Quantity   Component name
2 × Arduino Duemilanove/UNO or compatibles Any Arduino compatible board that use ATmega328P or higher
2 × Transceiver W5100, ENC28J60, nRF24L01+, AT86RF230 and others
1 × Relay with embedd driver Or an Arduino boards with relay, like DINov2
1 × Pushbutton and resistors