#define ECHO_PIN 2
#define TRIG_PIN 15
#define LED1 21
#define LED2 19
#define LED3 18
#define LED4 5
#define BZR 22
void setup() {
Serial.begin(115200);
pinMode(LED_BUILTIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
pinMode(TRIG_PIN, OUTPUT);
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(LED3, OUTPUT);
pinMode(LED4, OUTPUT);
pinMode(BZR, OUTPUT);
}
float readDistanceCM() {
digitalWrite(TRIG_PIN, LOW);
delayMicroseconds(2);
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);
int duration = pulseIn(ECHO_PIN, HIGH);
return duration * 0.034 / 2;
}
void loop() {
float distance = readDistanceCM();
Serial.print("Jarak : ");
Serial.println(readDistanceCM());
digitalWrite(LED1, LOW);
digitalWrite(LED2, LOW);
digitalWrite(LED3, LOW);
digitalWrite(LED4, LOW);
digitalWrite(BZR, LOW);
if(distance>=50 && distance<100){
digitalWrite(LED1, HIGH);
} else if(distance>=100 && distance<200){
digitalWrite(LED1, HIGH);
digitalWrite(LED2, HIGH);
} else if(distance>=200 && distance<300){
digitalWrite(LED1, HIGH);
digitalWrite(LED2, HIGH);
digitalWrite(LED3, HIGH);
}else if(distance>=300 && distance<400){
digitalWrite(LED1, HIGH);
digitalWrite(LED2, HIGH);
digitalWrite(LED3, HIGH);
digitalWrite(LED4, HIGH);
digitalWrite(BZR, HIGH);
} else {
digitalWrite(LED1, LOW);
digitalWrite(LED2, LOW);
digitalWrite(LED3, LOW);
digitalWrite(LED4, LOW);
digitalWrite(BZR, LOW);
}
}