I am trying to make a project on Accident detect and rescue system using GSM SIM 800 module , GPS NEO6M and ACCELEROMETER ADXL345 but unable to get the gps location the loop gpsEvent() goeson for ever can you Please help me out.
I have taken the code reference from the this link Arduino Based Vehicle Accident Alert System Project using GPS, GSM and Accelerometer
and made few changes of my own in code but unable to get the desired output Please help.
My complete code is below the function gpsEvent() which is used to extract the string from the data goes on for ever can see and tell me why this is happening
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_ADXL345_U.h>
#include<SoftwareSerial.h>
SoftwareSerial Serial1(2,3); //make RX arduino line is pin 2, make TX arduino line is pin 3.
SoftwareSerial gps(11,10);
Adafruit_ADXL345_Unified accel = Adafruit_ADXL345_Unified(12345);
int xsample=0;
int ysample=0;
int zsample=0;
#define samples 10
#define minVal -50
#define MaxVal 50
int i=0,k=0;
int gps_status=0;
float latitude=0;
float logitude=0;
String Speed="";
String gpsString="";
char *test="$GPRMC";
void initModule(String cmd, char *res, int t)
{
while(1)
{
Serial.println(cmd);
Serial1.println(cmd);
delay(100);
while(Serial1.available()>0)
{
if(Serial1.find(res))
{
Serial.println(res);
delay(t);
return;
}
else
{
Serial.println("Error");
}
}
delay(t);
}
}
void setup()
{
Serial1.begin(9600);
Serial.begin(9600);
if(!accel.begin())
{
/* There was a problem detecting the ADXL345 ... check your connections */
Serial.println("Ooops, no ADXL345 detected ... Check your wiring!");
while(1);
}
accel.setRange(ADXL345_RANGE_16_G);
Serial.println("Initializing....");
//initModule("AT","OK",1000);
//initModule("ATE1","OK",1000);
//initModule("AT+CPIN?","READY",1000);
//initModule("AT+CMGF=1","OK",1000);
//initModule("AT+CNMI=2,2,0,0,0","OK",1000);
Serial.println("Initialized Successfully");
for(int i=0;i<samples;i++)
{
sensors_event_t event;
accel.getEvent(&event);
xsample+=event.acceleration.x;
ysample+=event.acceleration.y;
zsample+=event.acceleration.z;
}
xsample/=samples;
ysample/=samples;
zsample/=samples;
Serial.println(xsample);
Serial.println(ysample);
Serial.println(zsample);
delay(1000);
gps.begin(9600);
get_gps();
show_coordinate();
delay(2000);
Serial.println("System Ready..");
}
void loop()
{
sensors_event_t event;
accel.getEvent(&event);
int xValue=xsample-event.acceleration.x;
int yValue=ysample-event.acceleration.y;
int zValue=zsample-event.acceleration.z;
Serial.print("x=");
Serial.println(xValue);
Serial.print("y=");
Serial.println(yValue);
Serial.print("z=");
Serial.println(zValue);
if(xValue < minVal || xValue > MaxVal || yValue < minVal || yValue > MaxVal || zValue < minVal || zValue > MaxVal)
{
get_gps();
show_coordinate();
Serial.println("Sending SMS");
Send();
Serial.println("SMS Sent");
delay(2000);
}
}
void gpsEvent()
{
gpsString="";
while(1)
{
while (gps.available()>0) //Serial incoming data from GPS
{
char inChar = (char)gps.read();
gpsString+= inChar; //store incoming data from GPS to temparary string str[]
i++;
//Serial.print(inChar);
Serial.print(gpsString);
if (i < 7)
{
if(gpsString[i-1] != test[i-1]) //check for right string
{
i=0;
gpsString="";
}
}
if(inChar=='\r'|| inChar == '\n')
{
if(i>60)
{
gps_status=1;
break;
}
else
{
i=0;
}
}
}
if(gps_status)
break;
}
}
void get_gps()
{
gps_status=0;
int x=0;
while(gps_status==0)
{
gpsEvent();
int str_lenth=i;
coordinate2dec();
i=0;x=0;
str_lenth=0;
}
}
void show_coordinate()
{
Serial.println("Latitude:");
Serial.println(latitude);
Serial.print("Longitude:");
Serial.println(logitude);
Serial.print("Speed(in knots)=");
Serial.println(Speed);
delay(2000);
}
void coordinate2dec()
{
String lat_degree="";
for(i=20;i<=21;i++)
lat_degree+=gpsString[i];
String lat_minut="";
for(i=22;i<=28;i++)
lat_minut+=gpsString[i];
String log_degree="";
for(i=32;i<=34;i++)
log_degree+=gpsString[i];
String log_minut="";
for(i=35;i<=41;i++)
log_minut+=gpsString[i];
Speed="";
for(i=45;i<48;i++) //extract longitude from string
Speed+=gpsString[i];
float minut= lat_minut.toFloat();
minut=minut/60;
float degree=lat_degree.toFloat();
latitude=degree+minut;
minut= log_minut.toFloat();
minut=minut/60;
degree=log_degree.toFloat();
logitude=degree+minut;
}
void Send()
{
Serial1.println("AT");
delay(500);
serialPrint();
Serial1.println("AT+CMGF=1");
delay(500);
serialPrint();
Serial1.print("AT+CMGS=");
Serial1.print('"');
Serial1.print("9821757249"); //mobile no. for SMS alert
Serial1.println('"');
delay(500);
serialPrint();
Serial1.print("Latitude:");
Serial1.println(latitude);
delay(500);
serialPrint();
Serial1.print(" longitude:");
Serial1.println(logitude);
delay(500);
serialPrint();
Serial1.print(" Speed:");
Serial1.print(Speed);
Serial1.println("Knots");
delay(500);
serialPrint();
Serial1.print("http://maps.google.com/maps?&z=15&mrt=yp&t=k&q=");
Serial1.print(latitude,6);
Serial1.print("+"); //28.612953, 77.231545 //28.612953,77.2293563
Serial1.print(logitude,6);
Serial1.write(26);
delay(2000);
serialPrint();
}
void serialPrint()
{
while(Serial1.available()>0)
{
Serial.print(Serial1.read());
}
}