Cumulus Support

I have two identical Davis Vantage Pro systems both running CumulusMX on their own Pi, one uses Davis data logger cable, the other a straight serial to USB cable with no logging. In both cases the Console display shows Daily Rain (in mm) 1.27 times larger than shown in the Cumulus display. I can correct Cumulus by changing the rain calibration factor from 1 to 1.27 but why should this be necessary?
Running CumulusMX b3173
John

Have answered my own question, console sees each seesaw click as 0.01" but Cumulusmx sees each click as 0.2mm instead of 0.254mm hence needs factor of 1.27 to correct.

Rather than setting a calibration factor, you should set the tipper size to 0.01" under the Davis advanced settings. If you do not set this, CMX infers the default tip size from your units, using the metric tipper size of 0.2mm if you use rainfall in mm, and the imperial 0.001" if you use inches.