📌Adding GPS Features

This code is sourced from another project.

Currently the GPS is only used for Date and Time retrieval.

gps.ino

#include <TinyGPSPlus.h>
#include <SoftwareSerial.h>
#include <ArduinoJson.h>

static const int RXPin = 4, TXPin = 3;
static const uint32_t GPSBaud = 9600;

const int sensorPin = 2;

TinyGPSPlus gps;

SoftwareSerial ss(RXPin, TXPin);

unsigned long lastDateSentTime = 0;
const unsigned long sendDateInterval = 7000;

unsigned long previousMillis = 0;

void setup() {
  pinMode(sensorPin, INPUT);

  Serial.begin(9600);
  ss.begin(GPSBaud);
}

void loop() {
  while (ss.available() > 0)
    gps.encode(ss.read());
  
  unsigned long currentTime = millis();

  if (currentTime - lastDateSentTime >= sendDateInterval) {
    sendTimeAndDate();
    lastDateSentTime = currentTime;
    return;
  }
}

void sendTimeAndDate() {
  if (!gps.time.isValid() || !gps.date.isValid())
    return;

  StaticJsonDocument<100> jsonDoc;

  JsonObject timeObject = jsonDoc.createNestedObject("time");
  timeObject["h"] = gps.time.hour();
  timeObject["m"] = gps.time.minute();
  timeObject["s"] = gps.time.second();

  JsonObject dateObject = jsonDoc.createNestedObject("date");
  dateObject["d"] = gps.date.day();
  dateObject["m"] = gps.date.month();
  dateObject["y"] = gps.date.year();

  String jsonString;
  serializeJson(jsonDoc, jsonString);
  Serial.println(jsonString);
}