#include "DHT.h"
#include <TinyGPSPlus.h>
#include <SoftwareSerial.h>

#define redLed          10
#define yellowLED       9
#define greenLED        8
#define WaterLevelLow   A0
#define WaterLevelMed   A1
#define WaterLevelHigh  A2
#define DHTPIN          2
#define GPSrxPin        3
#define GPStxPin        4
#define rxPin           5
#define txPin           6

#define DHTTYPE DHT11

SoftwareSerial ss(rxPin, txPin);
SoftwareSerial ssGPS(GPSrxPin, GPStxPin);
TinyGPSPlus gps;
DHT dht(DHTPIN, DHTTYPE);

float h = 0;
float t = 0;
int waterlevelvalue = 135;//ESP32 Main Project Power
float var1;
float var2;
int var3;
String var4;
String var5;

int var6;
int var7;
int var8;

int waterLevel = 0;
int WaterLevelLowValue = 0;
int WaterLevelMedValue = 0;
int WaterLevelHighValue = 0;
unsigned long currentTime;
unsigned long lastTime;
char   google_maps_link[70];
String google_maps_link_string = "";
String Longitude = "1";
String Latitude = "1";


void setup() {

  pinMode(redLed, OUTPUT);
  pinMode(yellowLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(WaterLevelLow, INPUT);
  pinMode(WaterLevelMed, INPUT);
  pinMode(WaterLevelHigh, INPUT);
  digitalWrite(redLed, HIGH);
  digitalWrite(yellowLED, LOW);
  digitalWrite(greenLED, LOW);
  Serial.begin(9600);
  ss.begin(9600);
  ssGPS.begin(9600);
  dht.begin();
  currentTime = millis();
  lastTime = currentTime;
}

void loop () {
  read_GPS_receiver();
  h = dht.readHumidity();
  t = dht.readTemperature();
  WaterLevelLowValue = analogRead(WaterLevelLow);
  WaterLevelMedValue = analogRead(WaterLevelMed);
  WaterLevelHighValue = analogRead(WaterLevelHigh);
  if (WaterLevelLowValue < waterlevelvalue && WaterLevelMedValue < waterlevelvalue && WaterLevelHighValue < waterlevelvalue) {
    waterLevel = 0;//tank is @  0% Empty
    digitalWrite(redLed, LOW);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, HIGH);
  }
  else if (WaterLevelLowValue > waterlevelvalue && WaterLevelMedValue < waterlevelvalue && WaterLevelHighValue < waterlevelvalue) {
    waterLevel = 30;//tank is @  30%
    digitalWrite(redLed, LOW);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, HIGH);
  }
  else if (WaterLevelLowValue > waterlevelvalue && WaterLevelMedValue > waterlevelvalue && WaterLevelHighValue < waterlevelvalue) {
    waterLevel = 60;//tank is @  60%
    digitalWrite(redLed, LOW);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, LOW);
  }
  else if (WaterLevelLowValue > waterlevelvalue && WaterLevelMedValue > waterlevelvalue && WaterLevelHighValue > waterlevelvalue) {
    waterLevel = 100;//tank is @ 100% Full
    digitalWrite(redLed, HIGH);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, LOW);
  }
  currentTime = millis();
  // Every second, calculate and print L/Min
  if (currentTime >= (lastTime + 1000))
  {
    lastTime = currentTime;
    Serial.println("______________________");
    Serial.print(F("Humidity: "));
    Serial.print(h);
    Serial.println(F("%"));
    Serial.print(F("Temperature: "));
    Serial.print(t);
    Serial.println(F("°C "));
    Serial.println("______________________");
    Serial.print("Water Level: ");
    Serial.println(waterLevel);
    Serial.println("______________________");
    Serial.print("LowValue: ");
    Serial.println(WaterLevelLowValue);
    Serial.print("MedValue: ");
    Serial.println(WaterLevelMedValue);
    Serial.print("HighValue: ");
    Serial.println(WaterLevelHighValue);
    var1 = t;
    var2 = h;
    var3 = waterLevel;
    var4 = Latitude;
    var5 = Longitude;

    var6=WaterLevelLowValue;
    var7=WaterLevelMedValue;
    var8=WaterLevelHighValue;

    ss.print(var1, 2);
    ss.print("A");
    ss.print(var2);
    ss.print("B");
    ss.print(var3);
    ss.print("C");
    ss.print(var4);
    ss.print("D");
    ss.print(var5);
    ss.print("E");

    ss.print(var6);
    ss.print("F");
    ss.print(var7);
    ss.print("G");
    ss.print(var8);
    ss.print("H");

    ss.print("\n");
  }
}

void read_GPS_receiver() {
  while (ssGPS.available() > 0) {
    if (gps.encode(ssGPS.read())) {
      if (gps.location.isValid()) {
        Latitude  = String(gps.location.lat(), 6);
        Longitude = String(gps.location.lng(), 6);
        Serial.print(Latitude);
        Serial.print(",");
        Serial.print(Longitude);
        Serial.println();
        Serial.println("______________________");
        google_maps_link_string = "http://maps.google.com/maps?&z=15&mrt=yp&t=k&q=" + Latitude + "+" + Longitude;
        google_maps_link_string.toCharArray(google_maps_link, 70);
      }
      else  {
        //Serial.println(F("INVALID"));
        Latitude  ="1.23";
        Longitude ="1.23";
      }
    }
  }
  if (millis() > 5000 && gps.charsProcessed() < 10) {
    Serial.println(F("No GPS detected: check wiring."));
    while (true);
  }
}