Well, In my project i must have a Software WEB (Java) that receive a information from Aurduino, this is information is the ID of Equipament (i.e: 1003) and a signal if this equipament is connected or disconnected (i.e: if a refrigerator is ON or OFF).
When my software web receive this signal saying that a particular equipament is "ON", the software starting a clock that will determine how much time this equipament was connected, until someone disconnect (turn off).
The problem is:
1 - I need a sensor to determine if a equipament is ON or OFF (i.e: refrigerator, air conditioning, television and others). Which sensor can i use for this propose ?
2 - I need a arduino connected in this sensor, that will receive information from sensor and send to SOFTWARE WEB. I need a protoboard to this connection between sensor and arduino ?
3 - My arduino must send the information received from sensor to my SOFTWARE WEB, how kind of Arduino Board i should buy to send this information through INTERNET ? (Better is Wireless, but if this arduino is very expensive i can use a Ethernet Cable just for test), so give the 2 models please.
4 - I imagine that i can't have a BIG KIT (Arduino + sensor + protobard) because this will be plugged in a JACK and should be as small as possible.