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This module implements support for the DFRobot Laser PM2.5 Sensor. It connects to a UART at 9600 baud. This is the only baud rate supported. It optionally supports Reset and Set/Sleep gpios as well. Signed-off-by: Jon Trulson <jtrulson@ics.com>
63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
#!/usr/bin/python
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# Author: Jon Trulson <jtrulson@ics.com>
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# Copyright (c) 2016 Intel Corporation.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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import time, sys, signal, atexit
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import pyupm_hka5 as sensorObj
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# Instantiate a HKA5 sensor on uart 0. We don't use the set or
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# reset pins, so we pass -1 for them.
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sensor = sensorObj.HKA5(0, -1, -1)
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## Exit handlers ##
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# This function stops python from printing a stacktrace when you hit control-C
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def SIGINTHandler(signum, frame):
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raise SystemExit
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# This function lets you run code on exit
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def exitHandler():
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print "Exiting"
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sys.exit(0)
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# Register exit handlers
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atexit.register(exitHandler)
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signal.signal(signal.SIGINT, SIGINTHandler)
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# update once every 2 seconds and output data
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while (True):
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sensor.update()
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print "PM 1 :",
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print sensor.getPM1(),
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print " ug/m3"
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print "PM 2.5:",
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print sensor.getPM2_5(),
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print " ug/m3"
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print "PM 10 :",
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print sensor.getPM10(),
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print " ug/m3"
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print
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time.sleep(2)
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