Experimental Physics and
Industrial Control System
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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | RE: How to capture messages generated by PyEpics? |
| From: | Mark Rivers via Tech-talk <tech-talk at aps.anl.gov> |
| To: | "'Li, Ji'" <liji at bnl.gov> |
| Cc: | "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
| Date: | Fri, 19 Feb 2021 01:11:00 +0000 |
|
Ø
When I get/set from PyEpics (tried both PV module and CA module), the program was able to successfully get the up-to-date value of the PV and set new value to it,
Ø
> but no messages showed up. Doesn't PyEpics communicate using CA protocol messages? Are there specific filter/configuration to be done in Wireshark to show these messages? There is no difference in the CA network messages using caget and PyEpics. They both use the same libca.so library from EPICS base. You must have something configured wrong in Wireshark or something. Mark From: Tech-talk <tech-talk-bounces at aps.anl.gov>
On Behalf Of Li, Ji via Tech-talk Hi, I'm trying to capture CA messages targeting a specific PV on the IOC server with Wireshark (v1.12.1) and Michael Davidsaver's cashark plugin (ca.pv or ip.addr as the filter). Wireshark
was able to capture messages generated by caget/caput commands ran from bash. When I get/set from PyEpics (tried both PV module and CA module), the program was able to successfully get the up-to-date value of the PV and set new value to it, but no messages
showed up. Doesn't PyEpics communicate using CA protocol messages? Are there specific filter/configuration to be done in Wireshark to show these messages? Thanks. -Ji Li |
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