#include <LiquidCrystal_I2C.h>
#include <Wire.h>

#include <DHT.h>
#define dhtpin 23
#define dhttype DHT22
DHT dht(dhtpin, dhttype);

#define pot 15
LiquidCrystal_I2C lcd(0x27, 16, 2);

#define sw 12
bool swState;
bool lastswState = HIGH;
bool state = LOW;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  pinMode(sw, INPUT);
  dht.begin();
}
void loop() {
  /////////// LCD ///////////
  /*int val = analogRead(pot);
  int po = map(val, 0, 4095, 0, 100);
  
  lcd.setCursor(0, 0);
  lcd.print("Value Pot: ");
  lcd.print( po);

  int reading = digitalRead(sw);  
  if (reading != lastswState) {  
    lastDebounceTime = millis();    
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    if (reading != swState) {   
      swState = reading;        
      if (swState == LOW) {
        state = !state ;
       }
      }
    }
  lastswState = reading;

  // ใช้อันนี้ก็ได้
  lcd.setCursor(6, 1);
  lcd.print(state ? "ON " : "OFF"); */

  // ใช้อันนี้ก็ได้
  // if (state == LOW){             
  //   lcd.setCursor(0,1);     
  //   lcd.print("OFF");
  // }
  // else{
  //   lcd.setCursor(0,1);     
  //   lcd.print(" ON");
  // }

  /////////// DHT ///////////
  float humi = dht.readHumidity(); // ดึงค่าความชื้น
  float temp = dht.readTemperature(); // ดึงค่าอุณหภูมิ

  if (isnan(humi) || isnan(temp)) {
    Serial.println("Failed to read from DHT sensor");
    return;
  }
  Serial.print("Humi : ");
  Serial.print(humi);
  Serial.print("Humi : ");
  Serial.print("\t");
  Serial.print("Temp : ");
  Serial.println(temp);
  delay(500);

  lcd.setCursor(0,0);  
  lcd.print("Humi : ");
  lcd.print(humi);
  lcd.print(" %");
  lcd.setCursor(0,1);  
  lcd.print("Temp : ");
  lcd.print(temp);
  lcd.print(" °C");
}