APRS "wxnow.txt" humidity problem

[AK7V]

Hello,

I am having a problem with the wxnow.txt file generated by Cumulus for submission to the APRS network. Humidity is only allocated 2 characters -- 00 through 99. My relative humidity reached 0% a couple of times last week and Cumulus rationally inserted "h00" into the APRS weather string. The problem is that APRS interprets "h00" as 100% humidity. There is no provision for 0%. Anyone have an idea for a work around? Can Cumulus insert "h01" for 1% humidity when the actual measured humidity is 0%? Any other ideas?

Thanks,
Jason

[steve]

I think 0% RH is impossible in reality, but given the 3% accuracy of the Davis, and the spec says its range is 0 to 100 - and I guess you live somewhere extremely dry! - I'll have to handle it somehow. Clearly APRS didn't expect zero to actually happen, because as you rightly say they use that for 100%. I think your suggested work around is reasonable, and I'll implement that.

[AK7V]

Yeah, it doesn't seem possible, but it does get pretty dry here! And another station using the same hardware, about a mile away, also recorded 0% RH that day. Thanks for you attention on this!

-Jason