#!/usr/bin/python # Author: Jon Trulson # Copyright (c) 2016 Intel Corporation. # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so, subject to # the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. from __future__ import print_function import time, sys, signal, atexit from upm import pyupm_t3311 as sensorObj def main(): ## Exit handlers ## # This function stops python from printing a stacktrace when you hit control-C def SIGINTHandler(signum, frame): raise SystemExit # This function lets you run code on exit def exitHandler(): print("Exiting") sys.exit(0) # Register exit handlers atexit.register(exitHandler) signal.signal(signal.SIGINT, SIGINTHandler) defaultDev = "/dev/ttyUSB0" # if an argument was specified, use it as the device instead if (len(sys.argv) > 1): defaultDev = sys.argv[1] print("Initializing...") # Instantiate an T3311 instance, using MODBUS slave address 1, and # default comm parameters (9600, 8, N, 2) sensor = sensorObj.T3311(defaultDev, 1) # output the serial number and firmware revision print("Serial Number:", sensor.getSerialNumber()) print("Firmware Revision: {0}.{1}".format(sensor.getFirmwareMajor(), sensor.getFirmwareMinor())) print() # update and print available values every second while (1): # update our values from the sensor sensor.update() # we show both C and F for temperature print("Temperature:", sensor.getTemperature(), "C /", end=' ') print(sensor.getTemperature(True), "F") print("Humidity:", sensor.getHumidity(), "%") # this value depends on the sensor configuration -- by default # it is the dew point temperature print("Computed Value:", sensor.getComputedValue()) # with FW revisions > 2.44, extended computed data is available if (sensor.extendedDataAvailable()): print("Dew Point Temperature:", sensor.getDewPointTemperature(), end=' ') print("C /", sensor.getDewPointTemperature(True), "F") print("Absolute Humidity:", sensor.getAbsoluteHumidity(), "g/m3") print("Specific Humidity:", sensor.getSpecificHumidity(), end=' ') print("g/kg") print("Mixing Ratio:", sensor.getMixingRatio(), "g/kg") print("Specific Enthalpy:", sensor.getSpecificEnthalpy(), end=' ') print("kJ/kg") print() time.sleep(1) if __name__ == '__main__': main()