gps_first_sketch_backup.ino

#include <LiquidCrystal.h>
#include "TinyGPS++.h"
#include "SoftwareSerial.h"

// Define our Software Serial Connection With GPS - GPS RX is 8, TX is 9
SoftwareSerial serial_connection(8, 9); 
//This is the GPS object that allows us to read in data, measure, etc
TinyGPSPlus gps;
// LCD Pins conneted to arduino - RS is register select which lets us pick from two registers to write to, the 
  // one that allows us to position the cursor, or the one that allows us to write the message. 
  // En is enable which tells the
const int rs = 11, en = 12, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
// Initialize our lcd variable with the above values. Later we'll write like lcd.println etc
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

// Declare an array of mixed types of char(string) and double(number) - used when looping through comparing distances
struct Poi {
  char place_name[14];
  double lat;
  double lng;
};

// Declare variables to be output to our LCD
char first_name[14];
char second_name[14];
// Initialize distance variables with large numbers so that logic written below works and overwrites 
long first_distance = 100000;
long second_distance = 111111;

// Define our array of locations and names
Poi poi_list[37] = {
{"Target E.",32.965764,-96.6460794}
,
{"Target W.",32.9652453,-96.646699}
,
{"Office Depot",32.9648976,-96.6471899}
,
{"Michaels",32.9661522,-96.645606}
,
{"Petsmart",32.9663851,-96.6453928}
,
{"Cheddars",32.9662152,-96.6444272}
,
{"Chicfila W",32.9658597,-96.6440074}
,
{"Chicfila E",32.9658473,-96.6438411}
,
{"Walmart Garden",32.9633077,-96.642327}
,
{"Walmart Main",32.9629038,-96.642842}
,
{"Walmart Food",32.9624649,-96.6433865}
,
{"Academy",32.9592816,-96.6467446}
,
{"Excel North",32.9617054,-96.7066517}
,
{"Kroger North",32.977509,-96.6642554}
,
{"Kroger South",32.9770995,-96.6642755}
,
{"Texas Roadhouse",32.963124,-96.636627}
,
{"Fry's",33.0068033,-96.7045033}
,
{"Costco",33.0444814,-96.6997021}
,
{"Red Lobster",33.0444972,-96.7015958}
,
{"Movies AMC",32.9505165,-96.6139224}
,
{"B & N South",32.9532781,-96.613453}
,
{"B&N North",32.9537913,-96.6130802}
,
{"Macy's N",32.9524206,-96.6094002}
,
{"Macy's W",32.9523171,-96.6098562}
,
{"Macy's SW",32.9519119,-96.6097704}
,
{"Macy's SE",32.9516644,-96.6092205}
,
{"Macy's E",32.9517949,-96.6087833}
,
{"Old Navy",32.9524994,-96.6123775}
,
{"Panera W",32.9539106,-96.6168943}
,
{"Panera E",32.953861,-96.6167387}
,
{"In N' Out",32.9540388,-96.6174079}
,
{"E Home Depot",32.9462332,-96.6152769}
,
{"W Home Depot",32.946375,-96.6159314}
,
{"Best Buy",32.9456626,-96.6140002}
,
{"Bop Joa",32.9685094,-96.6048297}
,
{"Ranger Stadi",32.7502775,-97.0836282}
,
{"Madera",36.9613356,-120.0607176}
};
int number_of_points = 37;








// Takes that mixed array struct and calculates the distance to the given point from our location
float calculate_distance(Poi point){
  long distance = gps.distanceBetween(
    gps.location.lat(),
    gps.location.lng(),
    point.lat,
    point.lng);
    return distance;
}

// Takes first name and it's distance, second name and it's distance, and outputs to LCD
void output_to_lcd(char frst_name[30], long frst_distance,char scond_name[30],  long scond_distance){
  lcd.setCursor(0, 0);
  lcd.print(frst_name);
  lcd.setCursor(13, 0);
  lcd.print(frst_distance);
  lcd.setCursor(0, 1);
  lcd.print(scond_name);
  lcd.setCursor(13, 1);
  lcd.print(scond_distance);
}

// Our initial code that runs upon starting
void setup()
{
  Serial.begin(9600);//This opens up communications to the Serial monitor in the Arduino IDE
  serial_connection.begin(9600);//This opens up communications to the GPS
  lcd.begin(16, 2);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Parkometer 2000");
  lcd.setCursor(0, 1);
  lcd.print("LOOKING 4 SAT...");
  lcd.clear();
}

// Main function, checks our current position, iterates through points list measuring distance each time,
  // replaces first or second place with appropriate name, outputs to LCD
void loop()
{ 
  while(serial_connection.available())
  {
    gps.encode(serial_connection.read());
  }
  if(gps.location.isUpdated()){
  
    for(int i=0;i<number_of_points;i++){
        // compare first position name with current position being iterated name,
          // Used later to prevent first position from taking up first and second position
        bool same_name = strcmp(first_name, poi_list[i].place_name) ;
        long distance = calculate_distance(poi_list[i]);
        if(distance < first_distance){
          strcpy(first_name, poi_list[i].place_name);
          first_distance = distance;
        } if (distance < second_distance && distance > first_distance && same_name){
          strcpy(second_name, poi_list[i].place_name);
          second_distance = distance;
        }
        output_to_lcd(first_name, first_distance, second_name, second_distance);
    }
  }
}