As far as question #2, have you wired to the screw-attached green wiring
block INSIDE the base of the WXT and run a cable out through the
gland-seal and attached that to your SDI interface to your computer to
monitor the data stream? If not, I can look to see if I can find the
pin-out in one of my manuals a bit later today and get an image of the
diagram to attach here for your reference.
When I was working with WXTs some time ago, I used the Vaisala USB
programming cable only to send configuration information to the unit,
and had RS232 (and the SDI when I played with it) connected directly to
the inside board as the final configuration would have it when mounted
outside.
I'm sure by now you have figured out that the WXT cannot be configured
by sending commands over the other connections, and you had better make
sure that the unit is configured exactly as you want (and most times
you'll never change it from the set up you determine to be best for you)
but it is a pain to want to switch outputs since you'll not only have to
get a programming cable again, but also get the WXT down from the
outdoors mount and put it back on the bench. Grrr.
Today is a busy day, but for diversion I hope to pull the manual and get
the correct picture of the inside for you.
I take it you do not have the spiral bound manual for the WXT? All these
are laid out in there, along with all the commands to enable and
configure the outputs.
What exact model of the WXT520 do you have? Can you send the model
number and the long string of letters and numbers which tell how your
unit was built?
Dale
On 1/4/2022 5:15 AM, Andrew Terhorst wrote:
Happy new year forum!
I have my WXT520 displaying data on the weewx web page in my bench
test. I used the WXT520 driver sourced from
https://github.com/matthewwall/weewx-wxt5x0.
For my bench test, I borrowed a Vaisala USB data configuration cable.
I configured the WXT20 to send data in sdi12 format.
I have three questions:
1. The barometric pressure data is not being picked up. Where do I
enable this data to be displayed?
2. I need to return the Vaisala cable. I have an M12 cable - can
someone share with me the sdi12 wiring diagram to connect the data
lines to the RaspberryPi?
3. Can I still use the WXT520 driver from
https://github.com/matthewwall/weewx-wxt5x0 or does this work only
with the Vaisala USB cable?
Thanks in advance.
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