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This module implements support for the DFRobot EC (Electrical Conductivity) meter. It relies on the use of the DS18B20 UPM C module for temperature gathering. It has a pretty complicated calibration procedure which is somewhat documented on the DFRobot wiki. Functions have been added to support changing the various coefficients as desired. Signed-off-by: Jon Trulson <jtrulson@ics.com>
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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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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*/
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#include <unistd.h>
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#include <signal.h>
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#include "dfrec.h"
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bool shouldRun = true;
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void sig_handler(int signo)
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{
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if (signo == SIGINT)
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shouldRun = false;
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}
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int main()
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{
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signal(SIGINT, sig_handler);
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//! [Interesting]
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// Instantiate a DFRobot EC sensor on analog pin A0, with a ds18b20
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// temperature sensor connected to UART 0, and a device index (for
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// the ds1820b uart bus) of 0, and an analog reference voltage of
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// 5.0.
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dfrec_context sensor = dfrec_init(0, 0, 0, 5.0);
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if (!sensor)
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{
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printf("dfrec_init() failed.\n");
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return(1);
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}
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// Every 2 seconds, update and print values
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while (shouldRun)
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{
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dfrec_update(sensor);
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printf("EC = %f ms/cm\n", dfrec_get_ec(sensor));
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printf("Volts = %f, Temperature = %f C\n",
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dfrec_get_volts(sensor), dfrec_get_temperature(sensor));
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printf("\n");
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sleep(2);
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}
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//! [Interesting]
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printf("Exiting...\n");
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dfrec_close(sensor);
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return 0;
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}
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