On 23/10/2019 10:26, NY wrote:
> "RobH"  wrote in message
> news:h19cl0Fel6mU1@mid.individual.net...
>> On 22/10/2019 20:57, NY wrote:
>>> "RobH"  wrote in message
>>> news:h194blFd0tiU1@mid.individual.net...
>>>> The other weather, program, is all set ready to run when I make the
>>>> decision to disconnect the ubuntu machine which currently runs the 2
>>>> programs.
>>>
>>> What weather program do you use? I run Cumulus MX on Raspbian on my
>>> Pi 3B+ and it does a very good job; in my case, I migrated from
>>> Windows to Pi for the weather station (and the PVR software -
>>> TVHeadend), to reduce the power consumption for applications that had
>>> to be run 24/7.
>>
>> I use the same weather program, CumulusMX, and it runs great
>
> That will run on Raspbian (using the Mono package) and doesn't need
> Ubuntu. However the other package that you use (was it a CCTV package)
> may need Ubuntu, hence your need to get Ubuntu working on the Pi 4.
>
>
> I used to use the older version of Cumulus on my Windows PC and it
> suffered from being able to read the very recent readings from the
> data-logger on my Davis weather station if Cumulus was stopped and then
> restarted for some reason (eg power cut). As long as the PC rebooted
> within the 10-minute window of time between one logged reading and the
> next, I was fine. If the delay was longer, I'd get some historical
> readings but often the most recent ones would be missing and I'd have to
> hand-edit the log file so there weren't gaps.
>
> Cumulus MX on the Pi seems to be virtually bulletproof in this respect -
> it's very rare to get missing readings. I do occasionally get readings
> that jump back in time half an hour or so, but that's because the
> real-time clock in the Pi is a bit hit-and-miss following a reboot,
> until the clock has had chance to resync with a master time source (NTP)
> on the web. I've got wise to that: after any power cut, I always check
> the clock and set it manually with the "date" command if it's wrong, so
> it's much closer to the correct time until a proper NTP resync can
> occur. It's only really a problem if the router takes a long time to
> connect and isn't ready and waiting for when the Pi calls for a time sync.
>
>
> If you need to port the log files from one computer to another, it's as
> simple as copying the contents of the ~/CumulusMX/data directory from
> one computer to another, preferably with Cumulus not running.

The cctv program is xeoma and runs on the pi with raspian-buster. It
didn't want to run when I tried Ubuntu server, but have raspian on the
card now.
That is what I intend to do, just copy the data files over from the
ubuntu machine to the pi4, as soon as I am ready to do the swap.

I run 2 monitors on the ubuntu machine, 1 for cumulus and 1 for xeoma,
so as the pi4 has 2 hdmi ports, I just need another vga to micro hdmi
adaptor now, and I'm good to go as it were.

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