# The frequency must be identical in the emitter and the receiver (eg: 433.1 MHz in this example).
# The frequency must be identical in the emitter and the receiver (eg: 433.1 MHz in this example).
# The encryption key must be identical on the both side.
# The encryption key must be identical on the both side.
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== Installing the RFM69 library ==
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If not done yet, we will have to copy the RFM69 MicroPython library on your MicroPython board.
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That library support lot of RFM modules including our RFM69HCW.
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[https://github.com/adafruit/RadioHead Adafruit did fork the RadioHead library] and add some useful sample, so we will install the small|Adafruit's RadioHead forked library.