#include <TimerOne.h>
const int RED_PIN = 9;
const int GREEN_PIN = 10;
const int BLUE_PIN = 11;
const int BUZZER_PIN = 8;
const int GAS_SENSOR_PIN = A0;
const int ALARM_THRESHOLD = 1024 * 0.8;
bool mode = false;


void setup() {
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);
  Serial.begin(9600);
  Timer1.initialize(1500000);
  Timer1.attachInterrupt(buz);
}

int TMP_VALUE = -1;
void loop() {
  int sensorValue = analogRead(GAS_SENSOR_PIN);
  int normalizedValue = map(sensorValue, 210, 1010, 0, 1023);
  if (normalizedValue != TMP_VALUE)
  {
    Serial.print("Уровень  света: ");
    Serial.print(normalizedValue);
    Serial.print(" (");
    Serial.print(map(normalizedValue, 0, 1023, 0, 100));
    Serial.println("%)");
    TMP_VALUE = normalizedValue;
  }
  int color = map(normalizedValue, 0 , 1023, 0, 255);
  updateLED(color);

  if (normalizedValue > ALARM_THRESHOLD && mode==true) 
  {
    tone(BUZZER_PIN, 100, 200);
    delay(200);
    tone(BUZZER_PIN, 1000, 200);
    delay(200);
  } else 
  {
    noTone(BUZZER_PIN);
  }
}
void updateLED(int value) {
  int red = 255 - value;
  int green = value;
  int blue = 255;

  analogWrite(RED_PIN, red);
  analogWrite(GREEN_PIN, green);
  analogWrite(BLUE_PIN, blue);
}

void buz()
{
  mode = !mode;
}