hello im izzat from malaysia
i wanna ask someone who can help me for my accident alert system project
im using arduino uno , gsm 900a , gps neo 6m , accelerometer
already compile the command but the location is detect in china and keep repeate the same location
someone can plss fix my problem , the command is attach and no error
Accident_Alert_System.ino (6.48 KB)
Have you a working short program that gets the location from the GPS and displays it on the Serial Monitor?
If not, start with that.
...R
Hi!
Please, read the advice how to attach code to Your question. Use code tags, the </> symbol. That makes it much better for Forum people to look at it.
I also use a NEO 6M for my portable speedindicator and it works well telling speed, date, time, altitude and direction. However I have not used the latitude and longitude data. During my design people here i Forum showed me that the position, lats and longs, can fly around some 10, 50 ,100 meters. I don't remember exactly.
But, to read a position in China when it should be Indonesia, that is to much. Something is wrong.
OP's code
#include<SoftwareSerial.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
SoftwareSerial Serial1(10,11); //make RX arduino line is pin 2, make TX arduino line is pin 3.
SoftwareSerial gps(3,4);
#define x A1
#define y A2
#define z A3
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);
lcd.begin(16,2);//Defining 16 columns and 2 rows of lcd display
lcd.backlight();//To Power ON the back light
//lcd.backlight();// To Power OFF the back light
lcd.print("Accident Alert ");
lcd.setCursor(0,1);
lcd.print(" System ");
delay(2000);
lcd.clear();
lcd.print("Initializing");
lcd.setCursor(0,1);
lcd.print("Please Wait...");
delay(1000);
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");
lcd.clear();
lcd.print("Initialized");
lcd.setCursor(0,1);
lcd.print("Successfully");
delay(2000);
lcd.clear();
lcd.print("Callibrating ");
lcd.setCursor(0,1);
lcd.print("Acceleromiter");
for(int i=0;i<samples;i++)
{
xsample+=analogRead(x);
ysample+=analogRead(y);
zsample+=analogRead(z);
}
xsample/=samples;
ysample/=samples;
zsample/=samples;
Serial.println(xsample);
Serial.println(ysample);
Serial.println(zsample);
delay(1000);
lcd.clear();
lcd.print("Waiting For GPS");
lcd.setCursor(0,1);
lcd.print(" Signal ");
delay(2000);
gps.begin(9600);
get_gps();
show_coordinate();
delay(2000);
lcd.clear();
lcd.print("GPS is Ready");
delay(1000);
lcd.clear();
lcd.print("System Ready");
Serial.println("System Ready..");
}
void loop()
{
int value1=analogRead(x);
int value2=analogRead(y);
int value3=analogRead(z);
int xValue=xsample-value1;
int yValue=ysample-value2;
int zValue=zsample-value3;
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();
lcd.clear();
lcd.print("Sending SMS ");
Serial.println("Sending SMS");
Send();
Serial.println("SMS Sent");
delay(2000);
lcd.clear();
lcd.print("System Ready");
}
}
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);
if (i < 7)
{
if(gpsString[i-1] != test[i-1]) //check for right string
{
i=0;
gpsString="";
}
}
if(inChar=='\r')
{
if(i>60)
{
gps_status=1;
break;
}
else
{
i=0;
}
}
}
if(gps_status)
break;
}
}
void get_gps()
{
lcd.clear();
lcd.print("Getting GPS Data");
lcd.setCursor(0,1);
lcd.print("Please Wait.....");
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()
{
lcd.clear();
lcd.print("Lat:");
lcd.print(latitude);
lcd.setCursor(0,1);
lcd.print("Log:");
lcd.print(logitude);
Serial.print("Latitude:");
Serial.println(latitude);
Serial.print("Longitude:");
Serial.println(logitude);
Serial.print("Speed(in knots)=");
Serial.println(Speed);
delay(2000);
lcd.clear();
lcd.print("Speed(Knots):");
lcd.setCursor(0,1);
lcd.print(Speed);
}
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("+60175216020"); //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());
}
}
Is there a compelling reason why you are not using one of the standard GPS libraries for Arduino ?
These libraries work well, are consistent and don't use Strings.
Robin2:
Have you a working short program that gets the location from the GPS and displays it on the Serial Monitor?If not, start with that.
...R
i already have complete the short program and it working smoothly , but when using this command its going produce a same location
srnet:
Is there a compelling reason why you are not using one of the standard GPS libraries for Arduino ?These libraries work well, are consistent and don't use Strings.
okey i will try using the library . tq
SoftwareSerial Serial1(10,11); //make RX arduino line is pin 2, make TX arduino line is pin 3.
SoftwareSerial gps(3,4);
You are aware that you can only listen to one instance of the SoftwareSerial class at a time, right?
When you are listening to the GPS, you will miss data from the modem. When you are listening to the modem, you will miss data from the GPS.
You assume that latitude and longitude will be in fixed places in the GPS stream. That is not even close to a valid assumption.
You assume that the GPS is only sending GPRMC sentences. Not a valid assumption, either.