Other Arduino Codes and Videos by Robojax

How use HTU21DF Humidity and Temperature Sensor with Arduino (Basic Code)

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HTU21DF Humidity and Temperature Sensor with Arduino (Basic Code)

This is basic code to measure temperature and himidity usiung HTUD21DF sensor. Full hardware, two types of code and demonstation is shonw in the video. The code is available below this video. To see custom code shown in video click Here.

Topics Covered in this tutorial

• 00:00 Introduction
• 01:45 Hardware explaine
• 03:45 Wiring explained 04:33 Code Explained (basic code)
• 09:04 Demonstration of basic code
• 10:04 Custom Code explained
• 13:04 Demonstration of custom code

Related HTU21DF Videos

Resources for this sketch

• HTU21DF Datasheet (PDF)
• Adafruit HTU21DF Library (getHub)
• Adafruit HTU21DF Library (Robojax.com)
• Difference between HTU21DF and HTU21D

 /***************************************************
  This is an example for the HTU21D-F Humidity & Temp Sensor

  Designed specifically to work with the HTU21D-F sensor from Adafruit
  ----> https://www.adafruit.com/products/1899

  These displays use I2C to communicate, 2 pins are required to
  interface
 ****************************************************/

#include <Wire.h>
#include "Adafruit_HTU21DF.h"

// Connect Vin to 3-5VDC
// Connect GND to ground
// Connect SCL to I2C clock pin (A5 on UNO)
// Connect SDA to I2C data pin (A4 on UNO)

Adafruit_HTU21DF htu = Adafruit_HTU21DF();

void setup() {
  Serial.begin(9600);
  Serial.println("HTU21D-F test");

  if (!htu.begin()) {
    Serial.println("Couldn't find sensor!");
    while (1);
  }
}

void loop() {
    float temp = htu.readTemperature();
    float rel_hum = htu.readHumidity();
    Serial.print("Temp: "); Serial.print(temp); Serial.print(" C");
    Serial.print("		");
    Serial.print("Humidity: "); Serial.print(rel_hum); Serial.println(" \%");
    delay(500);
}   

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