// Learn about the ESP32 WiFi simulation in
// https://docs.wokwi.com/guides/esp32-wifi

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

const int DHT_PIN = 15;
#define LED 2
#define LED2 4
#define SOUND_SPEED 0.034
const int trigPin = 5;
const int echoPin = 18;

long duration;
float distanceCm;

DHTesp dhtSensor;

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

void setup() {
  Serial.begin(115200);
  pinMode(LED, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Loadding...");
}

void loop() {

  LCD.clear();
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  LCD.setCursor(0, 0);
  LCD.print("Nhiet Do: " + String(data.temperature, 1));
  LCD.setCursor(0, 1);
  LCD.print("Do Am: " + String(data.humidity, 2));
  if (data.temperature >= 35) {
    digitalWrite(LED, LOW);
  } else {
    digitalWrite(LED, HIGH);
  }

  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distanceCm = duration * SOUND_SPEED/2;
  if (distanceCm >= 100) {
    digitalWrite(LED2, HIGH);
  } else {
    digitalWrite(LED2, LOW);
  }
  delay(1000);
}