DHT11 interfacing with NodeMCU

Below is the code for NodeMCU + DHT11. DHT11 is a temperature and humidity sensor.

#include <DHT.h>  

#define DHTPIN D1

#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);

void setup()

{

  Serial.begin(115200);

  dht.begin();

}

void loop()

{

  float h = dht.readHumidity();

                         

  float t = dht.readTemperature();      // Read temperature as Celsius (the default)

  if (isnan(h) || isnan(t))             // Check if any reads failed and exit early (to try again).

  {

    Serial.println("Failed to read from DHT sensor!");

    return;

  }

  Serial.print("Humidity: ");

  Serial.print(h);

  Serial.print(" %\t");

  Serial.print("Temperature: ");

  Serial.print(t);

  Serial.print(" *C ");

 

  delay(1000);

}

Explanation of the circuit and code in below video:

You can also download the code from the below repository:

https://github.com/embeddeddesignblog-way2know/nodemcu-way2know