int led = 13; int red= 12; int green = 11;
int sensor = 2; int smoke = A0; int buzzer = 9; int state = LOW; int val = 0; int tres =400; void setup() { pinMode(led, OUTPUT); pinMode(sensor, INPUT); pinMode(smoke, INPUT); pinMode(red, OUTPUT); pinMode(green, OUTPUT); pinMode(buzzer, OUTPUT); Serial.begin(9600); } void loop(){ int analogSensor= analogRead(smoke); Serial.print("Pin A0: "); Serial.println(analogSensor); val = digitalRead(sensor); if (val == HIGH) { digitalWrite(led, HIGH); delay(100); if (state == LOW) { Serial.println("Motion detected!"); state = HIGH; } } else { digitalWrite(led, LOW); delay(200); if (state == HIGH){ Serial.println("Motion stopped!"); state = LOW; } if (analogSensor > tres) { digitalWrite(red, HIGH); digitalWrite(green, LOW); tone(buzzer, 1000, 200); } else { digitalWrite(red, LOW); digitalWrite(green, HIGH); noTone(buzzer); } delay(100); } }