#include "DHTesp.h"
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define BUZZER_PIN       18
int glo = LED_BUILTIN;
const int DHT_PIN = 15;

DHTesp dhtSensor;
#define SCREEN_WIDTH 128 
#define SCREEN_HEIGHT 64


#define OLED_RESET     -1 
#define SCREEN_ADDRESS 0x3C
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup() {
  Serial.begin(115200);
  pinMode(BUZZER_PIN, OUTPUT);
    pinMode(glo, OUTPUT);
    if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
	Serial.println(F("SSD1306 allocation failed"));
	for(;;);
}

display.clearDisplay();

 
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

void loop() {
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("---");
  delay(1000);

   if (data.humidity < 30) 
   {
    Serial.println("alert low humidity");;
    digitalWrite(BUZZER_PIN, HIGH);
     digitalWrite(glo, HIGH);
   

  }
   else
    {
    Serial.println("humidity is normal");
    digitalWrite(BUZZER_PIN, LOW);
    digitalWrite(glo, LOW);

   
  }
  display.clearDisplay();
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.println(data.temperature);
display.display();
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,28);
display.println(data.humidity);
display.display();

}