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Sensirion I2C SEN44 Arduino Library

This is the Sensirion SEN44 library for Arduino using the modules I2C interface.

<center><img src="images/SEN4x.png" width="500px"></center>

Installation

To install, download the latest release as .zip file and add it to your Arduino IDE via

Sketch => Include Library => Add .ZIP Library...

Don't forget to install the dependencies listed below the same way via Add .ZIP Library

Note: Installation via the Arduino Library Manager is coming soon.

Dependencies

Quick Start

  1. Connect the SEN44 Sensor to your Arduino board's standard I2C bus. Check the pinout of your Arduino board to find the correct pins. The pinout of the SEN44 Sensor module can be found in the data sheet and here:

    SEN44ArduinoJumper Wire
    VCC5VRed
    GNDGNDBlack
    SDASDAGreen
    SCLSCLYellow
    SELGND for I2CBlue
    <center><img src="images/SEN44_pinout.png" width="300px"></center>
    PinNameDescriptionComments
    1VDDSupply Voltage5V ±10%
    2GNDGround
    3RXUART: Receiving pin for communicationTTL 5V and LVTTL 3.3V compatible
    SDAI2C: Serial data input / outputTTL 5V and LVTTL 3.3V compatible
    4TXUART: Transmission pin for communicationTTL 5V and LVTTL 3.3V compatible
    SCLI2C: Serial clock inputTTL 5V and LVTTL 3.3V compatible
    5SELInterface selectLeave floating or pull to VDD to select UART
    Pull to GND to select I2C
    6NCDo not connect
  2. Open the exampleUsage sample project within the Arduino IDE

    File => Examples => Sensirion I2C SEN44 => exampleUsage

  3. Click the Upload button in the Arduino IDE or

    Sketch => Upload

  4. When the upload process has finished, open the Serial Monitor or Serial Plotter via the Tools menu to observe the measurement values. Note that the Baud Rate in the corresponding window has to be set to 115200 baud.

Contributing

Contributions are welcome!

We develop and test this driver using our company internal tools (version control, continuous integration, code review etc.) and automatically synchronize the master branch with GitHub. But this doesn't mean that we don't respond to issues or don't accept pull requests on GitHub. In fact, you're very welcome to open issues or create pull requests :)

This Sensirion library uses clang-format to standardize the formatting of all our .cpp and .h files. Make sure your contributions are formatted accordingly:

The -i flag will apply the format changes to the files listed.

clang-format -i src/*.cpp src/*.h

Note that differences from this formatting will result in a failed build until they are fixed.

License

See LICENSE.