156 lines
4.2 KiB
C++
156 lines
4.2 KiB
C++
#include <Arduino.h>
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#include <SensirionI2CSen44.h>
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#include <Wire.h>
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#include <LiquidCrystal.h>
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SensirionI2CSen44 sen44;
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// initialize the library with the numbers of the interface pins
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LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
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const int buttonPin = 6;
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float heatIndex(float t, float rh) {
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float hi = 0.0;
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if (t <= 40.0)
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hi = t;
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else {
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float hitemp = 61.0 + ((t - 68.0) * 1.2) + (rh * 0.094);
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float hifinal = 0.5 * (t + hitemp);
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hi = -42.379 + 2.04901523 * t + 10.14333127 * rh - 0.22475541 * t * rh -
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6.83783 * (pow(10, -3)) * (pow(t, 2)) -
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5.481717 * (pow(10, -2)) * (pow(rh, 2)) +
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1.22874 * (pow(10, -3)) * (pow(t, 2)) * rh +
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8.5282 * (pow(10, -4)) * t * (pow(rh, 2)) -
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1.99 * (pow(10, -6)) * (pow(t, 2)) * (pow(rh, 2));
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if (hifinal > 79.0) {
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if ((rh <= 13) && (t >= 80.0) && (t <= 112.0))
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hi = hi - ((13.0 - rh) / 4.0) * sqrt((17.0 - fabs(t - 95.0)) / 17.0);
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else if ((rh > 85.0) && (t >= 80.0) && (t <= 87.0))
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hi = hi + ((rh - 85.0) / 10.0) * ((87.0 - t) / 5.0);
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} else
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hi = hifinal;
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}
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return hi;
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}
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float celsiusToFahrenheit(float degrees) {
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return degrees * 1.8 + 32;
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}
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void setup() {
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Serial.begin(115200);
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while (!Serial) {
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delay(100);
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}
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// set up the LCD's number of columns and rows:
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lcd.begin(16, 2);
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// set up the button pin
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pinMode(buttonPin, INPUT_PULLUP);
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Wire.begin();
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uint16_t error;
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char errorMessage[256];
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sen44.begin(Wire);
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error = sen44.deviceReset();
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if (error) {
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Serial.print("Error trying to execute getSerialNumber(): ");
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errorToString(error, errorMessage, 256);
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Serial.println(errorMessage);
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}
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// Start Measurement
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error = sen44.startMeasurement();
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if (error) {
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Serial.print("Error trying to execute startMeasurement(): ");
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errorToString(error, errorMessage, 256);
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Serial.println(errorMessage);
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}
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// Clean Fan
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sen44.startFanCleaning();
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}
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void loop() {
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uint16_t error;
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char errorMessage[256];
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delay(1000);
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// Read Measurement
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uint16_t massConcentrationPm1p0;
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uint16_t massConcentrationPm2p5;
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uint16_t massConcentrationPm4p0;
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uint16_t massConcentrationPm10p0;
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float vocIndex;
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float ambientHumidity;
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float ambientTemperature;
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float feelsLikeTemperature;
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error = sen44.readMeasuredMassConcentrationAndAmbientValues(
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massConcentrationPm1p0, massConcentrationPm2p5, massConcentrationPm4p0,
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massConcentrationPm10p0, vocIndex, ambientHumidity, ambientTemperature);
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if (error) {
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Serial.print("Error trying to execute "
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"readMeasuredMassConcentrationAndAmbientValues(): ");
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errorToString(error, errorMessage, 256);
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Serial.println(errorMessage);
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return;
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}
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ambientTemperature = celsiusToFahrenheit(ambientTemperature);
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feelsLikeTemperature = heatIndex(ambientTemperature, ambientHumidity);
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lcd.clear();
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if (digitalRead(buttonPin) == LOW) {
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lcd.setCursor(0, 0);
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lcd.print("1:");
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lcd.print(massConcentrationPm1p0);
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lcd.setCursor(8, 0);
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lcd.print("2:");
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lcd.print(massConcentrationPm2p5);
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lcd.setCursor(0, 1);
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lcd.print("4:");
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lcd.print(massConcentrationPm4p0);
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lcd.setCursor(8, 1);
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lcd.print("10:");
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lcd.print(massConcentrationPm10p0);
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} else {
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lcd.setCursor(0, 0);
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lcd.print("t:");
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lcd.print(round(ambientTemperature));
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lcd.setCursor(8, 0);
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lcd.print("h:");
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lcd.print(round(ambientHumidity));
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lcd.setCursor(0, 1);
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lcd.print("f:");
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lcd.print(round(feelsLikeTemperature));
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lcd.setCursor(8, 1);
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lcd.print("v:");
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lcd.print(vocIndex, 0);
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}
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//Serial.println("------------");
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//Serial.print("Voc:");
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//Serial.println(vocIndex);
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//Serial.print("Humidity:");
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//Serial.println(ambientHumidity);
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//Serial.print("Temperature:");
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//Serial.println(ambientTemperature);
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//Serial.print("Heat:");
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//Serial.println(feelsLikeTemperature);
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//Serial.println("------------");
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}
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