Hello everyone,
despite searching the whole internet for days I wasn't able to get what I want.
simply my project is to create a home quarantine device. I am almost done with it , I have got the desired location outputs and I was able to store it in the database.
it is just this last part that it troubled me the most and I am not able to do it, which is Geofencing . Basically what I want is if the quarantined person leaves his area it would send an SMS messages that notifies me that the person left the designed boundaries.
if someone could help me please. I'd be forever grateful
the components I am using are
1 Arduino uno
2 SIM 800L
3 NEO-6M GPS
The code I am using
#include <TinyGPS++.h>
#include <SoftwareSerial.h>
#include <AltSoftSerial.h>
#define rxPin 2
#define txPin 3
SoftwareSerial sim800L(rxPin,txPin);
SoftwareSerial GPRS(2, 3);
boolean state, lastState;
//GPS Module RX pin to Arduino 9
//GPS Module TX pin to Arduino 8
AltSoftSerial neogps;
TinyGPSPlus gps;
unsigned long previousMillis = 0;
long interval = 60000;
void setup()
{
//Start of Alret sms message
pinMode(4, INPUT_PULLUP);
state = digitalRead(4);
lastState = state;
GPRS.begin(9600);
Serial.begin(9600);
GPRS.println("AT+CMGF=1");
delay(1000);
// end of Alret sms message
//Begin serial communication with Arduino and Arduino IDE (Serial Monitor)
Serial.begin(9600);
//Begin serial communication with Arduino and SIM800L
sim800L.begin(9600);
//Begin serial communication with Arduino and SIM800L
neogps.begin(9600);
Serial.println("Initializing...");
//delay(10000);
//Once the handshake test is successful, it will back to OK
sendATcommand("AT", "OK", 2000);
sendATcommand("AT+CMGF=1", "OK", 2000);
//sim800L.print("AT+CMGR=40\r");
}
void loop()
{
state = lastState;
lastState = digitalRead(4);
if ( state != lastState ) {
sendSMS();
}
delay(500);
while(sim800L.available()){
Serial.println(sim800L.readString());
}
while(Serial.available()) {
sim800L.println(Serial.readString());
}
unsigned long currentMillis = millis();
if(currentMillis - previousMillis > interval) {
previousMillis = currentMillis;
sendGpsToServer();
}
}
void sendSMS() {
Serial.print("wire was cut ");
Serial.println(state ? "on" : "off");
GPRS.println("AT+CMGS=\"+05488345708\"");
delay(500);
GPRS.print("wire was plugged ");
GPRS.println(state ? "on" : "off");
GPRS.write( 0x1a ); // ctrl+Z character
delay(500);
}
int sendGpsToServer()
{
//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 is true
if(true){
newData = false;
String latitude, longitude;
float altitude;
unsigned long date, time, speed, satellites;
latitude = String(gps.location.lat(), 6); // Latitude in degrees (double)
longitude = String(gps.location.lng(), 6); // Longitude in degrees (double)
altitude = gps.altitude.meters(); // Altitude in meters (double)
date = gps.date.value(); // Raw date in DDMMYY format (u32)
time = gps.time.value(); // Raw time in HHMMSSCC format (u32)
Serial.print("Latitude= ");
Serial.print(latitude);
Serial.print(" Longitude= ");
Serial.println(longitude);
//if (latitude == 0) {return 0;}
String url, temp;
url = "http://cmpe2finalproject.000webhostapp.com/gpsdata.php?lat=";
url += latitude;
url += "&lng=";
url += longitude;
Serial.println(url);
delay(300);
sendATcommand("AT+CFUN=1", "OK", 2000);
//AT+CGATT = 1 Connect modem is attached to GPRS to a network. AT+CGATT = 0, modem is not attached to GPRS to a network
sendATcommand("AT+CGATT=1", "OK", 2000);
//Connection type: GPRS - bearer profile 1
sendATcommand("AT+SAPBR=3,1,\"Contype\",\"GPRS\"", "OK", 2000);
//sets the APN settings for your network provider.
sendATcommand("AT+SAPBR=3,1,\"APN\",\"internet\"", "OK", 2000);
//enable the GPRS - enable bearer 1
sendATcommand("AT+SAPBR=1,1", "OK", 2000);
//Init HTTP service
sendATcommand("AT+HTTPINIT", "OK", 2000);
sendATcommand("AT+HTTPPARA=\"CID\",1", "OK", 1000);
//Set the HTTP URL sim800.print("AT+HTTPPARA="URL","http://cmpe2finalproject.000webhostapp.com/gpsdata.php?lat=";
sim800L.print("AT+HTTPPARA=\"URL\",\"");
sim800L.print(url);
sendATcommand("\"", "OK", 1000);
//Set up the HTTP action
sendATcommand("AT+HTTPACTION=0", "0,200", 1000);
//Terminate the HTTP service
sendATcommand("AT+HTTPTERM", "OK", 1000);
//shuts down the GPRS connection. This returns "SHUT OK".
sendATcommand("AT+CIPSHUT", "SHUT OK", 1000);
}
return 1;
}
int8_t sendATcommand(char* ATcommand, char* expected_answer, unsigned int timeout){
uint8_t x=0, answer=0;
char response[100];
unsigned long previous;
//Initialice the string
memset(response, '\0', 100);
delay(100);
//Clean the input buffer
while( sim800L.available() > 0) sim800L.read();
if (ATcommand[0] != '\0'){
//Send the AT command
sim800L.println(ATcommand);
}
x = 0;
previous = millis();
//this loop waits for the answer with time out
do{
//if there are data in the UART input buffer, reads it and checks for the asnwer
if(sim800L.available() != 0){
response[x] = sim800L.read();
//Serial.print(response[x]);
x++;
// check if the desired answer (OK) is in the response of the module
if(strstr(response, expected_answer) != NULL){
answer = 1;
}
}
}while((answer == 0) && ((millis() - previous) < timeout));
Serial.println(response);
return answer;
}
