HTU21D+BMP180+ BH1750FVI Temperature Humidity Pressure Light Sensor

Description

Tutorial: How to Use HTU21D+BMP180+BH1750FVI

The HTU21D+BMP180+BH1750FVI sensor combines three functionalities: temperature measurement, humidity measurement, and atmospheric pressure measurement. This component is ideal for projects requiring precise weather data.

What you need

• Arduino Uno or compatible
• USB cable
• Arduino IDE software

Steps

1. Install the HTU21D, BMP180, and BH1750FVI chip drivers from the Adafruit repository (check the datasheet)
2. Connect the VCC and GND pins of the sensor to the corresponding Arduino power supply
3. Connect the sensor data interface (SCL, SDA) to the Arduino I2C pins

Example code

//Librerie necessarie
#include <Wire.h>
#include <Adafruit_HTU21D.h>
#include <Adafruit_BMP085_U.h>
#include <Adafruit_Sensor.h>
//Inizializzazione del sensore HTU21D
Adafruit_HTU21D htu = Adafruit_HTU21D();
//Inizializzazione del sensore BMP180
Adafruit_BMP085_Unified bmp = Adafruit_BMP085_Unified(Adafruit_BMP085_Unified::MODE_UNIFIED, 100);

Mini project

Create an environmental monitoring system that records and sends temperature, humidity, and atmospheric pressure data over the internet.

Common mistakes

• I cannot read the sensor values
• The sensor does not respond during I2C communication
• Insufficient power supply error

Recommended accessories

• ESP8266 WiFi Module
• 16×2 LCD Display
• Portable battery for Arduino

Frequently asked questions

How can I get data from the sensor?
Use the Adafruit HTU21D, BMP085 and BH1750FVI libraries to read the values.

Can I connect the sensor to a Raspberry Pi?
Yes, but you will need to install the specific libraries for Python or C++.