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

#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht (DHTPIN, DHTTYPE);
#define RELAY1 18
#define RELAY2 5
#define BUTTON1_PIN 26
#define BUTTON2_PIN 27

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

int state1 = 0, state2 =0;
int button_state1;
int button_state2;

int last_button_state1;
int last_button_state2;
int relay_state1 = LOW;  // the current state of relay

void setup() {
  Serial.begin(115200);
  dht.begin();
  LCD.init();
  LCD.backlight();
  pinMode (RELAY1,OUTPUT);
  pinMode (RELAY2,OUTPUT);
  pinMode(BUTTON1_PIN, INPUT_PULLUP);  
  pinMode(BUTTON2_PIN, INPUT_PULLUP);  
  button_state1 = digitalRead(BUTTON1_PIN);
  button_state2 = digitalRead(BUTTON2_PIN);


   
}
void btn() {
  last_button_state1 = button_state1;      // save the last state
  button_state1 = digitalRead(BUTTON1_PIN);   // read new state

  if (last_button_state1 == HIGH && button_state1 == LOW) {
    Serial.println("The button is pressed");

    // toggle state of relay
    relay_state1 = !relay_state1;

    // control relay arccoding to the toggled state
    digitalWrite(RELAY1, relay_state1);
  }
}
void relay_state()
{
  if(state1 ==1 )
  {
    digitalWrite(RELAY1, HIGH);
    LCD.setCursor(8, 0);
    LCD.println("DC1 ON");
  }
  else
  {
    digitalWrite(RELAY1, LOW);
    LCD.setCursor(8, 0);
    LCD.println("DC1 OFF");
  }
  if(state2 ==1 )
  {
    digitalWrite(RELAY1, HIGH);
    LCD.setCursor(0, 1);
    LCD.println("DC2 ON");
  }
  else
  {
    digitalWrite(RELAY1, LOW);
    LCD.setCursor(0, 1);
    LCD.println("DC2 OFF");
  }
}
void cbdht()
{
  float t = dht.readTemperature(); 
  float h = dht.readHumidity(); 
  if(t < 32)
  {
    state1 = 1;
  }
  else{
    state1 =2;
  }
}

void loop() {
  cbdht();
  relay_state();
  btn();
  delay(200);
}