Speciallog.txt

There's a facility which may be of some use, although it's limited. If you stop Cumulus and add a line to the [Station] section of Cumulus.ini:

SpecialLog=1

It will then start updating a file called 'speciallog.txt' in the data folder with the following fields:

date(dd/mm/yy),time(hh:mm),inside temp,inside humidity,inside dewpoint,outside temp,outside humidity,outside dewpoint