Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Fri, 27 Jun 2008 11:25:44 -0500

On 6/27/08 9:55 AM, Burkhard Kolb wrote:
> Hi,
> I have a set of network controlled power switches from Gude
> (www.gude.info).
> They support status readback and on/off and power cycle functions
> through a web interface. Unfortunately that is the only interface.
> The vendor also supplies a perl script which can parse the response from
> the web server. This looks almost like a protocol in streamDevice...
> Any advice on how to get this into EPICS records?
> Cheers,
> Burkhard

Hi, Burkhard.

One approach would be to write a screen scraping SNL program.  I wrote a
driver for the DLI PC-8000 Ethernet Power Controller using this method.
 It sends HTTP requests to the device's embedded web server and extracts
the information of interest from the responses.  If you want to see how
it works, or copy and modify it, you can download it at

  http://www.imca.aps.anl.gov/~jlmuir/software/dli-epcr.html

Lewis

-- 
J. Lewis Muir
Software Engineer
IMCA-CAT/CARS

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System