Cumulus Support

Situation with a Davis main station and an Ecowitt Extra Sensor.
When starting up CMX it starts catching up the data from the Davis logger. Apparently it also tries to catch up data from the extra Ecowitt sensors. It then registers zero value for those extra sensors until reaching the time it has caught up and continues normal reading. I don't see how this comes about because the Ecowitt has no logger if I understand it well. Shouldn't the missed data just be skipped (now I get a dip in the chart, caused by my daily backup, when skipped I get a straight line between the last read and the first in normal reading).

It is skipped, that is why you have the dips - MX has no concept of a "null" value, so missing values are zero. Not ideal I know, but not a lot else can be done.

With skipped I mean no data is being logged so I don't find any line on that time in the logfile.
This e.g. happens with the Davis: when the logger does not have the data to close the gap you just don't get the records.

No, but MX does have a record for the main data, so when it constructs a set of values for that record it pulls in a zero value from the extra sensor. So unless you drop the main sensor data when there is no extra sensor data... Not something you would want to do I expect.

It is the same with any sensor value. If your temperature sensor went offline you would get zero values for that in your history too. During catch-up there is no data for the Ecowitt extra sensors, so it uses zero.

Ok, thanks.
I'll think about how to handle this or just leave it.