DHT11 or DHT 11 or DHT-11 temperature and humidity sensor is a digital temperature and humidity sensor. This DHT11 Digital Relative Humidity & Temperature Sensor Module is pre-calibrated with resistive sense technology coupled with NTC thermistor, for the precise reading of the relative Humidity and surrounding temperature DHT 11 break-out board is a very popular, low-cost sensor from Aosong, the breakout provides easy installation of the DHT11 sensor module.

Applications:

HVAC, Testing and inspection equipment, Automotive, Datalogger, Consumer goods, Automatic control, Weather station, Home appliances, Humidity regulator, Medical, Dehumidifier, etc.

Features Of DHT11:

1. Low power consumption.
2. DHT11 sensor adopts
3. The module can detect the surrounding environment of the humidity and temperature
4. High reliability and excellent long-term stability
5. The output from the digital output
6. Has a fixed bolt hole and easy installation

Specifications Of DHT11 Sensor:

1. Humidity Measuring Range(%): 20 to 90
2. Temperature Measuring Range(°C): 0 to +50
3. Humidity Measurement Accuracy(%): Â±5.0
4. Temperature Measurement Accuracy(°C): Â±2.0
5. Response Time(s): <5
6. Supply Voltage (V): 5
7. Breadboard Size(mm): 19×17 (LxW)
8. Weight (gm): 0.6

#include "DHT.h"

#define DHTPIN 2     // Digital pin connected to the S pin
#define DHTTYPE DHT11   // DHT 11

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
}

void loop() {
  // Wait 2 seconds between measurements
  delay(2000);

  float h = dht.readHumidity();
  float t = dht.readTemperature(); // Celsius

  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print("%  ");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.println("°C");
}