I needed a 434Mhz radio shield for my PWS (SparkFun Weather Shield) and would work with an Arduino Pro 328 - 3.3V, so I made one. The first problem that I needed to overcome was the fact that the Weather Shield is using both of the Arduino Pro's IRQ pins for rain and wind measurements. Luckily for me, the RFM69 library that I am using allows for
RF69_IRQ_NUM to be set to alternative values, 4 and 2 respectively. I used a set of jumpers to select the IRQ pin - the shield can be used with other projects and still have an option of setting the IRQ for the RFM69CW radio.
1 / 2 • Parts before assembly