#include "DHT.h"
#define DHTPIN 14
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

const int buttonPin = 34;
const int ledPin = 23;

int ledState = LOW;
int buttonState;
int lastButtonState = LOW;

unsigned long lastDebounceTime = 0;
unsigned long debounceTimeDelay = 50;

void setup() {
  pinMode(buttonPin, INPUT);
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, ledState);
  dht.begin();
  Serial.begin(115200); 
}

void loop() {
  int reading = digitalRead(buttonPin);

  if (reading != lastButtonState) {
    lastDebounceTime = millis();
  }

  if ((millis() - lastDebounceTime) > debounceTimeDelay) {
    if (reading != buttonState) {
      buttonState = reading;

      if (buttonState == HIGH) {
        float t = dht.readTemperature();

        if (isnan(t)) {
          Serial.println(F("Failed to read from DHT sensor!"));
          return;
        }

        digitalWrite(ledPin, ledState);
        Serial.println("Date log");
        Serial.print(" nhiet do: ");
        Serial.print(t);
        Serial.println("C");

        if (t > 25) {
          digitalWrite(ledPin, HIGH);
          Serial.println(" Nhiet do tren 30");
          Serial.println(" Sang Led ");
        } else {
          digitalWrite(ledPin, LOW);
          Serial.println(" Nhiet do duoi 30");
          Serial.println(" Tat Led ");
        }
      }
    }
  }

  lastButtonState = reading;
}