75 lines
3.1 KiB
Python
75 lines
3.1 KiB
Python
#!/usr/bin/env python3
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#
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# The GrovePi connects the Raspberry Pi and Grove sensors. You can learn more about GrovePi here: http://www.dexterindustries.com/GrovePi
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#
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# Have a question about this example? Ask on the forums here: http://forum.dexterindustries.com/c/grovepi
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#
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'''
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## License
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The MIT License (MIT)
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GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
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Copyright (C) 2017 Dexter Industries
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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'''
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import grove_rflink433mhz
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import sys
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# Don't forget to run it with Python 3 !!
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# Don't forget to run it with Python 3 !!
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# Don't forget to run it with Python 3 !!
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def Main():
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# instantiate a RFLinker object
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# default arguments are
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# port = '/dev/ttyS0' -> you've got only one on each raspberry
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# chunk_size = 32 -> the max number of data bytes you can send per fragment - you can ignore it
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# max_bad_readings = 32 -> the number of bad characters read before giving up on a read operation
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# keep in mind that there is environment pollution, so the RF module will get many fake 'transmissions'
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receiver = grove_rflink433mhz.RFLinker()
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message_received = ""
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# do this indefinitely
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while True:
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# receive the message
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# readMessage takes a default argument
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# called retries = 20
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# it specifies how many times it tries to read consistent data before giving up
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# you should not modify it unless you know what you're doing and provided you also
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# modify the chunk_size for the transmitter
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message_received = receiver.readMessage()
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if len(message_received) > 0:
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# if the string has something then print it
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print('[message received][{}]'.format(message_received))
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else:
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print("[message_received][none or couldn't parse it]")
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if __name__ == "__main__":
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try:
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# it's the above function we call
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Main()
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# in case CTRL-C / CTRL-D keys are pressed (or anything else that might interrupt)
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except KeyboardInterrupt:
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print('[Keyboard interrupted]')
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sys.exit(0)
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