#include <DHT.h>
#include <LedControl.h>

#define DHTPIN 2
#define DHTTYPE DHT22
#define buzzerPin 8

DHT dht(DHTPIN, DHTTYPE);

// Initialize the LED matrix (Pin 12: Data, Pin 11: Clock, Pin 10: Load/CS)
LedControl lc = LedControl(12, 11, 10, 1);

void setup() {
  Serial.begin(9600);
  dht.begin();
  lc.shutdown(0, false);
  lc.setIntensity(0, 8);
  lc.clearDisplay(0);
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  delay(2000);
  
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  if (isnan(humidity) || isnan(temperature)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%  Temperature: "));
  Serial.print(temperature);
  Serial.println(F("°C"));

  displayNumber(int(temperature));  // Display temperature on the LED matrix

  if (temperature > 30) {  // Sound buzzer if temperature is above 30°C
    tone(buzzerPin, 1000);  // Generate a tone at 1000 Hz
    delay(100);
    noTone(buzzerPin);
  }
}

void displayNumber(int num) {
  lc.clearDisplay(0);
  lc.setDigit(0, 1, (num / 10) % 10, false);
  lc.setDigit(0, 0, num % 10, false);
}