The Forth driver for the RFM69 on the JeeNode Zero is in flib/spi/rf69.fs. It is normally included in core.fs and therefore always available from flash memory. It’s very simple to use: call rf-init to intitialise the RFM69 module, and then call either rf-recv to poll for new incoming packets or rf-send to send out a single packet. The current driver does not use any interrupt pins, so only the RFM69’s 4 SPI pins plus power need to be hooked up.
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