the Output Side, I connected To The GSM Sim800l And GPS Neo-6m Module.

If any Movement is detected The ADXL-335 Sensor Crosses the Threshold Value And GSM Send The Text Message.

Circuit Diagram

The ADXL-335 Sensor Is Connected To The Pin Number:

VCC 5v
GND GND
X-Axis A0
Y-Axis A1
Z-Axis A2

GSM SI800l Module Will be connected To The PIN Number:

VCC 3.7v
GND GND
Tx D2
Rx D3

GPS Neo-6M Module Will be connected To The Pin Number:

VCC 5v
GND GND
Tx D8
Rx D9

The Buzzer Will be connected To The Pin Number:

GND GND
DO D5

The Push Button Will be connected To The Pin Number:

GND GND
DO D6

In this circuit Diagram, I Used the LM2596 Stepdown Converter

Source Code/Program

Before You Uploading the Code You are Required To Add the Library first.

AltSoftSerial

TinyGPS++

Change the Mobile Number

const String EMERGENCY_PHONE = "+91xxxxxxxxxx";

1	const String EMERGENCY_PHONE = "+91xxxxxxxxxx";

//Prateek
//www.justdoelectronics.com

#include <AltSoftSerial.h>
#include <TinyGPS++.h>
#include<Wire.h>
#include <math.h>
#include <SoftwareSerial.h>

const String EMERGENCY_PHONE = "+91xxxxxxxxxx";
#define rxPin 2
#define txPin 3

SoftwareSerial sim800(rxPin, txPin);
AltSoftSerial neogps;
TinyGPSPlus gps;
//RX Pin To D9
//TX Pin To D8

String sms_status, sender_number, received_date, msg;
String latitude, longitude;
#define BUZZER 5
#define BUTTON 6
#define xPin A0
#define yPin A1
#define zPin A2

byte updateflag;

int xaxis = 0, yaxis = 0, zaxis = 0;
int deltx = 0, delty = 0, deltz = 0;
int vibration = 2;
int devibrate = 75;
int magnitude = 0;
int sensitivity = 20;

double angle;
boolean impact_detected = false;
unsigned long time1;
unsigned long impact_time;
unsigned long alert_delay = 30000;

void setup()
{

  Serial.begin(9600);
  sim800.begin(9600);
  neogps.begin(9600);
  pinMode(BUZZER, OUTPUT);
  pinMode(BUTTON, INPUT_PULLUP);

  sms_status = "";
  sender_number = "";
  received_date = "";
  msg = "";
  sim800.println("AT");
  delay(1000);
  sim800.println("ATE1");
  delay(1000);
  sim800.println("AT+CPIN?");
  delay(1000);
  sim800.println("AT+CMGF=1");
  delay(1000);
  sim800.println("AT+CNMI=1,1,0,0,0");
  delay(1000);
  time1 = micros();
  xaxis = analogRead(xPin);
  yaxis = analogRead(yPin);
  zaxis = analogRead(zPin);
}



void loop()
{
  if (micros() - time1 > 4999) Impact();
  if (updateflag > 0)
  {
    updateflag = 0;
    Serial.println("Impact detected!!");
    Serial.print("Magnitude:");
    Serial.println(magnitude);

    getGps();
    digitalWrite(BUZZER, HIGH);
    impact_detected = true;
    impact_time = millis();


  }
  if (impact_detected == true)
  {
    if (millis() - impact_time >= alert_delay) {
      digitalWrite(BUZZER, LOW);
      makeCall();
      delay(1000);
      sendAlert();
      impact_detected = false;
      impact_time = 0;
    }
  }

  if (digitalRead(BUTTON) == LOW) {
    delay(200);
    digitalWrite(BUZZER, LOW);
    impact_detected = false;
    impact_time = 0;
  }
  while (sim800.available()) {
    parseData(sim800.readString());
  }
  while (Serial.available())  {
    sim800.println(Serial.readString());
  }
}

void Impact()
{
  time1 = micros();
  int oldx = xaxis;
  int oldy = yaxis;
  int oldz = zaxis;

  xaxis = analogRead(xPin);
  yaxis = analogRead(yPin);
  zaxis = analogRead(zPin);


  vibration--;
  Serial.print("Vibration = ");
  Serial.println(vibration);
  if (vibration < 0) vibration = 0;
  if (vibration > 0) return;
  deltx = xaxis - oldx;
  delty = yaxis - oldy;
  deltz = zaxis - oldz;


  magnitude = sqrt(sq(deltx) + sq(delty) + sq(deltz));
  if (magnitude >= sensitivity) //impact detected
  {
    updateflag = 1;
    vibration = devibrate;
  }
  else
  {
    magnitude = 0;
  }
}


void parseData(String buff) {
  Serial.println(buff);

