46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
# SPDX-FileCopyrightText: 2020 Jerry Needell for Adafruit Industries
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# SPDX-License-Identifier: MIT
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# Example to send a packet periodically
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import board
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import busio
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import digitalio
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from adafruit_rfm import rfm69
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# Define radio parameters.
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RADIO_FREQ_MHZ = 915.0 # Frequency of the radio in Mhz. Must match your
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# module! Can be a value like 915.0, 433.0, etc.
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# Define pins connected to the chip, use these if wiring up the breakout according to the guide:
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CS = digitalio.DigitalInOut(board.CE1)
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RESET = digitalio.DigitalInOut(board.D25)
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# Initialize SPI bus.
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spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
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# Initialze RFM radio
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rfm69 = rfm69.RFM69(spi, CS, RESET, RADIO_FREQ_MHZ)
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# set the time interval (seconds) for sending packets
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rfm69.radiohead = False
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# Optionally set an encryption key (16 byte AES key). MUST match both
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# on the transmitter and receiver (or be set to None to disable/the default).
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rfm69.encryption_key = None
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# rfm69.encryption_key = (
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# b"\x01\x02\x03\x04\x05\x06\x07\x08\x01\x02\x03\x04\x05\x06\x07\x08"
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# )
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# Wait to receive packets.
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print("Waiting for packets...")
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# initialize flag and timer
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while True:
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# Look for a new packet - wait up to 5 seconds:
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packet = rfm69.receive(timeout=2.0)
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# If no packet was received during the timeout then None is returned.
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if packet is not None:
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# Received a packet!
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# Print out the raw bytes of the packet:
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print("Received (raw header):", [hex(x) for x in packet[0:]])
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print(f"RSSI: {rfm69.last_rssi}")
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