Rain gauge with scetch https://www.mysensors.org/build/rain Edit: is it even possible to let the sketch work on an uno?

Thank you for your post. I also found this http://www.seeedstudio.com/forum/viewtopic.php?f=10&t=989&sid=bbe4d6f1ab9f050788e5fa5b41b46069 Can you check my picklist: Uno r3 W5100 Ethernet shield Breadboard Resistors Some cables Flowmeters Can I split the 5v from the uno r3 to the flowmeters?