While the RPi is not as cheap as they once were, they are perfect little
devices to dedicated to a weather station. I have been using a RPi3B with
an acurite console since 2016. I recently started to move to weewx5 and in
the process upgrade it to a 4GB RPi4. While the RPi3b still works fine, I
was impressed with how much faster the RPi4 is. Building the reasons skin
took about half the time. Currently I still have both Pis set up with
different consoles both reading frome the same station until I get the new
Pi and Weewx5 set up just how I want it.
Personally I would set up a dedicated pi per acurite station. 😁
On Saturday, February 24, 2024 at 4:31:25 PM UTC-6 Patrick Whaley wrote:
> Thank you all for your quick responses with useful information as you've
> definitely help direct my efforts.
>
> I spent the last few days setting up a hypervisor ('pimox' aka ProxMox 7)
> on my raspberry pi 400 (since it's the only spare computer I have that is
> capable of running VM's), with the intent of running two debian linux VM's,
> each with their own install of weewx and hopefully being constricted to
> 'seeing' a single/specified AcuRite system on USB.
>
> ProxMox & debian work/run great, but unfortunately it seems I'm back
> at/near square one as this does not seem to be able to solve the original
> problem.
>
> Turns out there are multiple ways to setup USB ports in the VM's , and
> ways to turn USB ports on/off in linux - I tried all the conventional
> options and some hacks, but ultimately if I have both AcuRite's hooked to
> teh pi, and both VM's running weewx, one VM weewx will work and the other
> VM weewx will not, as it claims it's not receiving USB data from an
> AcuRite. Shutting down the working VM frees up (or whatever is going on)
> the AcuRite usb data for the other VM and it starts working.
>
> I'm going to put this one on the back burner for now but am not throwing
> in the towel just yet ;-)
>
> -pw
>
> On Wednesday, February 21, 2024 at 3:36:46 PM UTC-5 p q wrote:
>
>> I wonder if it would be easier to use SDR on one sensor unit and USB for
>> the other so that way you know which you're getting. I am not familiar with
>> weewx-multi, so maybe I'm talking crap.
>>
>>
>>
>> On Wed, Feb 21, 2024 at 12:02 PM matthew wall <[email protected]> wrote:
>>
>>> hi patrick,
>>>
>>> unfortunately, every acurite station looks the same - there is no unique
>>> identifier that lets you distinguish one station from another via the USB
>>> interface.
>>>
>>> if chaney instruments had done it right, they would have burned a serial
>>> number into each device, not just idProduct and idVendor.
>>>
>>> in lieu of an identifier for each device, another approach is to
>>> distinguish devices based on their locations in the usb tree. if you could
>>> do that, then you could conceivably plug them into a usb hub that has ports
>>> whose addresses are repeatable across reboots (that might even apply to the
>>> usb 'hub' built in to the computer).
>>>
>>> i am not sure whether this is possible, but it would be a fun little
>>> project to determine the feasibility. and it is probably easier now that
>>> libusb is not as volatile as it was 10 years ago.
>>>
>>> when you initiate communication with a HID (which is how the acurite and
>>> other usb-based stations present themselves), you specify idProduct and
>>> idVendor, then take the first one that shows up. if a device has a unique
>>> identifier, you can match on that too (the ws28xx transceviers are an
>>> example of this. some, but not all, USB-to-serial converters are too, but
>>> they are not HID). it *might* be possible to use the usb tree information
>>> to distinguish devices. or maybe the HID interface lets you enumerate them
>>> - not sure whether the libusb and pyusb layers even let you determine
>>> whether there are multiple devices that match.
>>>
>>> m
>>>
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>>>
>>
>>
>> --
>> Peter Quinn
>> (415)794-2264 <(415)%20794-2264>
>>
>
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