On Monday I took delivery of a logger for the VP2. On Tuesday the WMR100 lost contact with its sensors. Since it wasn't raining, this seemed like a good time to swap stations.
I deleted the WMR100 and disconnected it from Meteohub. I plugged in the cable to the VP2, defined a new station and adjusted the sensors. Unfortunately changing the stations created a significant discontinuity in the raw rainfall data.
As you probably know, WMR100 consoles stop transmitting data over their USB interface after seemingly random amounts of time. This is one of reasons that drove me to replace it.
The only way to re-establish communication is to power-cycle the console. Doing this zeros the rainfall accumulator. Consequently, the WMR100's total rainfall was 32.8mm (which is the amount of rain that had fallen since the last console reset).
The VP2 is much more robust and doesn't require frequent resetting. It also preserves its data when the power is off. Consequently its total (yearly) rainfall is 341.6mm. This is the correct year-to-date amount of rain at my station's location.
The two raw rain records either side of the changeover are:
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20160823085619 rain0 0 0 328 20160823093200 rain0 0 0 328 20160823095441 rain0 0 0 3416 20160823095543 rain0 0 0 3416
I welcome any suggestions as to how I might eliminate the 308.8mm glitch from Meteohub while maintaining the correct yearly rainfall in the VP2 console.