  unsigned int len, index;
  index = buff.indexOf("\r");
  buff.remove(0, index + 2);
  buff.trim();
  if (buff != "OK") {
    index = buff.indexOf(":");
    String cmd = buff.substring(0, index);
    cmd.trim();

    buff.remove(0, index + 2);
    if (cmd == "+CMTI") {
      index = buff.indexOf(",");
      String temp = buff.substring(index + 1, buff.length());
      temp = "AT+CMGR=" + temp + "\r";
      sim800.println(temp);
    }
    else if (cmd == "+CMGR") {
      if (buff.indexOf(EMERGENCY_PHONE) > 1) {
        buff.toLowerCase();
        if (buff.indexOf("get gps") > 1) {
          getGps();
          String sms_data;
          sms_data = "GPS Location Data\r";
          sms_data += "http://maps.google.com/maps?q=loc:";
          sms_data += latitude + "," + longitude;

          sendSms(sms_data);
        }
      }
    }
  }
  else {
  }
}

void getGps()
{
  // Can take up to 60 seconds
  boolean newData = false;
  for (unsigned long start = millis(); millis() - start < 2000;) {
    while (neogps.available()) {
      if (gps.encode(neogps.read())) {
        newData = true;
        break;
      }
    }
  }

  if (newData)
  {
    latitude = String(gps.location.lat(), 6);
    longitude = String(gps.location.lng(), 6);
    newData = false;
  }
  else {
    Serial.println("No GPS data is available");
    latitude = "";
    longitude = "";
  }

  Serial.print("Latitude= "); Serial.println(latitude);
  Serial.print("Lngitude= "); Serial.println(longitude);
}


void sendAlert()
{
  String sms_data;
  sms_data = "Accident Alert!!\r";
  sms_data += "http://maps.google.com/maps?q=loc:";
  sms_data += latitude + "," + longitude;

  sendSms(sms_data);
}

void makeCall()
{
  Serial.println("calling....");
  sim800.println("ATD" + EMERGENCY_PHONE + ";");
  delay(20000); //20 sec delay
  sim800.println("ATH");
  delay(1000); //1 sec delay
}

void sendSms(String text)
{
  //return;
  sim800.print("AT+CMGF=1\r");
  delay(1000);
  sim800.print("AT+CMGS=\"" + EMERGENCY_PHONE + "\"\r");
  delay(1000);
  sim800.print(text);
  delay(100);
  sim800.write(0x1A);
  delay(1000);
  Serial.println("SMS Sent Successfully.");
}


boolean SendAT(String at_command, String expected_answer, unsigned int timeout) {

  uint8_t x = 0;
  boolean answer = 0;
  String response;
  unsigned long previous;
  while ( sim800.available() > 0) sim800.read();

  sim800.println(at_command);

  x = 0;
  previous = millis();

  do {
    if (sim800.available() != 0) {
      response += sim800.read();
      x++;
      if (response.indexOf(expected_answer) > 0) {
        answer = 1;
        break;
      }
    }
  }
  while ((answer == 0) && ((millis() - previous) < timeout));
  Serial.println(response);
  return answer;
}

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//Prateek

//www.justdoelectronics.com

#include <AltSoftSerial.h>

#include <TinyGPS++.h>

#include<Wire.h>

#include <math.h>

#include <SoftwareSerial.h>

const String EMERGENCY_PHONE = "+91xxxxxxxxxx";

#define rxPin 2

#define txPin 3

SoftwareSerial sim800(rxPin, txPin);

AltSoftSerial neogps;

TinyGPSPlus gps;

//RX Pin To D9

//TX Pin To D8

String sms_status, sender_number, received_date, msg;

String latitude, longitude;

#define BUZZER 5

#define BUTTON 6

#define xPin A0

#define yPin A1

#define zPin A2

byte updateflag;

int xaxis = 0, yaxis = 0, zaxis = 0;

int deltx = 0, delty = 0, deltz = 0;

int vibration = 2;

int devibrate = 75;

int magnitude = 0;

int sensitivity = 20;

double angle;

boolean impact_detected = false;

unsigned long time1;

unsigned long impact_time;

unsigned long alert_delay = 30000;

void setup()

{

Serial.begin(9600);

sim800.begin(9600);

neogps.begin(9600);

pinMode(BUZZER, OUTPUT);

pinMode(BUTTON, INPUT_PULLUP);

sms_status = "";

sender_number = "";

received_date = "";

msg = "";

sim800.println("AT");

delay(1000);

sim800.println("ATE1");

delay(1000);

sim800.println("AT+CPIN?");

delay(1000);

sim800.println("AT+CMGF=1");

delay(1000);

sim800.println("AT+CNMI=1,1,0,0,0");

delay(1000);

time1 = micros();

xaxis = analogRead(xPin);

yaxis = analogRead(yPin);

zaxis = analogRead(zPin);

}

void loop()

