VEHICLE CRASH MONITORING SYSTEM, PART- 3

You have now learned how to connect the sensor and the GPS to the microcontroller. If you started reading from this blog you can first refer to my blogs containing earlier parts at –

https://abishaisingh.wordpress.com/2012/06/17/vehicle-crash-monitoring-system-part-2/

and

https://abishaisingh.wordpress.com/2012/06/06/vehicle-crash-monitoring-systempart-1/

Now the last thing required in our project and that is the GSM modem. I had written about the GSM modem i.e SIM 300 in my earlier blogs which you can see at –

https://abishaisingh.wordpress.com/2012/06/03/gsm-modem-sim-300-sending-text-sms-arduino/

After doing these things, we can individually sense, find location and send SMS. But for my project it is essential to do all the 3 things simultaneously. So that whenever an accident is detected, it should find the location of the spot and send the location at the emergency number for calling for help.

So, the final setup which I made looked something like this –

I packed the three things in a box. The 2 modems and arduino is packed in a plastic box for protection. The adaptor ports of all the three boards are connected with a main port which is used to connect with a single 12 volt adaptor. The whole setup is shown below –

And the back view –

The above pictures were taken at the time of my project i.e when I was doing my engineering and working on this project.

Now after finishing the hardware, its time to write the arduino code. The code which I had written is shown below:-

//The code is written by Abishai.

#include <SoftwareSerial.h>

const int ledPin = 13;

const int crashSensor = A0;

const int threshold = 4;

int sensorReading = 0;

#define rxPin 9

#define txPin 8

SoftwareSerial gps = SoftwareSerial(rxPin, txPin);

byte byteGPS = 0;

int i = 0;

int h = 0;

char inBuffer[300] = “”;

char GPS_RMC[100]=””;

void setup(){

pinMode(rxPin, INPUT);

pinMode(txPin, OUTPUT);

gps.begin(9600);

Serial.begin(9600);

pinMode(ledPin, OUTPUT);

delay(1000);

}

void loop(){

delay(1000);

sensorReading = analogRead(crashSensor);

if (sensorReading >= threshold) {

digitalWrite(ledPin, HIGH);

Serial.println(“AT”);

delay(2000);

Serial.println(“AT+CMGF=1”);

delay(1500);

Serial.print(“AT+CMGS=”);

Serial.print(34,BYTE);

Serial.print(“+919685290322”);

Serial.println(34,BYTE);

byteGPS = 0;

byteGPS = gps.read();

while(byteGPS != ‘R’){

byteGPS = gps.read();

}

GPS_RMC[0]=’$’;

GPS_RMC[1]=’G’;

GPS_RMC[2]=’P’;

GPS_RMC[3]=’R’;

i = 4;

while(byteGPS != ‘*’){

byteGPS = gps.read();

inBuffer[i]=byteGPS;

GPS_RMC[i]=byteGPS;

i++;

}

Serial.print(“Location Is: “);

h = 0;

while(GPS_RMC[h] != 42){

Serial.print(GPS_RMC[h],BYTE);

h++;

}

delay(1500);

Serial.println(26,BYTE);

while(1);

delay (60000);

}

}

My project is working properly. There are many future expansion for my project which can make it best and most useful for the injured person.

You can watch working of my project on youtube from the link below :-

Please do comment.