BME280

Library for reading a BME280 sensor on a Raspberry Pi.

Uses pi4j2 under the hood (https://github.com/Pi4J/pi4j-v2).

Prerequisites:

• Raspberry Pi
• BME280 sensor
• i2c enabled on Raspberry Pi (sudo raspi-config -> Interface Options -> I2C -> Yes)

This is very heavily based on this with the main change being an upgrade to pi4j2: https://github.com/ControlEverythingCommunity/BME280/blob/master/Java/BME280.java

Getting Started

1. Add the library as a dependency

   <dependency>
       <groupId>dev.rablet</groupId>
       <artifactId>bme280</artifactId>
       <version>0.0.2</version>
   </dependency>
   

2. Find the i2cAddress of your BME280 sensor (below shows an example for 0x76):

   $ i2cdetect -y 1
       0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
   00:                         -- -- -- -- -- -- -- --
   10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
   20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
   30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
   40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
   50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
   60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
   70: -- -- -- -- -- -- 76 --
   

3. Create a BME280 instance:

   BME280Client bme280 = new BME280Client("linuxfs-i2c", "BME280", 1, 0x76);
   

4. Read data from the sensor:

   BME280Data data = bme280.getBME280Data();
   

5. Do whatever you want to do with the data:

   System.out.println("Data  = " + data.toString());
   
   Sample output:
   
   Data  = { temperature='27.533137437939878 °', humidity='48.78065766673965%', pressure='1012.6340525430045 hPa'}