{

if (micros() - time1 > 4999) Impact();

if (updateflag > 0)

{

updateflag = 0;

Serial.println("Impact detected!!");

Serial.print("Magnitude:");

Serial.println(magnitude);

getGps();

digitalWrite(BUZZER, HIGH);

impact_detected = true;

impact_time = millis();

}

if (impact_detected == true)

{

if (millis() - impact_time >= alert_delay) {

digitalWrite(BUZZER, LOW);

makeCall();

delay(1000);

sendAlert();

impact_detected = false;

impact_time = 0;

}

if (digitalRead(BUTTON) == LOW) {

delay(200);

digitalWrite(BUZZER, LOW);

impact_detected = false;

impact_time = 0;

}

while (sim800.available()) {

parseData(sim800.readString());

}

while (Serial.available()) {

sim800.println(Serial.readString());

}

void Impact()

{

time1 = micros();

int oldx = xaxis;

int oldy = yaxis;

int oldz = zaxis;

xaxis = analogRead(xPin);

yaxis = analogRead(yPin);

zaxis = analogRead(zPin);

vibration--;

Serial.print("Vibration = ");

Serial.println(vibration);

if (vibration < 0) vibration = 0;

if (vibration > 0) return;

deltx = xaxis - oldx;

delty = yaxis - oldy;

deltz = zaxis - oldz;

magnitude = sqrt(sq(deltx) + sq(delty) + sq(deltz));

if (magnitude >= sensitivity) //impact detected

{

updateflag = 1;

vibration = devibrate;

}

else

{

magnitude = 0;

}

void parseData(String buff) {

Serial.println(buff);

unsigned int len, index;

index = buff.indexOf("\r");

buff.remove(0, index + 2);

buff.trim();

if (buff != "OK") {

index = buff.indexOf(":");

String cmd = buff.substring(0, index);

cmd.trim();

buff.remove(0, index + 2);

if (cmd == "+CMTI") {

index = buff.indexOf(",");

String temp = buff.substring(index + 1, buff.length());

temp = "AT+CMGR=" + temp + "\r";

sim800.println(temp);

}

else if (cmd == "+CMGR") {

if (buff.indexOf(EMERGENCY_PHONE) > 1) {

buff.toLowerCase();

if (buff.indexOf("get gps") > 1) {

getGps();

String sms_data;

sms_data = "GPS Location Data\r";

sms_data += "http://maps.google.com/maps?q=loc:";

sms_data += latitude + "," + longitude;

sendSms(sms_data);

}

else {

}

void getGps()

{

// Can take up to 60 seconds

boolean newData = false;

for (unsigned long start = millis(); millis() - start < 2000;) {

while (neogps.available()) {

if (gps.encode(neogps.read())) {

newData = true;

break;

}

if (newData)

{

latitude = String(gps.location.lat(), 6);

longitude = String(gps.location.lng(), 6);

newData = false;

}

else {

Serial.println("No GPS data is available");

latitude = "";

longitude = "";

}

Serial.print("Latitude= "); Serial.println(latitude);

Serial.print("Lngitude= "); Serial.println(longitude);

}

void sendAlert()

{

String sms_data;

sms_data = "Accident Alert!!\r";

sms_data += "http://maps.google.com/maps?q=loc:";

sms_data += latitude + "," + longitude;

sendSms(sms_data);

}

void makeCall()

{

Serial.println("calling....");

sim800.println("ATD" + EMERGENCY_PHONE + ";");

delay(20000); //20 sec delay

sim800.println("ATH");

delay(1000); //1 sec delay

}

void sendSms(String text)

{

//return;

sim800.print("AT+CMGF=1\r");

delay(1000);

sim800.print("AT+CMGS=\"" + EMERGENCY_PHONE + "\"\r");

delay(1000);

sim800.print(text);

delay(100);

sim800.write(0x1A);

delay(1000);

Serial.println("SMS Sent Successfully.");

}

boolean SendAT(String at_command, String expected_answer, unsigned int timeout) {

uint8_t x = 0;

boolean answer = 0;

String response;

unsigned long previous;

while ( sim800.available() > 0) sim800.read();

sim800.println(at_command);

x = 0;

previous = millis();

do {

if (sim800.available() != 0) {

response += sim800.read();

x++;

if (response.indexOf(expected_answer) > 0) {

answer = 1;

break;

}

while ((answer == 0) && ((millis() - previous) < timeout));

Serial.println(response);

return answer;

}

Demo Of Project

Output Of The Project

In 1st Image, The ADXL-335 Sensor Detecd Is Rafe Movement Then GSM Send The Text Message To a particular Mobile Number

When You Click The Text Message The Link Will Activated And Open

In Google Maps You Track The location In Real Time With The Help Of GPS

If You are Interested In More Projects Then Plz Check Out

Vehicle Accident Alert System