/* * Author: Jon Trulson * Copyright (c) 2016 Intel Corporation. * * This program and the accompanying materials are made available under the * terms of the The MIT License which is available at * https://opensource.org/licenses/MIT. * * SPDX-License-Identifier: MIT */ #include #include #include "dfrorp.h" #include "upm_utilities.h" bool shouldRun = true; void sig_handler(int signo) { if (signo == SIGINT) shouldRun = false; } int main() { signal(SIGINT, sig_handler); //! [Interesting] // Instantiate a DFRobot ORP sensor on analog pin A0 with an analog // reference voltage of 5.0. dfrorp_context sensor = dfrorp_init(0, 5.0); if (!sensor) { printf("dfrorp_init() failed.\n"); return(1); } // 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 // dfrorp_set_orp_cal_offset(). 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. dfrorp_set_calibration_offset(sensor, 0.97); // Every second, update and print values while (shouldRun) { dfrorp_update(sensor); printf("ORP = %f mV\n", dfrorp_get_orp(sensor)); upm_delay(1); } //! [Interesting] printf("Exiting...\n"); dfrorp_close(sensor); return 0; }