Oleksandra Ryshniak Portfolio

// Meloodiate mängimine.

// Käsk Arduino tone() - noote tihedus.

// Noodid:

// note 	frequency

// c     262 Hz

// d     294 Hz

// e     330 Hz

// f     349 Hz

// g     392 Hz

// a     440 Hz

// b     494 Hz

// C     523 Hz

const int buzzerPin = 9;

// pikkus on nootide ja pausite koguste summa

const int songLength = 18;

char notes[] = "cdfda ag cdfdg gf "; // tähed on noodid ja tühik on paus

// Rütmi seadistamine.

int beats[] = {1,1,1,1,1,1,4,4,2,1,1,1,1,1,1,4,4,2};

// "tempo" meloodia kiirus. Kui väiksem tempo_ siis suurem kiirus.

int tempo = 150;

void setup()
{
  pinMode(buzzerPin, OUTPUT);
}
void loop()
{
  int i, duration;
  for (i = 0; i < songLength; i++)
  {
	duration = beats[i]*tempo;
	if (notes[i] == ' ')
   {
     delay(duration);
   }
   else
   {
     tone(buzzerPin, frequency(notes[i]), duration);
     delay(duration);
    }
    		delay(tempo/10);
          }
          while(true){}
          }
          int frequency(char note)
          {
            int i;
            const int numNotes = 8;
            char names[] = {'c', 'd', 'e', 'f', 'g', 'a', 'b', 'c'};
            int frequencies[] = {262, 294, 330, 349, 392, 440, 494, 523};
            for (i = 0; i < numNotes; i++)
            {
              if (names[i] == note)
              {
                return(frequencies[i]);
              }
            }
            return(0);
          }
          

#include <DHT.h>

#define DHTPIN 2        // signaal Arduino D2-s
#define DHTTYPE DHT22   // määrame õigeks tüübiks DHT22

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
…
  Serial.print("Temperatuur: ");
  Serial.print(temp);
  Serial.print(" °C | Niiskus: ");
  Serial.print(hum);
  Serial.println(" %");

  delay(2000);
}

#include <LiquidCrystal.h>

const int buzzerPin = 9;
const int tempPin = A1;
const int lightPin = A0;
const int switchPin = A2;

LiquidCrystal lcd(12, 11, 5, 4, 3, 2); 

bool systemOn = false;

void setup() {
  lcd.begin(16, 2);  
  pinMode(buzzerPin, OUTPUT);
  Serial.begin(9600);

  
  lcd.setCursor(0, 0);
  lcd.print("LCD Initialized");  
  delay(2000);  
  lcd.clear();  
}

void loop() {
  int controlValue = analogRead(switchPin);

  systemOn = controlValue > 700;

  if (systemOn) {
    float voltage = getVoltage(tempPin);
    float degreesC = (voltage - 0.5) * 100.0;  
    int lightLevel = analogRead(lightPin);

  
    lcd.display(); 
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Temp: ");
    lcd.print((int)degreesC);
    lcd.print("C");

    lcd.setCursor(0, 1);
    lcd.print("Light: ");
    lcd.print(lightLevel);

    Serial.print("Temp: ");
    Serial.print(degreesC);
    Serial.print(" C  Light: ");
    Serial.println(lightLevel);

    
    if (degreesC > 30) {
      alarmMode("Alert! Temp too high!");
    } else if (lightLevel > 500) {  
      alarmMode("Alert! Too dark!");
    } else {
      normalMode();  
    }

  } else {

    lcd.noDisplay(); 
    noTone(buzzerPin);  
  }

  delay(1000);
}


void alarmMode(String message) {
  lcd.display();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(message);
  playSOS();  
}

void normalMode() {
  noTone(buzzerPin); 
}

void playSOS() {
  int freq = 1000;
  int shortDur = 200;
  int longDur = 600;
  int pause = 200;

  for (int i = 0; i < 3; i++) { 
    tone(buzzerPin, freq);
    delay(shortDur);
    noTone(buzzerPin);
    delay(pause);
    tone(buzzerPin, freq);
    delay(longDur);
    noTone(buzzerPin);
    delay(pause);
    tone(buzzerPin, freq);
    delay(shortDur);
    noTone(buzzerPin);
    delay(pause);
  }
}

float getVoltage(int pin) {
  return analogRead(pin) * 0.004882814;  
}