This is an Arduino compatible shield to interface to the RFD900, long range radio modem.
If you need long range communications for your arduino project, this will make connecting the RFD900 to an arduino easy !
It has switchable serial source, from either the hardware serial port, or software serial.
It has the standard arduino form factor and uses only power, TX, RX and GND pins on the header.
Also available is a user selectable jumper to allow a separate power supply to the modem.
Image 3 of 3 shows a RFD900 modem mounted to a shield.
The RFD900 Shield requires a RFD900 modem which can be purchased separately.