4 2013-02-13 www.fritzing.org The RFM22 is a low-power, low cost radio that is capable of operating in the 434MHz and 900MHz open bands. It's frequency is software defined and there are some very good libraries written for it. RFM22 RFM22 SMD RFM22-XXX-S2 rfm22-xxx-s2 sparkfun RF Radio RFM22 smd ANT

GND

GND

GND

GPIO0

GPIO1

GPIO2

NIRQ

NSEL

RXANT

SCLK

SDI

SDN

SDO

TXANT

VCC