kopia lustrzana https://github.com/projecthorus/wenet
75 wiersze
2.4 KiB
Python
75 wiersze
2.4 KiB
Python
#!/usr/bin/env python
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#
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# RFM98W Initialisation for Wenet Telemetry
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#
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# Copyright (C) 2018 Mark Jessop <vk5qi@rfhead.net>
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# Released under GNU GPL v3 or later
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#
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# Requires pySX127x:
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# https://github.com/darksidelemm/pySX127x
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# Copy the SX127x directory into this directory...
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#
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# Uses spidev for comms with a RFM98W module.
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#
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# Note: As with the RFM22B version, all this script does
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# is get the RFM98W onto the right frequency, and into the right mode.
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#
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# SPI: Connected to CE0 (like most of my LoRa shields)
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# RPi TXD: Connected to RFM98W's DIO2 pin.
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#
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import sys
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import argparse
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from SX127x.LoRa import *
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from SX127x.hardware_piloragateway import HardwareInterface
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def setup_rfm98w(frequency=441.200, spi_device=0, shutdown=False):
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# Set this to 1 if your RFM98W is on CE1
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hw = HardwareInterface(spi_device)
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# Start talking to the module...
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lora = LoRa(hw)
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# Set us into FSK mode, and set continuous mode on
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lora.set_register(0x01,0x00) # Standby Mode
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# If we have been asked to shutdown the RFM98W, then exit here.
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if shutdown:
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sys.exit(0)
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# Otherwise, proceed.
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lora.set_register(0x31,0x00) # Set Continuous Mode
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# Set TX Frequency
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lora.set_freq(frequency)
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# Set Deviation (~70 kHz). Signals ends up looking a bit wider than the RFM22B version.
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lora.set_register(0x04,0x04)
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lora.set_register(0x05,0x99)
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# Set Transmit power to 50mW.
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# NOTE: If you're in another country you'll probably want to modify this value to something legal...
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lora.set_register(0x09,0x8F)
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# Go into TX mode.
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lora.set_register(0x01,0x02) # .. via FSTX mode (where the transmit frequency actually gets set)
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lora.set_register(0x01,0x03) # Now we're in TX mode...
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if __name__ == '__main__':
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parser = argparse.ArgumentParser()
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parser.add_argument("--frequency", default=441.200, type=float, help="Transmit Frequency (MHz). Default = 441.200 MHz.")
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parser.add_argument("--spidevice", default=0, type=int, help="LoRa SPI Device number. Default = 0.")
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parser.add_argument("--shutdown",action="store_true", help="Shutdown Transmitter instead of activating it.")
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args = parser.parse_args()
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tx_freq = args.frequency
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if tx_freq>450.0 or tx_freq<430.00:
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print("Frequency out of 70cm band, using default.")
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tx_freq = 441.200
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setup_rfm98w(frequency=tx_freq, spi_device=args.spidevice, shutdown=args.shutdown)
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sys.exit(0)
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