//#include<LiquidCrystal.h>//LiquidCrystal lcd(12, 11, 5, 4int LED=13;char str[70];char *test="$GPGGA"; char logitude[10];char latitude[10];int i,j,k;int temp;int analogPin = 3 ; int temp1 = 220 ; int val = 0 ; // variable to store the value readint buzz = 2;

void setup(){ Serial.begin(9600); // setup serial}

void loop(){ val = analogRead(analogPin); // read the input pin Serial.println(val); if (val >temp1) { digitalWrite(LED,HIGH); //blink the led delay(1000); digitalWrite(LED,LOW); delay(1000); if (temp==1) { delay(1000); for(i=18;i<27;i++) //extract latitude from string { delay(20); latitude[j]=str[i]; j++; } delay(1000); k=0; for(i=30;i<39;i++) //extract longitude from string { logitude[k]=str[i]; k++; } Serial.println("longitude"); Serial.println(latitude); delay(100); Serial.println("AT"); //sends AT commands to the GSM blnk(); Serial.println("AT+CREG?"); blnk(); Serial.println("AT+CMGF=1"); blnk(); Serial.println("AT+CNMI=2,1,0,0"); blnk(); Serial.println("AT+CMGS=\"8892446831\""); //enter the conserned number blnk(); digitalWrite(LED,LOW); digitalWrite(buzz,HIGH);

blnk(); Serial.println("Alert"); //sends alert message Serial.println("Person in Danger"); Serial.println("Present GPS Co-ordinates"); Serial.print("Latitude(N): "); //enter latitude in msg Serial.println(latitude); //enter latitude value in msg Serial.print("Longitude(E): "); Serial.print(logitude); //enter longitude value in msg Serial.println(char(26)); //send msg Ctrl+z=26 temp=0; i=0; j=0; k=0; delay(20000); // next reading within 20 seconds } // debug value}}void serialEvent(){ while (Serial.available()) //Serial incomming data from GPS { char inChar = (char)Serial.read(); str[i]= inChar; //store incomming data from GPS to temparary string str[] i++; if (i < 7) { if(str[i-1] != test[i-1]) //check for right string { i=0; } } if(i >=60) { temp=1; } }}void blnk() //used to give delay and blink the led's{digitalWrite(LED,HIGH);delay(2000);digitalWrite(LED,LOW);delay(2000);}