cheap, easy to use, receive and send module in ISM 433 MHz, and also work with arduino!
Arduino Ethernet ENC28J60
The Arduino Ethernet is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins, 6 analog inputs, a 16 MHz crystal oscillator, a RJ45 connection, a…
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RF24L01B low power wireless module, use NRF24L01 chip from Nordic, 2.4G lisence-free ISM band, highest working data speed is 2Mbps,
SS-101A PIR sensor