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Subject: | How to capture messages generated by PyEpics? |
From: | "Li, Ji via Tech-talk" <tech-talk at aps.anl.gov> |
To: | "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
Date: | Thu, 18 Feb 2021 22:52:04 +0000 |
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
|