Digi XBee - Operation

Operation
WARNING! When operating at 1 W power output, observe a minimum separation
distance of 6 ft (2 m) between devices. Transmitting in close proximity of other devices
can damage the device's front end.
Serial interface 40
UART data flow 40
SPI communications 41
Serial buffers 42
UART flow control 43
Break control 44
Serial interface protocols 44
Modes of operation 47
XBee/XBee-PRO® S2C ZigBee® RF Module
39