About: http://webisa.webdatacommons.org/440807188

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	I have built the device exactly as you describe it. (not with RFID) Here is a complete how to guide I made for this project.
http://www.w3.org/ns/prov#wasQuotedFrom	arduino.cc