Once a second seems more than enough. Even the venerable Davis Loop is
every two seconds. I don't know how quickly things need to be read
during a heavy rainstorm, but I would think that the hardware would be
keeping track of tips, if using a tipper mechanism.
I only look at the Currrent values and the plots generated by the
Seasons skin and updating every second would be a waste of CPU, I'd think.
Dale
On 4/22/2023 9:28 PM, Craig Young wrote:
By any chance can weewx read from a data file? I could write the
incoming real time data to the file as a one line record and then
weewx would read this, say once a second or so.
On Sunday, April 23, 2023 at 1:56:52 PM UTC+12 DR wrote:
Craig, I don't know of a driver for the Campbell dataloggers.
I wish there were one, I have a very dependable station (CR3000)
that I'd like to interface. Right now it is filling the native
tables, and a Weather Display driver using pakbus is pulling those
values from that table and handing them off to Weather Display, so
I know 'something' could be made to work.
I am using a Texas Weather Instruments which, with the help of
someone who knows Python a lot better than me, helped to get
running. It basically sends a send data command and then a data
string gets sent from the TWI, which the driver then parses and
loads into a packet and hands off to WeeWx. I'm assuming that it
can be adapted to other devices.
I am trying to learn Python well enough to write or modify a
driver and the learning curve for this old FORTRAN and ALGOL guy
is steeper than I thought it would be, but I am getting closer.
Things like synchronization with an incoming unrequested stream
and how packets are formed and sent seem to by my next steps.
I wish I could say that within a few months I'd have a polished
working driver, but with many other demands on my free time,
progress is slow.
If you've got a program on your PC that pulls in the live data
stream you are perhaps in a much better place to write a routine
to emulate that process and then look at how, for instance, the
TWI driver forms a packet to hand off to WeeWx.
I'm hoping you could use that little info to plan on how to get a
working driver that you might share with the rest of us. My
encouragement to make it work is all I can give you otherwise, but
sounds like you are pretty close.
The MQTT recommendation is something you might look at, too. I
know little about that. I am grateful to those who have furnished
so much already. Dale
On 4/22/2023 8:04 PM, p q wrote:
I don't know the answer to the primary question.
As to recommended protocols, I'd choose MQTT.
On Sat, Apr 22, 2023 at 5:53 PM Craig Young
<craig.y...@gmail.com> wrote:
Is there a driver for the CR300 data logger? If not, I have
a PC connected to the data logger, collecting the live data
stream which I can reformat and send as either RS232 or
UDP/IP packets to weewx in any format. Would need a
recommendation on which protocol to use. But hopefully,
there is already a driver for the CR300 or a 'generic' driver.
Craig
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