#include "DHT.h"
#include <LiquidCrystal_I2C.h>

#define I2C_ADDR 0x27
#define LCD_COLUMNS 20
#define LCD_LINES 4
#define DHTPIN 12
#define soil 35
#define DHTTYPE DHT22
#define fan 27
#define pump 14
#define led 26
#define ldr 34
#define foy 26

int val;
DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(I2C_ADDR,LCD_COLUMNS,LCD_LINES );

const float GAMMA = 0.7;
const float RL10 = 50;

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  pinMode(ldr, INPUT);
  pinMode(soil, INPUT);
  pinMode(fan, OUTPUT);
  pinMode(pump, OUTPUT);
  pinMode(foy, OUTPUT);
  dht.begin();
  lcd.begin(20, 4);
}

void loop() {
  val = analogRead(soil);
  int Mois = map(val,0,4095,0,100);

  int analogValue = analogRead(34);
  float voltage = analogValue / 4095. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  float h = dht.readHumidity();
  float t = dht.readTemperature();
  float f = dht.readTemperature(true);

  lcd.setCursor(0, 0);
  lcd.print("HUM: ");
  lcd.print(h);

  lcd.setCursor(0, 1);
  lcd.print("TEMP: ");
  lcd.print(t);

  lcd.setCursor(0, 2);
  lcd.print("LIGHT: ");
  lcd.print(lux);

  lcd.setCursor(0, 3);
  lcd.print("SOIL: ");
  lcd.print(val);

  if(h >= 50|| t>= 40){
    digitalWrite(fan, HIGH);
  }
  else{
    digitalWrite(fan, LOW);
  }


  if(Mois <=50){
    digitalWrite(pump, HIGH);
  }
  else{
    digitalWrite(pump, LOW);
  }


if(val >= 2000){
    digitalWrite(led, HIGH);
  }
  else{
    digitalWrite(led, LOW);
  }
  if(lux < 2000){
    digitalWrite(foy, HIGH);
  }
  else{
    digitalWrite(foy, LOW);
  }


  }