[aprssig] NMEA and WX stations

[Lynn W. Deffenbaugh (Mr)]

Two independent sources of the same link.  Must be the best one there is.

Yes, weather software that creates the wxnow.txt file updates it 
periodically.  APRS software that uses the wxnow.txt file polls it for 
changes and generates APRS packets periodically as well.  The two 
periods don't necessarily coincide as the both programs are running in 
parallel.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 12/21/2017 3:30 PM, Tom Russo wrote:
> On Thu, Dec 21, 2017 at 08:23:20PM +0100, we recorded a bogon-computron collision of the <skoric at uns.ac.rs> flavor, containing:
>> On 12/15/2017 01:26 PM, Lynn W. Deffenbaugh (Mr) wrote:
>>
>>> The most convenient and broadest supported weather information
>>> interchange that is APRS compatible is the wxnow.txt file.?? If your
>>> weather station (or 3rd party) software can generate this file, most
>>> APRS clients can pick it up and beacon weather.
>>>
>>> Some software supports various native weather station protocols, but I
>>> cannot enumerate them personally.
>>>
>>> Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
>>>
>>> PS.?? See also http://aprsisce.wikidot.com/doc:weather-stations and
>>> http://wiki.sandaysoft.com/a/Wxnow.txt
>>>
>> Lynn, others ...
>>
>> I have checked those links. As I understood, at first wxnow.txt file
>> must be created. And it will only contain these 2 lines after the
>> weather monitoring starts for the first time. So it only contains one
>> data set. And if I want to get permanently updated data, does a new file
>> has to be created with every new data? Or is the file permanently
>> overwritten? Or is the new data appended?
> The file is updated so that at any given time it contains 2 lines.
>
> One program that uses the format has some decent documentation:
>
> http://wiki.sandaysoft.com/a/Wxnow.txt
>