Quantity   Component name
1 × ESP8266-01 http://www.amazon.com/Diymall-Esp8266-Serial-Wireless-Transceiver/dp/B00O34AGSU/ref=sr_1_1?ie=UTF8&qid=1427301127&sr=8-1&keywords=esp8266+wifi+module
1 × 4-channel Relay board.
1 × 3.3v Power Supply
1 × 3.3v USB<->TTL converter / OR HC-05 BT Module
1 × 12v Solenoid controlled water valve. http://www.amazon.com/gp/product/B007R9U9BM/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1