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Hi Brad,</div>
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<br>
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I have experimented with VNC, but there are some hoops to get around. Do you have a few minutes to chat? Not sure if you are on vacation.<br>
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<br>
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Thanks,</div>
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Marc<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Brad Sawatzky <brads@jlab.org><br>
<b>Sent:</b> Monday, December 21, 2020 2:18 PM<br>
<b>To:</b> Marc Mcmullen <mcmullen@jlab.org><br>
<b>Cc:</b> dsg-halla_gas@jlab.org <dsg-halla_gas@jlab.org>; Chuck Long <mlong@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: [Dsg-halla_gas] Login instructions and remote monitoring</font>
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<div class="PlainText">Hi Marc,<br>
<br>
I would recommend running the GEM readout in a VNC session. That would<br>
allow multiple people to view the screen at a time. It would also allow<br>
for full remote operation of the GUI. (That is, the software will run<br>
persistently within the VNC session, even if a remote user starts it,<br>
and will not die if the remote connection drops or someone else wants to<br>
view the GUI).<br>
<br>
-- Brad<br>
<br>
Oe Fri, 18 Dec 2020, Marc Mcmullen wrote:<br>
<br>
> Hi,<br>
> DSG has installed the GEM Gas Flow Readout single board computer (Raspberry<br>
> Pi). The software installed is prototype and will be updated in 2021.<br>
> Here are some important notes on monitoring:<br>
> <br>
> 1. It is best practice to remotely login using the instructions attached to<br>
> this email to monitor the gas flow, even if you are local (at the lab).<br>
> If you are at the gas distribution rack, please observe the flow by<br>
> looking at the Flow Meter Panel in the rack.<br>
> <br>
> 1. logging in and running the display on the local Raspberry Pi monitor<br>
> will prevent viewing the display remotely<br>
> 2. If the display is left on locally, the CSS program will have to be<br>
> "killed" or the Raspberry pi will have to be rebooted (~ 2 minutes) and<br>
> all software must be restarted (~ 2 minutes) per the instructions (on<br>
> the desktop of the Raspberry Pi and in this email)<br>
> <br>
> 2. To remote monitor follow the instructions attached to this email. DSG<br>
> has already started the monitoring program, if it is not running:<br>
> <br>
> 1. restart the software by following the attached instructions (also on<br>
> the desktop of the Raspberry pi)<br>
> 2. send an email to the group and someone will restart the software<br>
> <br>
> 3. Only one person can remotely log into the Raspberry Pi at a time,<br>
> logging in will disconnect someone who is already logged in, so please<br>
> coordinate with each other via email and disconnect by closing the<br>
> Remote Desktop window when you are finished monitoring<br>
> <br>
> In future updates, DSG plans to make a web distribution for the prototype<br>
> software, allowing multiple users to monitor the CSS screen.<br>
> Finally, EPICS will be used to monitor gas flow during hall operations.<br>
> Regards,<br>
> Marc<br>
<br>
<br>
<br>
-- <br>
Brad Sawatzky, PhD <brads@jlab.org> -<>- Jefferson Lab / Hall C / C111<br>
Ph: 757-269-5947 -<>- Fax: 757-269-5235 -<>- Pager: brads-page@jlab.org<br>
The most exciting phrase to hear in science, the one that heralds new<br>
discoveries, is not "Eureka!" but "That's funny..." -- Isaac Asimov<br>
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