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| // Library Required on top of the Arduino environment. Those Library are the property of their respective owners
// SimpleBouton Library : http://forum.arduino.cc/index.php?topic=375232.0
// TinyGPS++ library : https://github.com/mikalhart/TinyGPSPlus
/*
--------------------------------------------------------------
KEEP THIS INFORMATION IF YOU USE THIS CODE
Copyright (c) 2021 Jay For the Developpez.com forum
https://www.developpez.net/forums/d2100922/general-developpement/programmation-systeme/embarque/arduino/projet-arduino-gps-neo-7m/
Licenses for libraires included in this program apply
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
--------------------------------------------------------------
*/
// ======== CONFIGURATION DU HARDWARE ============
// if you use an Arduino with only one Serial port, uncomment this line
#define USE_SW_SERIAL
#ifdef USE_SW_SERIAL
#include <SoftwareSerial.h>
const uint8_t RXPin = 2; // the arduino pin on which to receive serial data from your GPS
const uint8_t TXPin = 3; // the arduino pin on which to transmit serial data to your GPS
SoftwareSerial gpsSerial(RXPin, TXPin);
#else
#define gpsSerial Serial1 // otherwise define here which Hardware Serial Port to use
#endif
// define your GPS baud rate (9600 is the default for GPS Neo 7M)
const uint32_t GPSBaud = 9600;
// the pins to set the alert distance 20 + 6 x bitMask (bitMask from LSB to MSB).
// eg if dip config is 1001 that's 9 in decimal, distance will be 20 + 9x6 = 74m.
// min distance = 20m, max distance with bitMaks @1111 = 100m
const uint8_t dipSwitchPins[] = {4, 5, 6, 7};
const uint8_t nbDipSwitches = sizeof dipSwitchPins / sizeof dipSwitchPins[0];
// button to record position, wired as : pin---BP---GND
const uint8_t recordPositionPin = 8;
// the pin triggering the alert. HIGH by default, turns LOW when distance is above threshold
const uint8_t alertPin = 9;
// the pin for the sound (a simple piezo) pin --- (piezo +) [piezo] (piezo -) ---- GND
const uint8_t piezoPin = 10;
// --------------------------------------------------------------
#include <simpleBouton.h>
simpleBouton boutonPosition(recordPositionPin);
#include <TinyGPS++.h>
TinyGPSPlus gps;
double recordedLatitude;
double recordedLongitude;
bool recordedPosition = false;
double HaversineDistance(const double lat1, const double long1, const double lat2, const double long2)
{
double latRad1 = radians(lat1);
double latRad2 = radians(lat2);
double lonRad1 = radians(long1);
double lonRad2 = radians(long2);
double half_diffLa = (latRad2 - latRad1) / 2.0;
double s_half_diffLa = sin(half_diffLa);
double half_doffLo = (lonRad2 - lonRad1) / 2.0;
double s_half_doffLo = sin(half_doffLo);
double computation = asin(sqrt(s_half_diffLa * s_half_diffLa + cos(latRad1) * cos(latRad2) * s_half_doffLo * s_half_doffLo));
return 2.0 * 6372795.0 * computation;
}
bool feedGPS()
{
bool gotFix = false;
while (gpsSerial.available() > 0)
if (gps.encode(gpsSerial.read())) {
gotFix = true;
break;
}
return gotFix;
}
uint32_t maxDistance()
{
uint8_t dipSwitchByte = 0;
for (uint8_t i = 0; i < nbDipSwitches; i++)
if (digitalRead(dipSwitchPins[i]) == LOW) bitSet(dipSwitchByte, i);
return 20ul + 6 * dipSwitchByte; // dipSwitchByte between 0 and 15 => distance between 20+0=20 and 20+6*15=100
}
void checkUserAction()
{
static bool recordingAttempt = false;
uint32_t duree = boutonPosition.dureeEnfonce();
boutonPosition.actualiser();
if (boutonPosition.vientDEtreEnfonce()) recordingAttempt = true;
if (recordingAttempt && (boutonPosition.vientDEtreRelache() || (duree > 2000))) {
if (gps.location.isValid()) {
recordedLatitude = gps.location.lat();
recordedLongitude = gps.location.lng();
recordedPosition = true;
recordingAttempt = false;
Serial.print(F("Recorded Position = "));
Serial.print(recordedLatitude, 6); Serial.write(','); Serial.println(recordedLongitude, 6);
tone(piezoPin, 1000, 200);
} else {
Serial.println(F("Can't record position, no valid fix"));
}
}
}
void checkPosition()
{
static bool alert = false;
if (gps.location.isValid()) {
Serial.print(F("Position: ")); Serial.print(gps.location.lat());
Serial.write(','); Serial.println(gps.location.lng());
if (recordedPosition) {
double distance = HaversineDistance(gps.location.lat(), gps.location.lng(), recordedLatitude, recordedLongitude);
Serial.print(F("Distance from position: ")); Serial.print(distance); Serial.println(F(" m"));
if (distance >= maxDistance()) {
if (!alert) {
digitalWrite(alertPin, LOW);
alert = true;
tone(piezoPin, 600, 100);
delay(120);
tone(piezoPin, 300, 100);
Serial.print(F("alert distance = ")); Serial.println(distance);
}
} else {
if (alert) {
digitalWrite(alertPin, HIGH);
tone(piezoPin, 300, 100);
delay(120);
tone(piezoPin, 600, 100);
Serial.print(F("Distance back in range : ")); Serial.println(distance);
}
alert = false;
}
}
}
}
void setup() {
for (auto& p : dipSwitchPins) pinMode(p, INPUT_PULLUP);
pinMode(alertPin, OUTPUT);
pinMode(piezoPin, OUTPUT);
digitalWrite(alertPin, HIGH); // will go low in case of Alert
Serial.begin(115200);
gpsSerial.begin(GPSBaud);
}
void loop() {
checkUserAction();
if (feedGPS()) checkPosition();
} |
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