[GreenKeys] OT - Help with Arduino USB Shield

[epvgk at limpoc.com]

On Thu, Dec 15, 2016 at 12:49:56PM -0500, Steve Garrison wrote:
> While the topic says "Off Topic," it really isn't way off topic since it TTY
> related.  In the long run it might come in real handy for others.
> 
>  
> 
> I'm trying to connect Eric's USB current loop serial adapter to an Arduino
> USB Host Shield so I can take data from the Arduino and send it to whatever
> current loop device I have connected to Eric's board.

I wasn't even aware there was a USB host implementation for arduino. That sounds
hard, because implementing USB hosts is complicated. Hopefully there is a canned
arduino library framework that packs it all up for you. 

I wonder if it wouldn't be easier to just use software "bitbanged" serial and a 
simple optical interface to the tty loop? 

As far as the adapter itself, it just presents itself as a very standard CDC ACM
endpoint, which is probably the simplest USB device example. 

eric



> 
>  
> 
> I'm really having trouble seeing how to implement the USB host shield once
> connected to the Arduino.  The examples that I have looked at just leave me
> scratching my head!!
> 
>  
> 
> Is there anyone out there that has any experience using an Arduino USB
> shield that might be able to help me out?
> 
>  
> 
> The long range goal of this project might just be of interest to all if I
> can get over this hurdle.  But I'll save that story for a later update.
> 
>  
> 
> Steve G./N4TTY
> 
>  
> 
>  
> 

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