Vehicle Accident Alert System Using Accelerometer

Vehicle Accident Alert Using Accelerometer GPS And GSM

Prateek 25/11/2023

0 3,961 2 minutes read

Table of Contents

Introduction

In This Article, we design a Vehicle Accident Alert System using an ADXL-335 Sensor, Measuring the Impact of the Accident And giving information on which side More Impact happened if crosses the threshold value and then sending an SMS with proper GPS coordinates

Bill Of Materials

S.N	Component's	Quantity	Link To Buy
1	Arduino nano	1
2	ADXL345 Module	1
3	SIM800l GSM Module	1
4	NEO-6m Module	1
5	LM2596 Step Down Conveter	1
6	Push Button	1
7	10k resister	1
8	Zero PCB	1
9	3.7v lithium-Ion Battery	2

Component’s

Arduino Nano

The Arduino Nano is the open-source smallest Embedded Development board based on Atmega328 SMD Package Microcontroller.
Arduino Nano is a low-cost microcontroller and so many GPIO Pin available.

ADXL335

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.

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.

SIM800l GSM Module

You can communicate with the SIM800l module via the UART port, which supports the AT command.

Features

Quad-band 850/900/1800/1900MHz – connect to any global GSM network.
Make and receive voice calls using a headset or an external 8Ω speaker and electret microphone.
AT command interface with “auto baud” detection.
Send and receive SMS messages.
Send and receive GPRS data (TCP/IP, HTTP, etc.).

LM2596 Step Down Conveter

LM2596 DC-DC Buck Converter Adjustable Step-Down Power Supply Module is this project we used the provide proper 3.7v to sim800l GSM Module.

NEO-6m Module

The GPS module is based on the NEO-6M. This unit uses the latest technology to give the best possible positioning information and includes a larger built-in 25 x 25mm active GPS antenna with a UART TTL socket.

Features

5Hz position update rate
Operating temperature range: -40 TO 85°CUART TTL socket
EEPROM to save configuration settings
Rechargeable battery for Backup
Supply voltage: 3.3 V to 5V.
Configurable from 4800 Baud to 115200 Baud rates.

Circuit diagram

In this circuit, we show the proper pin where we conected the modules.

Like, the GPS Module is conected to Pin Numbers D9, and D8 in Arduino nano microcontroller.
Sim800l GSM Module is conected to the D2 And D3 Pin of Arduino Nano.
ADXL-335 Sensor is conected to the PIN Numbers A0, A1, and A2.
And We used the One Push Button And is conected to the Pin Number D11.

Code

Before you Upload the code install the TinyGPS library in your Arduino IDE Software.

TinyGPS.h

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

const String EMERGENCY_PHONE = "+9188305848xx";
//GSM Module Conected Pin D2 & D3
#define rxPin 2
#define txPin 3
SoftwareSerial sim800(rxPin, txPin);

//GPS Modue Conected Pin D9 & D8
AltSoftSerial neogps;
TinyGPSPlus gps;

String sms_status, sender_number, received_date, msg;
String latitude, longitude;

#define BUZZER 12
#define BUTTON 11
#define xPin A1
#define yPin A2
#define zPin A3

byte updateflag;

int xaxis = 0, yaxis = 0, zaxis = 0;
int deltx = 0, delty = 0, deltz = 0;
int vibration = 2, 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);

  Serial.println("SIM800L serial initialize");
  sim800.begin(9600);
  Serial.println("NEO6M serial initialize");
  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 > 1999) 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--;
  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) {
    updateflag = 1;
    vibration = devibrate;
  } else {
    if (magnitude > 15)
      Serial.println(magnitude);
    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() {

  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);
  sim800.println("ATH");
  delay(1000);
}

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;

  //Clean the input buffer
  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;
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

#include <AltSoftSerial.h>

#include <TinyGPS++.h>

#include <SoftwareSerial.h>

#include <math.h>

#include <Wire.h>

const String EMERGENCY_PHONE = "+9188305848xx";

//GSM Module Conected Pin D2 & D3

#define rxPin 2

#define txPin 3

SoftwareSerial sim800(rxPin, txPin);

//GPS Modue Conected Pin D9 & D8

AltSoftSerial neogps;

TinyGPSPlus gps;

String sms_status, sender_number, received_date, msg;

String latitude, longitude;

#define BUZZER 12

#define BUTTON 11

#define xPin A1

#define yPin A2

#define zPin A3

byte updateflag;

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

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

int vibration = 2, 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);

Serial.println("SIM800L serial initialize");

sim800.begin(9600);

Serial.println("NEO6M serial initialize");

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 > 1999) 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--;

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) {

updateflag = 1;

vibration = devibrate;

} else {

if (magnitude > 15)

Serial.println(magnitude);

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() {

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);

sim800.println("ATH");

delay(1000);

}

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;

//Clean the input buffer

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;

}

With 16×2 LCD Display

Liquid Crystal I2C Library

//Prateek
//https://justdoelectronics.com
//https://www.youtube.com/@JustDoElectronics/videos

