Interfacing SX1509 pin expander

  • Hello.
    I am really impressed with Rexygen.

    I have a question about I2C support on Raspberry Pi. I have SX1509 pin expanders that I would like to interface with. Is this possible?


  • Hi Chris,

    thank you for reaching out.

    Yes, it is possible to interface with SX1509 via I2C using REXYGEN. However, it will require a bit of hand-coding.

    Have a look at function block called REXLANG and its function "OpenI2C" -

    There are also some examples on I2C communication available - "0502 Generic I2C Communication" folder in Examples library (which is part of REXYGEN Studio) - these might help you to see how to implement the I2C communication according to your needs.

    Let us know about your progress.

    Regards, Tomas

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