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65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/*
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* Author: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* This program and the accompanying materials are made available under the
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* terms of the The MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <iostream>
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#include <stdint.h>
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#include <stdio.h>
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#include <string>
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#include "tp401.hpp"
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#include "upm_utilities.h"
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using namespace std;
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//! [Interesting]
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// Give a qualitative meaning to the value from the sensor
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std::string
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airQuality(uint16_t value)
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{
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if (value < 50)
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return "Fresh Air";
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if (value < 200)
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return "Normal Indoor Air";
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if (value < 400)
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return "Low Pollution";
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if (value < 600)
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return "High Pollution - Action Recommended";
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return "Very High Pollution - Take Action Immediately";
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}
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int
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main()
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{
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upm::TP401 airSensor(0);
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cout << airSensor.name() << endl;
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fprintf(stdout, "Heating sensor for 3 minutes...\n");
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// wait 3 minutes for sensor to warm up
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for (int i = 0; i < 3; i++) {
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if (i) {
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fprintf(stdout, "Please wait, %d minute(s) passed..\n", i);
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}
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upm_delay(60);
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}
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fprintf(stdout, "Sensor ready!\n");
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while (true) {
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uint16_t value = airSensor.getSample(); // Read raw value
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float ppm = airSensor.getPPM(); // Read CO ppm (can vary slightly from previous read)
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fprintf(stdout, "raw: %4d ppm: %5.2f %s\n", value, ppm, airQuality(value).c_str());
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upm_delay_us(2500000); // Sleep for 2.5s
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}
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return 0;
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}
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//! [Interesting]
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