#include <DHT.h>
#define DHTPIN 2
#define DHTTYPE DHT22

int led=7;

DHT dht(DHTPIN,DHTTYPE);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  Serial.println("dht22 reading ....");
  pinMode(led,OUTPUT);
  dht.begin();
}

void loop() {
  // put your main code here, to run repeatedly:
  // this speeds up the simulation
  delay(200);
  float humidity=dht.readHumidity();
  float temperature=dht.readTemperature();

  if(isnan(humidity)||isnan(temperature)){
    Serial.println("failed to read from sensor");
    return;
  }
  Serial.print("humidity:");
  Serial.println(humidity);
  Serial.println("%");
  digitalWrite(led,HIGH);
  Serial.println("temperature:");
  Serial.println(temperature);
  Serial.println("'C");
}