변수 및 라이브러리 설정

#include
#include
#include

int ledState = LOW;

unsigned long previousMillis = 0;

const long intervalLong = 1000;
const long intervalMed = 500;
const long intervalShort = 100;

float old_temp = 0;
float old_hum = 0;

long sensorsum = 0;
int n = 1;
int mean = 0;
int lastmean = 0;

// buffer to read samples into, each sample is 16-bits
short sampleBuffer[256];

// number of samples read
volatile int samplesRead;

센서 셋업

// The setup routine runs once when you press reset:
void setup() {
  // Sets pin 13 for output in order to blink the LED:
  pinMode(13, OUTPUT);
  // Initialize serial communication at 9600 bits per second:
  Serial.begin(9600);

    if (!HTS.begin()) {
    Serial.println("Failed to initialize humidity temperature sensor!");
    while (1);
    }

     // configure the data receive callback
  PDM.onReceive(onPDMdata);

  // optionally set the gain, defaults to 20
  // PDM.setGain(30);

  // initialize PDM with:
  // - one channel (mono mode)
  // - a 16 kHz sample rate
  if (!PDM.begin(1, 16000)) {
    Serial.println("Failed to start PDM!");
    while (1);
  }

    if (!APDS.begin()) {
    Serial.println("Error initializing APDS9960 sensor!");
  }
}

주 센서 처리 루틴

// The loop routine runs over and over again forever:
void loop() {
  
  // Read the input on analog pin 0:
  int sensorValue = analogRead(A0);

  unsigned long currentMillis = millis();
      
  delay(250);

  
  // The "Mean" value will vary  the whole loop beacuse it isalways calculating the mean with the read values
  // The "Last Mean" value will only show the calculated mean value just to ease the reading of the calculated value
  Serial.print(" sensorValue = ");
  Serial.print(sensorValue);
  Serial.print(" Last Mean = ");
  Serial.println(lastmean);
  delay(25);

   // read all the sensor values
  float temperature = HTS.readTemperature();
  float humidity    = HTS.readHumidity();

  // check if the range values in temperature are bigger than 0,5 ºC
  // and if the range values in humidity are bigger than 1%
  if (abs(old_temp - temperature) >= 0.5 || abs(old_hum - humidity) >= 1 )
  {
    old_temp = temperature;
    old_hum = humidity;
    // print each of the sensor values
    Serial.print("Temperature = ");
    Serial.print(temperature);
    Serial.println(" °C");
    Serial.print("Humidity    = ");
    Serial.print(humidity);
    Serial.println(" %");
    Serial.println();
  }
    // print each of the sensor values
  Serial.print("Temperature = ");
  Serial.print(temperature);
  Serial.println(" °C");

  Serial.print("Humidity    = ");
  Serial.print(humidity);
  Serial.println(" %");

  // print an empty line
  Serial.println();

/*
  // wait for samples to be read
  if (samplesRead) {

    // print samples to the serial monitor or plotter
    for (int i = 0; i < samplesRead; i++) {
      Serial.println(sampleBuffer[i]);
      // check if the sound value is higher than 500
      if (sampleBuffer[i]>=500){
        digitalWrite(LEDR,LOW);
        digitalWrite(LEDG,HIGH);
        digitalWrite(LEDB,HIGH);
      }
      // check if the sound value is higher than 250 and lower than 500
      if (sampleBuffer[i]>=250 && sampleBuffer[i] < 500){
        digitalWrite(LEDB,LOW);
        digitalWrite(LEDR,HIGH);
        digitalWrite(LEDG,HIGH);
      }
      //check if the sound value is higher than 0 and lower than 250
      if (sampleBuffer[i]>=0 && sampleBuffer[i] < 250){
        digitalWrite(LEDG,LOW);
        digitalWrite(LEDR,HIGH);
        digitalWrite(LEDB,HIGH);
      }
    }
    // clear the read count
    samplesRead = 0;
  }
*/
  // check if a proximity reading is available
  if (APDS.proximityAvailable()) {
    // read the proximity
    // - 0   => close
    // - 255 => far
    // - -1  => error
    int proximity = APDS.readProximity();

    if (proximity > 150) {
      if (currentMillis - previousMillis >= intervalLong) {
        previousMillis = currentMillis;

        // if the LED is off turn it on and vice-versa:
        if (ledState == LOW) {
          ledState = HIGH;
        } else {
          ledState = LOW;
        }

        // set the green LED with the ledState of the variable and turn off the rest
        digitalWrite(LEDG, ledState);
        digitalWrite(LEDR, HIGH);
        digitalWrite(LEDB, HIGH);
      }
    }

    else if(proximity > 50 && proximity <= 150){
      if (currentMillis - previousMillis >= intervalMed) {
        previousMillis = currentMillis;

        // if the LED is off turn it on and vice-versa:
        if (ledState == LOW) {
          ledState = HIGH;
        } else {
          ledState = LOW;
        }

        // set the blue LED with the ledState of the variable and turn off the rest
        digitalWrite(LEDB, ledState);
        digitalWrite(LEDR, HIGH);
        digitalWrite(LEDG, HIGH);
      }
    }

    else {
      if (currentMillis - previousMillis >= intervalShort) {
        previousMillis = currentMillis;

        // if the LED is off turn it on and vice-versa:
        if (ledState == LOW) {
          ledState = HIGH;
        } else {
          ledState = LOW;
        }

        // set the blue LED with the ledState of the variable and turn off the rest
        digitalWrite(LEDR, ledState);
        digitalWrite(LEDB, HIGH);
        digitalWrite(LEDG, HIGH);
      }
    }

    // print value to the Serial Monitor
    Serial.println(proximity);
  } 
}

void onPDMdata() {
  // query the number of bytes available
  int bytesAvailable = PDM.available();

  // read into the sample buffer
  PDM.read(sampleBuffer, bytesAvailable);

  // 16-bit, 2 bytes per sample
  samplesRead = bytesAvailable / 2;
}