dht12.ino

// Do not remove the include below
#include "Arduino.h"
#include <DHT12.h>
// Set dht12 i2c comunication on default Wire pin
DHT12 dht12;

void setup()
{
  Serial.begin(112560);
  // Start sensor handshake
  dht12.begin();
}
int timeSinceLastRead = 0;

void loop()
{
  // Report every 2 seconds.
  if(timeSinceLastRead > 2000) {
  // Reading temperature or humidity takes about 250 milliseconds!
    // Read temperature as Celsius (the default)
    float t12 = dht12.readTemperature();
    // Read temperature as Fahrenheit (isFahrenheit = true)
    float f12 = dht12.readTemperature(true);
    // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
    float h12 = dht12.readHumidity();
    bool dht12Read = true;
    // Check if any reads failed and exit early (to try again).
    if (isnan(h12) || isnan(t12) || isnan(f12)) {
      Serial.println("Failed to read from DHT12 sensor!");
      dht12Read = false;
    }
    if (dht12Read){
      // Compute heat index in Fahrenheit (the default)
      float hif12 = dht12.computeHeatIndex(f12, h12);
      // Compute heat index in Celsius (isFahreheit = false)
      float hic12 = dht12.computeHeatIndex(t12, h12, false);
      // Compute dew point in Fahrenheit (the default)
      float dpf12 = dht12.dewPoint(f12, h12);
      // Compute dew point in Celsius (isFahreheit = false)
      float dpc12 = dht12.dewPoint(t12, h12, false);

      Serial.print("DHT12=> Humidity: ");
      Serial.print(h12);
      Serial.print(" %\t");
      Serial.print("Temperature: ");
      Serial.print(t12);
      Serial.print(" *C ");
      Serial.print(f12);
      Serial.print(" *F\t");
      Serial.print("  Heat index: ");
      Serial.print(hic12);
      Serial.print(" *C ");
      Serial.print(hif12);
      Serial.print(" *F");
      Serial.print("  Dew point: ");
      Serial.print(dpc12);
      Serial.print(" *C ");
      Serial.print(dpf12);
      Serial.println(" *F");
    }
    timeSinceLastRead = 0;
  }
  delay(100);
  timeSinceLastRead += 100;
}
// ที่มา https://github.com/xreef/DHT12_sensor_library