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pimatic-i2c-bme280 by Marcus Wittig | github | npm

pimatic-bme280

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A pimatic plugin for modules based on the BME280 sensor. It uses the node-bme280 driver from CLCL/node-BME280. This is a fork of Alan Tusk's plugin project which apparently is no longer maintained.

Configuring device

Add a device via the web UI or by editing the config file.

    {
      "class": "BME280Sensor"
      "id": "bme280-test",
      "name": "BME280 test",
      "device": "i2c-1",
      "address": "0x76",
      "interval": 10000,
      "xLink": "",
    }

Check using dir /dev/i2c* to see the name of your device. USe i2cdetect to determine the address. If you can't find this command use sudo apt-get install -y i2c-tools.

pi@raspberrypi:~/$ 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 --

Raspberry Pi setup

Copied steps from here: https://learn.sparkfun.com/tutorials/raspberry-pi-spi-and-i2c-tutorial#i2c-on-pi

I2C is not turned on by default. We can use raspi-config to enable it.

  1. Run sudo raspi-config.
  2. Use the down arrow to select 9 Advanced Options
  3. Arrow down to A7 I2C.
  4. Select yes when it asks you to enable I2C
  5. Also select yes when it tasks about automatically loading the kernel module.
  6. Use the right arrow to select the <Finish> button.
  7. Select yes when it asks to reboot.

The system will reboot. when it comes back up, log in and enter ls /dev/*i2c*. The Pi should respond with /dev/i2c-1 which represents the user-mode I2C interface.

Plugin Config Options

pimatic-bme280 config
OptionDescriptionDefault
debug
boolean
Debug mode
false

Device Config Options

pimatic-bme280 config

BME280Sensor

BME280Sensor config options
OptionDescriptionDefault
device
string
Device file to use; default /dev/i2c-1
"i2c-1"
address
string
Address to use; default 0x76
"0x76"
interval
integer
Interval in ms
"10000"
pimatic-i2c-bme280 is written by Marcus Wittig