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<== Date ==> <== Thread ==>

Subject: Re: SNMP device support
From: "John A. Priller" <[email protected]>
To: <[email protected]>
Date: Wed, 20 Mar 2013 10:40:20 -0400
Some history of our SNMP driver:

I wrote a modification of the DESY SNMP driver when we got our first Wiener/ISEG/MPOD crate a few years back, just to add write support. I then undertook a much bigger re-write to give sets priority over reads in the transaction queues, as our operators were complaining about how unresponsive tuning was. I was unaware of Sheng Peng's version at the time or perhaps I would have started with that. I haven't dug into it to see what it does about prioritization.

At the moment we've got 7 MPOD crates we're using our NSCL/FRIB driver with but none are officially "production", they're in beamlines under development but they get a decent amount of use with some actual beam. I'm always happy to hear how it's working for others!

On 3/19/2013 12:17 PM, Eric Norum wrote:
I looked at the various SNMP EPICS support modules when we received some Wiener VME crates a couple of months ago and decided that the MSU package from John Priller looked the best for documentation, capabilities and recent support.  I added a few minor changes and it's working well for us now.   The most important change is one that provides a mechanism for long OID strings in INP/OUT fields.  These changes have been folded into the distribution (version 1.0RC6).

On Mar 19, 2013, at 3:19 AM, "Florian Feldbauer" <[email protected]> wrote:

Dear all,

for our low voltage power supply, we are thinking about using the Wiener MPod which is controlled via SNMP.
 From Wiener I know that there are some implementations for EPICS:
- The original devSNMP from DESY
http://www-mks2.desy.de/content/e4/e40/e41/e12212/index_ger.html
- An extension of the first one from John Priller
http://groups.nscl.msu.edu/controls/
- and a third one from Sheng Peng from Diamond light source
http://controls.diamond.ac.uk/downloads/misc/snmp.tgz

Is there any great difference in those device supports? Especially between the second and third one?
Are there any recommendation which one to use?

Best regards,
Florian

--
----------------------------------------
| Dr. Florian Feldbauer                |
|                                      |
| Helmholtz-Institut Mainz /           |
| Johannes Gutenberg-Universität Mainz |
| Johann-Joachim-Becher-Weg 45         |
| D-55128 Mainz                        |
|                                      |
| Office: 01/217                       |
| Phone:  (+49)6131 / 39-25829         |
----------------------------------------


--
John A. Priller            | Phone : (517) 908-7375
MSU Cyclotron Laboratory   | Fax   : (517) 908-7126
640 S. Shaw Lane rm 1300D  | Email : [email protected]
East Lansing, MI 48824     | Web   : http://www.nscl.msu.edu/~priller/


References:
SNMP device support Florian Feldbauer

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