Sorry for bringing an old thread up here. I just posted this to the related wxforum post: https://www.wxforum.net/index.php?topic=38877
I'll copy-paste my post here: Following this thread and some threads and references elsewhere, I just got my WX station working with direwolf and weewx running on an rpi, and I wanted to point out that there's a small issue with the cwxn.py implementation, at least for APRS use. At first I thought everything was going great - I was beaconing out the wxnow.txt info and looking at aprs.fi everything looked good. But then I looked at the info in findu and noticed the dew point seemed to be messed up. Looking at it more closely, that was because the humidity was wrong. Instead of, for example, 92%, it was showing up as 9%. So I took a closer look at the format of the data. The humidity is being formatted as a 3 digit number by cwxn. But the APRS spec and CWOP spec indicate it should be 2 digits, and 00 should be interpreted as 100%. Apparently aprs.fi is being tolerant of the 3-digit number, but findu is not. I made a small change to cwxn.py to convert 100 to 0 and to format as %02d instead of %03d. All looks good in both aprs.fi and findu now. BTW, in case it's relevant, I'm using the cwxn.py that was posted earlier in this thread by gjr80. My station: https://tempestwx.com/station/28304 https://www.wunderground.com/dashboard/pws/KCAPACIF205 http://www.findu.com/cgi-bin/wxpage.cgi?call=AE6DC-5&last=240 https://aprs.fi/info/a/AE6DC-5 -Dave AE6DC On Wednesday, March 4, 2020 at 6:09:41 PM UTC-8 gjr80 wrote: > That is good news, the cwxn code is fairly basic and should have worked on > your earlier system. > > Gary > > On Tuesday, 3 March 2020 11:45:10 UTC+10, Bill Arthur wrote: >> >> Gary, >> >> Thanks again. Everything is working perfectly. >> >> BTW, I installed Weewx on a new RasPi. "binding = archive" works >> perfectly >> >> Bill >> >> On Sunday, March 1, 2020 at 9:36:30 PM UTC-6, Bill Arthur wrote: >>> >>> Gary, >>> >>> I watched the results after the last rain. The midnight column went to >>> 0.0 at midnight and the 24hr went down after 24 hours. Everything as >>> expected. >>> >>> It has now just started raining and all three columns are at 0.01. >>> >>> I believe we can say that the problem has been resolved. Thank you for >>> your quick and precise solution. >>> >>> Bill >>> >>> >>> >>> >>> >>> >>> On Saturday, February 29, 2020 at 12:21:26 AM UTC-6, Bill Arthur wrote: >>>> >>>> Going through the log it looks like I may have restarted the box when I >>>> installed an app. I didn't think I did it that early in the day, but I may >>>> have. I'll take the blame. >>>> >>>> Since then it's working flawlessly, the midnight total went away at >>>> 00:00. >>>> >>>> I'll know more Monday when it rains. >>>> >>>> Bill >>>> >>>> >>>> >>>> >>>> On Friday, February 28, 2020 at 8:55:59 PM UTC-6, gjr80 wrote: >>>>> >>>>> Don’t get too hung up on wxnow.txt, it merely pulls data from the >>>>> database/the current archive record and presents it. If the WeeWX >>>>> generated >>>>> plot you posted is correct then there is a discrepancy between what WeeWX >>>>> is receiving and what your meteobridge is receiving. This is best tracked >>>>> down by looking at the underlying data. Once we know the correct data is >>>>> being received/archived by WeeWX we can follow that data through WeeWX. >>>>> >>>>> Gary >>>> >>>> -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/5b68aed9-536d-47b9-8b09-7e7a74b092den%40googlegroups.com.
