Hlo to all.
I want code for my project which is railway accident prevention system using Arduino
Basically I want the code for turn ON buzzer and leds present at platform with the help of geo fencing of GPS. IT means when the train enters into the geofence around the station, the buzzer present at platform will be turn ON
Please help me if any one understands my problem .
Welcome to the forum
You will get help from the forum but you are expected to do most of the work yourself unless you are prpared to pay for someone to do it for you
So, which Arduino board and GPS have you got and what have you tried so far ? Can you read your current latitude and longitude from the GPS and print it on the Serial monitor ?
I want the basic idea how to turn on buzzer at different locations when train enter into the geo fence. I done the code but the buzzer is present with GPS module. I want the code to turn on buzzer separately without attaching in GPS module circuit.
This statement doesn't make sense to me. Are you saying the buzzer is on the GPS module? What GPS module are you using?
Can you please post your current code?
We need more details such as whether the buzzer is active (makes a noise when connected to 5V and GND) or passive (needs a signal at the required frequency in order to make a noise)
Post the code that you have, using code tags (the </> icon) when you do
How big is the train? GPS is only accurate to a few meters.
...and I hope this is a school project. I wouldn't want my life to depend on an Arduino and $15 GPS module.
I agree, it would be better to splash out on a $20 GPS for such a safety critical system 
I worry more about the code writer.
Can we turn ON buzzer and led by GPS module neo 6m module.
The whole idea is that I want turn on led and buzzer located at far end when an object enters into the geo fence.
Please give me idea about code and hardware.
I have a code but the buzzer is attach to the GPS module circuit.
There are plenty of geofencing articles and code examples on line. It is pretty simple to implement, and an Arduino Uno, Nano or Pro Mini, and any functional Arduino-compatible GPS module will get you going.
the buzzer is attach to the GPS module circuit
That is most unusual.
This is the code , object goes out of geo fencing also buzzer is attach to the GPS module circuit.
But I want to place buzzer away from the circuit and turned ON when object enters into Geo fencing.
#include <SoftwareSerial.h>
#include <AltSoftSerial.h>
#include <TinyGPS++.h>
//--------------------------------------------------------------
//enter your personal phone number to receive sms alerts.
//phone number must start with country code.
const String PHONE = "ENTER_PHONE_NUMBER";
//--------------------------------------------------------------
//GSM Module RX pin to Arduino 3
//GSM Module TX pin to Arduino 2
#define rxPin 2
#define txPin 3
SoftwareSerial sim800(rxPin,txPin);
//--------------------------------------------------------------
//GPS Module RX pin to Arduino 9
//GPS Module TX pin to Arduino 8
AltSoftSerial neogps;
TinyGPSPlus gps;
//--------------------------------------------------------------
#define BUZZER 4
// Alarm
int buzzer_timer = 0;
bool alarm = false;
boolean send_alert_once = true;
//--------------------------------------------------------------
// Size of the geo fence (in meters)
const float maxDistance = 30;
//--------------------------------------------------------------
float initialLatitude = 0;
float initialLongitude = 0;
float latitude, longitude;
//--------------------------------------------------------------
void getGps(float& latitude, float& longitude);
/*****************************************************************************************
* setup() function
*****************************************************************************************/
void setup()
{
//--------------------------------------------------------------
//Serial.println("Arduino serial initialize");
Serial.begin(9600);
//--------------------------------------------------------------
//Serial.println("SIM800L serial initialize");
sim800.begin(9600);
//--------------------------------------------------------------
//Serial.println("NEO6M serial initialize");
neogps.begin(9600);
//--------------------------------------------------------------
pinMode(BUZZER, OUTPUT);
//--------------------------------------------------------------
sim800.println("AT"); //Check GSM Module
delay(1000);
sim800.println("ATE1"); //Echo ON
delay(1000);
sim800.println("AT+CPIN?"); //Check SIM ready
delay(1000);
sim800.println("AT+CMGF=1"); //SMS text mode
delay(1000);
sim800.println("AT+CNMI=1,1,0,0,0"); /// Decides how newly arrived SMS should be handled
delay(1000);
//AT +CNMI = 2,1,0,0,0 - AT +CNMI = 2,2,0,0,0 (both are same)
//--------------------------------------------------------------
delay(20000);
buzzer_timer = millis();
}
/*****************************************************************************************
* loop() function
*****************************************************************************************/
void loop()
{
//--------------------------------------------------------------
getGps(latitude, longitude);
//--------------------------------------------------------------
float distance = getDistance(latitude, longitude, initialLatitude, initialLongitude);
//--------------------------------------------------------------
Serial.print("Latitude= "); Serial.println(latitude, 6);
Serial.print("Lngitude= "); Serial.println(longitude, 6);
Serial.print("initialLatitude= "); Serial.println(initialLatitude, 6);
Serial.print("initialLngitude= "); Serial.println(initialLongitude, 6);
Serial.print("current Distance= "); Serial.println(distance);
//--------------------------------------------------------------
// Set alarm on?
