There's an OSC library for Arduino here:
https://github.com/CNMAT/OSC
Using SLIP it can communicate over serial line using [comport] on the Pd end.

Martin

On Wed, Jun 1, 2016 at 10:29 AM, Rick Snow <ricksnow@gmail.com> wrote:
Hello list!

I am looking for some advice on sending messages from PD to an Arduino sketch.  Essentially, I plan to connect a mac to an Arduino via USB and control a large amount of variables within the Arduino sketch from PD.  

Is using the sysex message with the [arduino] object message the way to go with this?  How can I "tag" the messages so that they go to the correct variable in the arduino sketch?  Is there a practical limit to the speed of such a system?

I am much more familiar with using OSC messaging between applications but when I looked into using OSC with Arduino it seemed like I needed to use an ethernet shield (instead of connect via usb) and I would rather not go that route unless absolutely necessary.

Any advice is much appreciated!

cheers,
Rick 

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