#include <LiquidCrystal_I2C.h>
#include <AltSoftSerial.h>
#include <TinyGPS++.h>
#include <SoftwareSerial.h>
#include <math.h>
#include <Wire.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const String EMERGENCY_PHONE = "+9188305848xx";
//GSM Module Conected Pin D2 & D3
#define rxPin 2
#define txPin 3
SoftwareSerial sim800(rxPin, txPin);

//GPS Modue Conected Pin D9 & D8
AltSoftSerial neogps;
TinyGPSPlus gps;

String sms_status, sender_number, received_date, msg;
String latitude, longitude;

#define BUZZER 12
#define BUTTON 11
#define xPin A1
#define yPin A2
#define zPin A3

byte updateflag;

int xaxis = 0, yaxis = 0, zaxis = 0;
int deltx = 0, delty = 0, deltz = 0;
int vibration = 2, 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);

  Serial.println("SIM800L serial initialize");
  sim800.begin(9600);
  Serial.println("NEO6M serial initialize");
  neogps.begin(9600);
  pinMode(BUZZER, OUTPUT);
  pinMode(BUTTON, INPUT_PULLUP);
  lcd.init();
  lcd.backlight();
  lcd.clear();

  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 > 1999) 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();

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Crash Detected");
    lcd.setCursor(0, 1);
    lcd.print("Magnitude:" + String(magnitude));
  }

  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--;
  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) {
    updateflag = 1;
    vibration = devibrate;
  } else {
    if (magnitude > 15)
      Serial.println(magnitude);
    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 = "Car Accident Alert at\r";
          sms_data += "http://maps.google.com/maps?q=loc:";
          sms_data += latitude + "," + longitude;

          sendSms(sms_data);
        }
      }
    }

  } else {
  }
}

void getGps() {

  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 = "Emergency Alert at\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);
  sim800.println("ATH");
  delay(1000);
}

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;

  //Clean the input buffer
  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;
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

//Prateek

//https://justdoelectronics.com

//https://www.youtube.com/@JustDoElectronics/videos

#include <LiquidCrystal_I2C.h>

#include <AltSoftSerial.h>

#include <TinyGPS++.h>

#include <SoftwareSerial.h>

#include <math.h>

#include <Wire.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const String EMERGENCY_PHONE = "+9188305848xx";

//GSM Module Conected Pin D2 & D3

#define rxPin 2

#define txPin 3

SoftwareSerial sim800(rxPin, txPin);

//GPS Modue Conected Pin D9 & D8

AltSoftSerial neogps;

TinyGPSPlus gps;

String sms_status, sender_number, received_date, msg;

String latitude, longitude;

#define BUZZER 12

#define BUTTON 11

#define xPin A1

#define yPin A2

#define zPin A3

byte updateflag;

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

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

int vibration = 2, 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);

Serial.println("SIM800L serial initialize");

sim800.begin(9600);

Serial.println("NEO6M serial initialize");

neogps.begin(9600);

pinMode(BUZZER, OUTPUT);

pinMode(BUTTON, INPUT_PULLUP);

lcd.init();

lcd.backlight();

lcd.clear();

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 > 1999) 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();

lcd.clear();

lcd.setCursor(0, 0);

lcd.print("Crash Detected");

lcd.setCursor(0, 1);

lcd.print("Magnitude:" + String(magnitude));

}

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--;

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) {

updateflag = 1;

vibration = devibrate;

} else {

if (magnitude > 15)

Serial.println(magnitude);

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 = "Car Accident Alert at\r";

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

sms_data += latitude + "," + longitude;

sendSms(sms_data);

}

} else {

}

void getGps() {

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 = "Emergency Alert at\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);

sim800.println("ATH");

delay(1000);

}

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;

//Clean the input buffer

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;

}

Working Module

Here We Used The ADXL-345 Sensor if any impact is detected and crosses the set threshold value then it sends the proper GPS Location.

If Any Emergency we press the push button and then also send the SMS “Emergency Alert” And Proper GPS Location.

If We Click the location Link the Automatic Google MAP Software Is open is track where the Person is Available.

Video

Conclusion

In this project, we designed the Vehicle Accident Alert System and it works fine But if you try to use another GSM Module then you also use it same case in the GPS Module. if you change it is not required to change the code.
I hope you Like This project plz share it With your Friends and if you have any doubts then plz comment we try to solve the problem.

Vehicle Accident Alert System

Introduction

Bill Of Materials

Component’s

Arduino Nano

ADXL335

SIM800l GSM Module

LM2596 Step Down Conveter

NEO-6m Module

Circuit diagram

Code

Video

Conclusion

Prateek

ESP32 LM35 Temperature Sensor

Home automation using arduino and bluetooth

Leave a Reply

Related Articles

Water Level Sensor Tutorial

Temperature Based Fan Speed Controll

Sign Language to Text Conversion Using Flex Sensor

Home automation using arduino and bluetooth

Adblock Detected