Dht22

#include "DHT.h"

#define led 2 // GPIO2
int var = 0;

const int sleepTimeS = 1 * 60; // v minutách

#define DHTPIN 4 // DHT22 pin
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  dht.begin();
  pinMode(led, OUTPUT);
  digitalWrite(led, HIGH);

  Serial.begin(115200);

}

void loop() {
  Serial.println("Start");
  delay(2000);

  float hum = dht.readHumidity();
  float temp = dht.readTemperature();

  if (isnan(hum) || isnan(temp) ) {
    Serial.println("Chyba cteni dat z DHT !");
    delay(2000);

    float hum = dht.readHumidity();
    float temp = dht.readTemperature();
    if (isnan(hum) || isnan(temp) ) {

      while (var < 5) {
        digitalWrite(led, LOW);
        delay(500);
        digitalWrite(led, HIGH);
        delay(500);
        var++;
      }
    }
  }
  Serial.println();
  Serial.println("**********************************************");
  Serial.println("Humidity (%)\tTemperature (C)");
  Serial.print("\t");
  Serial.print(hum, 1);
  Serial.print("\t\t");
  Serial.print(temp, 1);
  Serial.println("\t\t");
  Serial.println("**********************************************");
  Serial.println();

  Serial.println("Jdu spat");
  delay(100);
  //  ESP.deepSleep(sleepTimeS * 1000000, WAKE_RF_DEFAULT);
  delay(100);


}