I have here a 315MHz RF transmitter/receiver pair which I'm having a bit of trouble to get up and running.
So, the setup:
The arduino outputs a sequential counter every 500ms over the serial port at 2400bps, which can be read just fine if connected directly to my Mac over USB. It also works if I use an FTDI breakout board instead of the built in USB chip on the Arduino (arduino TX/Pin1 to the breakout RX, arduino GND to the breakout GND).
Now I hook up the RF transmitter to the Arduino (TX/Pin1 to the transmitter DATA, 5V and GND to the transmitter VCC and GND).
Then, I hook up the receiver to the FTDI breakout (5V and GND from the breakout to the 5V and GND pins on the receiver, and the receiver's DATA pin to the breakout RX).
But I get nothing on the Mac. The breakout RX LED doesn't blink, ever.
To see if the receiver was getting anything, I connected the DATA pin to a LED, and it blinks very faintly. I assume this means it is getting data from the transmitter, since the blinking stops if I turn off the arduino.
I just don't understand how the FTDI breakout board doesn't see any data coming in. Am I missing something?
Any help would be appreciated, thanks. :)
RF transmitter: http://www.sparkfun.com/commerce/product_info.php?products_id=8947 RF Receiver: http://www.sparkfun.com/commerce/product_info.php?products_id=8945 FTDI 5V breakout: http://www.sparkfun.com/commerce/product_info.php?products_id=9115