Arduino/Seeduino RFD900 Shield
If you need long range communications for your project, this will make connecting the RFD900 to a Seeduino stalker, or similar, easy !
An on board regulator allows direct supply from a 12V battery, or up to a 4S lithium pack.
Shutdown / RTC pins also allow complete shutdown when interfaced with a Seeduino stalker board.
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.