[TriEmbed] best tool for automagic interaction with USB serial ports

[Pete Soper]

On second glance I see some extra logic would have to be added to the 
Udev rule to assign consecutive numbers to names like 'arduino_1', 
'arduino_2', etc. But default rules do this somehow.
-Pete


On 2/27/19 7:16 PM, John Vaughters via TriEmbed wrote:
>
> Pete,
>
> If you are using the same USB devices all the time and do not expect 
> changes, consider doing udev rules. Below is an article I wrote about 
> it. Basically it recognizes your USB device based on certain ID's and 
> you can name the device whatever you want. As far as communicating, 
> "expect" scripts is as good as any tool I can think of. The only thing 
> that is probably better is Tera-Term, but that is strictly windows. It 
> is quite good though and I wrote a tool to run scripts to 300 edge 
> routers using Tera-Term. One thing I used to do is use "socat" to send 
> the serial device to a raw TCP port and communicate over the network. 
> In general I do everything I can to not communicate to USB devices due 
> to their constant connection issues. I prefer using UART if possible.
>
> Good Luck,
>
> John Vaughters
>
> Arduino Communications Device Naming with udev - Combustory 
> <http://combustory.com/wiki/index.php/Arduino_Communications_Device_Naming_with_udev>
>
>
> 	
>
>
> 	
>
>
>     Arduino Communications Device Naming with udev - Combustory
>
> <http://combustory.com/wiki/index.php/Arduino_Communications_Device_Naming_with_udev>
>
>
> On Wednesday, February 27, 2019, 4:41:50 PM EST, Pete Soper via 
> TriEmbed <triembed at triembed.org> wrote:
>
>
> It's been many years since I used the Unix "expect" command but that was
> the industrial strength solution for automated interaction with a serial
> connection such as via ssh where you specify a "script" of "this is
> sent, this is what's received back", interactions and the logic to take
> actions based on the interaction details. What's out there now that I
> should be using, or is this still the best way to go? My host
> environment choices are Linux or Cygwin (inside a VM).
>
> My situation is that I have three or four flavors of device that I need
> to connect to with either ssh or a terminal emulator where a script of
> some sort dictates what I have to send and what I expect back. This, in
> turn, is to deal with the musical chair situation with USB connections
> such as when I get intermittent electrical service from Duke Energy (at
> no extra cost!) I've got an automated test system where there are, for
> example, /dev/ttyACM{0,1,2,3,4,5,6,7}, /dev/USB{0,1,2,3}, etc, and I
> need to establish and keep fresh meaninfully named symlinks that get
> associated with the right devices assigned randomly by system startups,
> being forced to unconnect/reconnect cables, etc.
>
> .
> Thanks,
> Pete
>
>
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