Arduino RFD900 Shield

Arduino RFD900 Shield

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.

The RFD900 Shield a has switchable serial source, from either the hardware serial port, or software serial. Shutdown / RTC pins also allow complete shutdown when interfaced with a Seeduino stalker board.

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.

Absolute Maximum Ratings

Recommended Operating Conditions

RFD900 Sheild Pin Configuration

Modes of Operation

• The interrupt (INT0) from the RTC chip is active low therefore it should be pulled low in order to turn ON voltage regulator.
• The REG_ENABLE pin, which is an I/O on the ATMega328P is active high and it is used to turn the voltage regulator ON or OFF. As long as the REG_ENABLE pin is high, the voltage regulator will be turned ON.
• The SWITCHED_VOL_ENABLE pin, which is an I/O on the ATMega328P is active high and it is used to turn the Switched Voltage Output ON or OFF.
• The RFD900_SWITCH pin, which is an I/O on the ATMega328P is active high and it is used to turn the RFD900 ON or OFF.
• IGN is a pin that takes in an external voltage which is used to turn on the voltage regulator at anytime, and as long at this input voltage is greater than 1.5V, the voltage regulator will be in the ON mode.