#!/usr/bin/env 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_dfrorp as sensorObj def main(): # Instantiate a DFRobot ORP sensor on analog pin A0 with an analog # reference voltage of 5.0. sensor = sensorObj.DFRORP(0, 5.0) # To calibrate: # # Disconnect the sensor probe (but leave the sensor interface board # connected). Then run one of the examples while holding down the # 'calibrate' button on the device. Read the ORP value reported # (it should be fairly small). # # This value is what you should supply to setCalibrationOffset(). # Then reconnect the probe to the interface board and you should be # ready to go. # # DO NOT press the calibrate button on the interface board while # the probe is attached or you can permanently damage the probe. sensor.setCalibrationOffset(0.97); ## 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) # Every second, update and print values while (True): sensor.update() print("ORP:", sensor.getORP(), "mV") print() time.sleep(1) if __name__ == '__main__': main()