On Jan 19, 2008, at 20:32, Alex Carver wrote:
Steve can fill in a lot of the details but he's trying to use two
computers with one Ultimeter and doesn't want to split the serial
ports in hardware, instead he's going to try splitting the port by
software.
I got the impression that the plan for two computers was only an
interim solution. The tone of the first message seemed to be that he
was migrating the weather over to Mac too if he could. I'd like to
see the documentation improved in this area. I haven't done weather
yet either. I don't even have the hardware yet. I'm leaning toward
One-Wire Weather (OWW) but haven't even been able to determine if it
is compatible with Xastir yet. This is what the help file says
currently:
Configure a Serial WX Station
Set the serial port device for your WX unit. Common values of /dev/
ttyS0
(COM1) or /dev/ttyS1 (COM2) can be used.
Comment will allow you to set a friendly name or comment for the port.
Selecting "Activate on start up" will tell Xastir to look for this
device and
set up communications with it when the program first starts.
Now set the bps rate under port settings, and the parameters under
port
style. Port Style setting 8N1 is used for 8 data bits, No parity
and 1 stop
bit. 7E1 is used for 7 data bits, even parity and 1 stop bit. 7O1
is used for
7 data bits, odd parity, and 1 stop bit. These parameters must
match your WX
unit. The Data Type option will allow you to override what type of
serial data
the program will look for. The auto-detect feature will first look
for Weather
data in a binary type as the Radio Shack WX-200 uses. If no binary
data is
found in the stream, Xastir will look for an ASCII type of WX
station (like
Peet Bros.).
Now set the Rain Gauge correction factor. Xastir requires that the
rain gauge
report in .01 inch increments. If the unit reports in .1 inch or .1
millimeter
increments, a correction must be specified to obtain accurate
measurements.
This gives me the impression that only Radio Shack and Peet Bros
units are compatible. I don't see anything in any of the README files
that adds to what is here. The FAQ only adds the following when
talking about redirecting serial ports (how does that really have to
do with setting up a weather station anyway):
if you wish to put your weather station on a remote serial port,
investigate using OWW (for Dallas weather stations), wx200d
daemon for some Radio Shack/Huger/Oregon Scientific weather
stations, or Meteo daemon for Davis weather stations.
So it seems we could use some help gathering the collective
consciousness relating to (a) what is compatible and (b) how to set
it up and write up some docs to go into (a) the help file, (b) the
FAQ, and (c) a README file (perhaps a new one dedicated to weather
stuff). I would contribute toward this goal, but I have no knowledge
of the topic (yet).
-- Chip
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