Hi all,
thanks for sharing the models for 3D printing. I built one 3 years ago and it is still running with one pair of AA batteries, MySensors and Arduino Pro Mini.
Last year I needed some adjustments and adaptations for friends so I got inspired and remodeled the rain gauge for 3Dprinter.
Maybe it could be usefull for someone so I decided to share it here (https://www.prusaprinters.org/prints/130513-rain-gauge)

@zookazim From your openhab.log it seems that the sensor is sending messages with nodeId=1, but in your mysensors.things you mapped humidity and temperature channels to nodeId=101