<![CDATA[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?

Thanks
Chris

]]>https://forum.rexygen.com/topic/17/interfacing-sx1509-pin-expanderRSS for NodeSat, 18 Apr 2026 19:42:37 GMTMon, 25 Mar 2019 06:39:38 GMT60<![CDATA[Reply to Interfacing SX1509 pin expander on Mon, 25 Mar 2019 07:57:23 GMT]]>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" - https://www.rexygen.com/doc/PDF/ENGLISH/BRef_ENG.pdf#page=439

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

]]>https://forum.rexygen.com/post/28https://forum.rexygen.com/post/28Mon, 25 Mar 2019 07:57:23 GMT