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.young...@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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