https://github.com/helins/linux.i2c.bme280.clj

Talking to BME280 sensors via I2C from Clojure JVM
https://github.com/helins/linux.i2c.bme280.clj

bme280 clojure i2c iot jvm sensors

Last synced: about 1 month ago
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Talking to BME280 sensors via I2C from Clojure JVM

• Host: GitHub
• URL: https://github.com/helins/linux.i2c.bme280.clj
• Owner: helins
• License: mpl-2.0
• Created: 2017-08-10T12:31:28.000Z (over 8 years ago)
• Default Branch: main
• Last Pushed: 2021-03-24T10:50:21.000Z (almost 5 years ago)
• Last Synced: 2025-08-15T06:55:13.196Z (5 months ago)
• Topics: bme280, clojure, i2c, iot, jvm, sensors
• Language: Clojure
• Homepage:
• Size: 1.62 MB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

          
# linux.i2c.bme280

[![Clojars

Project](https://img.shields.io/clojars/v/io.helins/linux.i2c.bme280.svg)](https://clojars.org/io.helins/linux.i2c.bme280)

[![Cljdoc](https://cljdoc.org/badge/io.helins/linux.i2c.bme280)](https://cljdoc.org/d/io.helins/linux.i2c.bme280)

Interact with the popular

[BME280](https://www.bosch-sensortec.com/bst/products/all_products/bme280)

sensor via [I2C](https://en.wikipedia.org/wiki/I%C2%B2C) from Clojure JVM.

Relies on [helins.linux.i2c](https://github.com/helins/linux.i2c.clj) for

performing I2C operations.

## Usage

This is an overview.

The [full API is available on Cljdoc](https://cljdoc.org/d/io.helins/linux.i2c.bme280).

In short, without error handling :

```clj

(require '[helins.linux.i2c        :as i2c]

         '[helins.linux.i2c.bme280 :as bme280])

(with-open [bus (i2c/bus "/dev/i2c-1")]

  (i2c/select-slave bus

                    0x76)

  (let [;; Those compensation words will be used for adjusting raw data received from sensors.

        compensation-words (bme280/compensation-words bus)

        ;; Configuration map.

        config             {:bme280/iir-filter               16

                            :bme280/mode                     :forced

                            :bme280/oversampling.humidity    :x1

                            :bme280/oversampling.pressure    :x2

                            :bme280/oversampling.temperature :x4}

        ;; Computes how many milliseconds a single measurement takes, at most.

        wait-ms            (:maximum (bme280/cycle-duration config))]

    (bme280/configure bus

                      config)

    (Thread/sleep wait-ms)

    (bme280/read-sensors bus

                         compensation-words)

    => {:bme280/humidity    46.932

        :bme280/pressure    960.3226

        :bme280/temperature 23.3}

    ))

```

## License

Copyright © 2017 Adam Helinski

Licensed under the term of the Mozilla Public License 2.0, see LICENSE.