#define LED_PIN 2
#define BUZZER_PIN 4
#define SWITCH_PIN 12
void setup() {
pinMode(LED_PIN, OUTPUT);
pinMode(BUZZER_PIN, OUTPUT);
pinMode(SWITCH_PIN, INPUT_PULLUP);
Serial.begin(115200);
}
void loop() {
if(digitalRead(SWITCH_PIN) == HIGH)
{
digitalWrite(LED_PIN, HIGH);
tone(BUZZER_PIN,262);
Serial.println("Switch ON");
} else {
digitalWrite(LED_PIN, LOW);
noTone(BUZZER_PIN);

Serial.println("Switch OFF");
}
delay(100);
}