[Coco] Drivewire over PI was: The BIGGEST PROBLEM with (So-Called) NEW CoCo Hardware...

[Allen Huffman]

> On Mar 7, 2017, at 11:06 AM, Brett Gordon <beretta42 at gmail.com> wrote:
> 
> I and another person have had similar problems Tim.  I investigated, and
> found very high latency is the problem.  The PI's software USB coupled with
> a cheap-o USB->RS232 do-hicky make for horrible latency.  So latent the DW
> server times out.  Every thing got peachy after I upped my drivewire
> server's timeout.   I don't know how to do this in Aaron's java based
> server though :(  I used William's 'lwwire' server to make it work.

At work, we connect to our flow computers (oil industry) via ethernet or serial. Since PCs don't come with serial ports, a USB adapter has to be used, and we have to specifically recommend certain ones that we know work. I guess this is not an uncommon problems.

FTDI versions seem to work well for me.

What I am unsure about is if the USB drivers support full flow control. The TTL stuff does not, assuming, I guess, "everything works perfectly these days." This would not have worked in the old days of modems with MNP compression and such, where flow control was in regular operation.

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