Ultimately what I would like to do is develop a library in C# to emulate the CMRI node (similar to the CMRI library for arduino) such that I can use the GPIOs off the raspberry pi as input/output lines. From what I gather online the GPIOs are 3.3v and the input/output lines expect a different amount of voltage so I would have to look into how to step down the voltage as well (resistor etc.).Then I would create (or latch on to the existing) network driver in JMRI to connect and talk to the first raspberry pi in the chain of RS485 raspberry pis.However that is far down the line. I need to understand the actual serial messages first, the bytes it expects, the voltages it expects, and all of that info.I read on one of the sites that the C/MRI arduino library does not function on an arduino with an FTDI USB-Serial chip, is this correct? If so, which arduino would you recommend? The one from the blog looks like a nano but according to Arduino's site that has an FTDI chip as well (all of theirs for the most part does)Thanks,Dan
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