Sensor de Temperatura e humidade Si7021 (integrado)

 /*   
  * ==========================================================  
  * Artekit demo sketch for the AK-SI7021 Humidity/Temperature  
  * sensor breakout board.  
  *  
  * Copyright (c) 2014 Artekit Italy  
  * http://www.artekit.eu  
  *   
  * Product page:  
  * http://www.artekit.eu/products/sensors/ak-si7021/  
  *  
  * Connect the pins in the following way:  
  *  
  * Arduino UNO     AK-SI7021  
  * ==================================  
  *  AN5          SCL  
  *  AN4          SDA  
  *  3.3V         VCC  
  *  GND          GND  
  *  
  * You may need a level converter for the I2C lines, since  
  * the Arduino moves these lines from 0V to 5V, and the  
  * AK-SI7021 works only with 3.3V  
  *  
  * ==========================================================  
  */  
    
 #include <Wire.h>  
 #include <Artekit_SI7021.h>  
   
 Artekit_SI7021 si7021;  
   
 static void sensorRead()  
 {  
  float temperature;  
  float humidity;  
    
  /* Read relative humidity and temperature */  
  humidity = si7021.ReadHumidity();  
    
  /* By setting true in the next function, we read the  
   * temperature from the previous RH measurement.  
   * Otherwise it will perform a new temperature measurement.  
   */  
  temperature = si7021.ReadTemperature(true);  
    
  Serial.print("RH: ");  
  Serial.print(humidity);  
  Serial.print("%\tTemperature: ");  
  Serial.println(temperature);  
 }  
   
 void setup()  
 {  
  /* Start I2C */  
  Wire.begin();  
  /* Start serial */  
  Serial.begin(9600);  
 }  
   
 void loop()  
 {  
  static int counter = 0;  
  static bool heater = false;  
    
  /* Read sensor data each second */  
  sensorRead();  
     
  /* Turn on and off the heater every 30 seconds,  
   * just to see the change in the temperature readings.  
   */  
  if (heater == false)  
  {  
   counter++;  
   if (counter == 30)  
   {  
    Serial.println("Heater ON");  
    si7021.EnableHeater();  
    heater = true;   
   }  
  } else {  
   counter--;  
   if (counter == 0)  
   {  
    Serial.println("Heater OFF");  
    si7021.DisableHeater();  
    heater = false;  
   }    
  }  
    
  delay(1000);  
 }  

Marcadores: estação meteorológica, icstation, sensor arduino, sensor de humidade, sensor de temperatura, sensor de temperatura e humidade, si7021