if(distance > maxDistance) {
//------------------------------------------
if(send_alert_once == true){
digitalWrite(BUZZER, HIGH);
sendAlert();
alarm = true;
send_alert_once = false;
buzzer_timer = millis();
}
//------------------------------------------
}
else{
send_alert_once = true;
}
//--------------------------------------------------------------
// Handle alarm
if (alarm == true) {
if (millis() - buzzer_timer > 5000) {
digitalWrite(BUZZER, LOW);
alarm = false;
buzzer_timer = 0;
}
}
//--------------------------------------------------------------
while(sim800.available()){
Serial.println(sim800.readString());
}
//--------------------------------------------------------------
while(Serial.available()) {
sim800.println(Serial.readString());
}
//--------------------------------------------------------------
}
/*****************************************************************************************
* getDistance() function
*****************************************************************************************/
// Calculate distance between two points
float getDistance(float flat1, float flon1, float flat2, float flon2) {
// Variables
float dist_calc=0;
float dist_calc2=0;
float diflat=0;
float diflon=0;
// Calculations
diflat = radians(flat2-flat1);
flat1 = radians(flat1);
flat2 = radians(flat2);
diflon = radians((flon2)-(flon1));
dist_calc = (sin(diflat/2.0)*sin(diflat/2.0));
dist_calc2 = cos(flat1);
dist_calc2*=cos(flat2);
dist_calc2*=sin(diflon/2.0);
dist_calc2*=sin(diflon/2.0);
dist_calc +=dist_calc2;
dist_calc=(2*atan2(sqrt(dist_calc),sqrt(1.0-dist_calc)));
dist_calc*=6371000.0; //Converting to meters
return dist_calc;
}
/*****************************************************************************************
* getGps() Function
*****************************************************************************************/
void getGps(float& latitude, float& longitude)
{
// Can take up to 60 seconds
boolean newData = false;
for (unsigned long start = millis(); millis() - start < 2000;){
while (neogps.available()){
if (gps.encode(neogps.read())){
newData = true;
break;
}
}
}
if (newData) //If newData is true
{
latitude = gps.location.lat();
longitude = gps.location.lng();
newData = false;
}
else {
Serial.println("No GPS data is available");
latitude = 0;
longitude = 0;
}
}
/*****************************************************************************************
* sendAlert() function
*****************************************************************************************/
void sendAlert()
{
//return;
String sms_data;
sms_data = "Alert! The object is outside the fense.\r";
sms_data += "http://maps.google.com/maps?q=loc:";
sms_data += String(latitude) + "," + String(longitude);
//return;
sim800.print("AT+CMGF=1\r");
delay(1000);
sim800.print("AT+CMGS=\""+PHONE+"\"\r");
delay(1000);
sim800.print(sms_data);
delay(100);
sim800.write(0x1A); //ascii code for ctrl-26 //sim800.println((char)26); //ascii code for ctrl-26
delay(1000);
Serial.println("SMS Sent Successfully.");
}
Please edit your post to add code tags. For instructions, see the "How to get the best out of this forum" post.
Please see it again
Please explain exactly what you mean by this
A schematic of your project, even a photo of a hand drawn circuit, would be helpful
To determine when the train enters into the area, you need a state machine. Study the Arduino State Machine example (for pressing a button) to learn how that works.
Files>Examples>02.Digital>StateChangeDetection
What is all the Sim800 stuff for in your code? It looks like you just copied something from the web, and have not changed anything at all, not even entered an initial latitude and longitude.
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