[Dsg-halla_gas] [EXTERNAL] Re: Login instructions and remote monitoring

[Brad Sawatzky]

Hi Marc,

I would recommend running the GEM readout in a VNC session.  That would
allow multiple people to view the screen at a time.  It would also allow
for full remote operation of the GUI.   (That is, the software will run
persistently within the VNC session, even if a remote user starts it,
and will not die if the remote connection drops or someone else wants to
view the GUI).

-- Brad

Oe Fri, 18 Dec 2020, Marc Mcmullen wrote:

> Hi,
> DSG has installed the GEM Gas Flow Readout single board computer (Raspberry
> Pi). The software installed is prototype and will be updated in 2021.
> Here are some important notes on monitoring:
> 
>  1. It is best practice to remotely login using the instructions attached to
>     this email to monitor the gas flow, even if you are local (at the lab).
>     If you are at the gas distribution rack, please observe the flow by
>     looking at the Flow Meter Panel in the rack.
> 
>   1. logging in and running the display on the local Raspberry Pi monitor
>      will prevent viewing the display remotely
>   2. If the display is left on locally, the CSS program will have to be
>      "killed" or the Raspberry pi will have to be rebooted (~ 2 minutes) and
>      all software must be restarted (~ 2 minutes) per the instructions (on
>      the desktop of the Raspberry Pi and in this email)
> 
>  2. To remote monitor follow the instructions attached to this email. DSG
>     has already started the monitoring program, if it is not running:
> 
>   1. restart the software by following the attached instructions (also on
>      the desktop of the Raspberry pi)
>   2. send an email to the group and someone will restart the software
> 
>  3. Only one person can remotely log into the Raspberry Pi at a time,
>     logging in will disconnect someone who is already logged in, so please
>     coordinate with each other via email and disconnect by closing the
>     Remote Desktop window when you are finished monitoring
> 
> In future updates, DSG plans to make a web distribution for the prototype
> software, allowing multiple users to monitor the CSS screen.
> Finally, EPICS will be used to monitor gas flow during hall operations.
> Regards,
> Marc



-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov