gsm + hlavice
http://www.ebay.com/itm/201534882986?_trksid=p2055 119.m1438.l2649&var=500727225155&ssPageName=STRK%3 AMEBIDX%3AIT
http://proinstalatera.cz/elektrobock-seh01-nc-term oelektricky-pohon-seh30-23-0030/
nebo misto gsm to arduino+ethernet+rele:
http://www.ebay.com/itm/142178446918?_trksid=p2055 119.m1438.l2649&var=441245154998&ssPageName=STRK%3 AMEBIDX%3AIT
http://www.ebay.com/itm/ENC28J60-Ethernet-Shield-F or-Arduino-Nano-V3-0-RJ45-Webserver-Module-MO-/152 480095466?hash=item2380859cea:g:AzAAAOSwdGFY0NwQ
http://www.ebay.com/itm/5V-4-Channel-Relay-Module- for-Arduino-PIC-ARM-DSP-AVR-Electronic-NEW-/272563 908011?hash=item3f76132dab:g:UFcAAOSwnHZYmZWY
tady je pak návod jak to sestavit:
http://www.instructables.com/id/Ethernet-Switching -with-Arduino/?ALLSTEPS
Nebo si napsat/najít jinou vhodnější variantu.