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91 lines
3.2 KiB
Python
91 lines
3.2 KiB
Python
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#!/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_t3311 as sensorObj
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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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defaultDev = "/dev/ttyUSB0"
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# if an argument was specified, use it as the device instead
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if (len(sys.argv) > 1):
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defaultDev = sys.argv[1]
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print "Initializing..."
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# Instantiate an T3311 instance, using MODBUS slave address 1, and
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# default comm parameters (9600, 8, N, 2)
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sensor = sensorObj.T3311(defaultDev, 1)
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# output the serial number and firmware revision
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print "Serial Number:", sensor.getSerialNumber()
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print "Firmware Revision: {0}.{1}".format(sensor.getFirmwareMajor(),
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sensor.getFirmwareMinor())
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print
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# update and print available values every second
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while (1):
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# update our values from the sensor
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sensor.update()
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# we show both C and F for temperature
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print "Temperature:", sensor.getTemperature(), "C /",
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print sensor.getTemperature(True), "F"
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print "Humidity:", sensor.getHumidity(), "%"
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# this value depends on the sensor configuration -- by default
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# it is the dew point temperature
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print "Computed Value:", sensor.getComputedValue()
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# with FW revisions > 2.44, extended computed data is available
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if (sensor.extendedDataAvailable()):
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print "Dew Point Temperature:", sensor.getDewPointTemperature(),
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print "C /", sensor.getDewPointTemperature(True), "F"
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print "Absolute Humidity:", sensor.getAbsoluteHumidity(), "g/m3"
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print "Specific Humidity:", sensor.getSpecificHumidity(),
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print "g/kg"
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print "Mixing Ratio:", sensor.getMixingRatio(), "g/kg"
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print "Specific Enthalpy:", sensor.getSpecificEnthalpy(),
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print "kJ/kg"
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print
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time.sleep(1)
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