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October 21, 2015
Tutorial - SparkFun SAMD21 Pro RF Hookup Guide
about 9 months ago
Note: VDDCORE is tied to 3.3V on this board, which causes it to use too much current (~60mA awake, ~30mA asleep). Cut the trace from SAMD21G pin 43 to get much lower power usage (13mA awake, ~110uA sleep is achievable). SparkFun, if you revise the board, please fix this. Your other SAMD21 boards don't have VDDCORE pulled high.
It seems that the jumpers connect DIO1 and DIO2 to the microcontroller, which is needed for use with LoRaWAN libraries like LMIC. For point-to-point LoRa communication, like what's provided with RadioHead libraries, those are not needed. RadioHead is currently only configured for LoRa usage with this radio module (but not LoRaWAN, if I understand correctly). So either way, you will use LoRa, but connection to TTN for instance probably won't work without those jumpers closed.
Plug it in to your computer via USB and try quickly double-tapping the reset button if you haven't already, then see if your computer recognizes it.
Having issues getting this to work consistently with a SparkFun SAMD21 LoRa Pro RF board. Best case, it will run for several seconds, then the readings will freeze. Various settings of timing budget and intermeasurement period did not make a difference. Most of the time it doesn't make it past the first library function call in the setup function.
No public wish lists :(