Published September 15, 2019

Smart Car – Accident Detection and Notification Using Amazon

A smart car that detects accidents and notifies relatives and health organisations using Alexa, mail, SMS and phone notification services.

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Smart Car – Accident Detection and Notification Using Amazon

Things used in this project

Hardware components

Arduino Mega 2560

Arduino UNO

Raspberry Pi 3 Model B

Amazon Alexa Amazon Echo

WIZnet W600 ethernet Shield

Software apps and online services

Node-RED

Amazon Alexa Alexa Skills Kit

Arduino IDE

Raspberry Pi Raspbian

Amazon Web Services AWS Lambda

Story

The high demand for automobiles has increased traffic hazards and road accidents. Life of the people is under high risk. This is because of the lack of the best emergency facilities available in the country. Alexa is Amazon’s cloud-based voice service available on tens of millions of devices from Amazon and third-party device manufacturers. The proposed system can detect accidents in significantly less time and sends the basic information first to aid center and relatives of the victim on mobile and Amazon Alexa within a few seconds covering geographical coordinates.Various devices like Arduino UNO for car movement demonstration, Arduino Mega for accident detection and Raspberry Pi 3B for internet services gateway have been used along with sensors like HC05 Bluetooth module to control the car through Android Application, accelerometer and impact sensor working together to detect an accident. They are connected over the internet to generates a huge amount of data, and this data holds a lot of information about the occurrence of the accident based on the speed of vehicles and also the location and can be used to detect accident hotspots. The system also focuses on the safety of pedestrians where a safety band is programmed to perform the notification services using an emergency push button. The ESP8266 Node MCU module is programmed in a way that the same services can be invoked using a button on the module. The data generated may be used for the prediction, analysis to prevent future accidents and contribute to future road safety.

Code

#define in1 5 //L298n Motor Driver pins.
#define in2 6
#define in3 10
#define in4 11
#define LED 13
int command; //Int to store app command state.
int Speedsec;
void setup() {
  pinMode(in1, OUTPUT);
  pinMode(in2, OUTPUT);
  pinMode(in3, OUTPUT);
  pinMode(in4, OUTPUT);
  pinMode(LED, OUTPUT); //Set the LED pin.
  Serial.begin(9600);  //Set the baud rate to your Bluetooth module.
}

void loop() {
  if (Serial.available() > 0) {
    command = Serial.read();
    Stop(); //Initialize with motors stoped.
    Serial.println(command);
    switch (command) {
      case 70:
        forward();
        break;
      case 66:
        back();
        break;
      case 76:
        left();
        break;
      case 82:
        right();
        break;
      
    }
    
  }
}

void forward() {
  digitalWrite(in1, HIGH);
  digitalWrite(in3, HIGH);
}

void back() {
  digitalWrite(in2, HIGH);
  digitalWrite(in4, HIGH);
}

void left() {
  digitalWrite(in3, HIGH);
}

void right() {
  digitalWrite(in1, HIGH);
}
void Stop() {
  digitalWrite(in1, LOW);
  digitalWrite(in2, LOW);
  digitalWrite(in3, LOW);
  digitalWrite(in4, LOW);
}



Vibration sensor
int vib_pin=7;
int led_pin=13;
void setup() {
  pinMode(vib_pin,INPUT);
  pinMode(led_pin,OUTPUT);
}

void loop() {
  int val;
  val=digitalRead(vib_pin);
  if(val==1)
  {
    digitalWrite(led_pin,HIGH);
    delay(1000);
    digitalWrite(led_pin,LOW);
    delay(1000);
   }
   else
   digitalWrite(led_pin,LOW);
}

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_ADXL345_U.h>
Adafruit_ADXL345_Unified accel = Adafruit_ADXL345_Unified(12345);

void displaySensorDetails(void)
{
sensor_t sensor;
accel.getSensor(&sensor);
Serial.println("————————————");
Serial.print ("Sensor: "); Serial.println(sensor.name);
Serial.print ("Driver Ver: "); Serial.println(sensor.version);
Serial.print ("Unique ID: "); Serial.println(sensor.sensor_id);
Serial.print ("Max Value: "); Serial.print(sensor.max_value); Serial.println(" m/s^2");
Serial.print ("Min Value: "); Serial.print(sensor.min_value); Serial.println(" m/s^2");
Serial.print ("Resolution: "); Serial.print(sensor.resolution); Serial.println(" m/s^2"); 
Serial.println("————————————");
Serial.println("");
delay(500);
}

void displayDataRate(void)
{
Serial.print ("Data Rate: ");

switch(accel.getDataRate())
{
case ADXL345_DATARATE_3200_HZ:
Serial.print ("3200 "); 
break;
case ADXL345_DATARATE_1600_HZ:
Serial.print ("1600 "); 
break;
case ADXL345_DATARATE_800_HZ:
Serial.print ("800 "); 
break;
case ADXL345_DATARATE_400_HZ:
Serial.print ("400 "); 
break;
case ADXL345_DATARATE_200_HZ:
Serial.print ("200 "); 
break;
case ADXL345_DATARATE_100_HZ:
Serial.print ("100 "); 
break;
case ADXL345_DATARATE_50_HZ:
Serial.print ("50 "); 
break;
case ADXL345_DATARATE_25_HZ:
Serial.print ("25 "); 
break;
case ADXL345_DATARATE_12_5_HZ:
Serial.print ("12.5 "); 
break;
case ADXL345_DATARATE_6_25HZ:
Serial.print ("6.25 "); 
break;
case ADXL345_DATARATE_3_13_HZ:
Serial.print ("3.13 "); 
break;
case ADXL345_DATARATE_1_56_HZ:
Serial.print ("1.56 "); 
break;
case ADXL345_DATARATE_0_78_HZ:
Serial.print ("0.78 "); 
break;
case ADXL345_DATARATE_0_39_HZ:
Serial.print ("0.39 "); 
break;
case ADXL345_DATARATE_0_20_HZ:
Serial.print ("0.20 "); 
break;
case ADXL345_DATARATE_0_10_HZ:
Serial.print ("0.10 "); 
break;
default:
Serial.print ("???? "); 
break;
} 
Serial.println(" Hz"); 
}

void displayRange(void)
{
Serial.print ("Range: +/- ");

switch(accel.getRange())
{
case ADXL345_RANGE_16_G:
Serial.print ("16 "); 
break;
case ADXL345_RANGE_8_G:
Serial.print ("8 "); 
break;
case ADXL345_RANGE_4_G:
Serial.print ("4 "); 
break;
case ADXL345_RANGE_2_G:
Serial.print ("2 "); 
break;
default:
Serial.print ("?? "); 
break;
} 
Serial.println(" g"); 
}

void setup(void) 
{
Serial.begin(9600);
Serial.println("Accelerometer Test"); Serial.println("");

if(!accel.begin())
{

Serial.println("Ooops, no ADXL345 detected … Check your wiring!");
while(1);
}


accel.setRange(ADXL345_RANGE_16_G);

displaySensorDetails();
displayDataRate();
displayRange();
Serial.println("");
}

void loop(void) 
{ 
sensors_event_t event; 
accel.getEvent(&event);
Serial.print("X: "); Serial.print(event.acceleration.x); Serial.print(" ");
Serial.print("Y: "); Serial.print(event.acceleration.y); Serial.print(" ");
Serial.print("Z: "); Serial.print(event.acceleration.z); Serial.print(" ");Serial.println("m/s^2 ");
delay(500);
}