#define ECHO_PIN 10
#define TRIG_PIN 11

void setup() {
  // put your setup code here, to run once:
Serial.begin(115200);
pinMode(LED_BUILTIN, OUTPUT);
pinMode(TRIG_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
}
float readDistanceCH() {
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() {
  // put your main code here, to run repeatedly:
digitalWrite(TRIG_PIN, LOW );
delayMicroseconds(2);
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);
int duration = pulseIn(ECHO_PIN, HIGH);
float distance = duration *0.34 / 2;


Serial.print("Jarak:");
Serial.println(distance);

delay(100);
}}