#define ECHO_PIN 10
#define TRIG_PIN 9
#define pinledMerah 13
#define pinledHijau 12
#define pinledKuning 11

void setup(){
  Serial. begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT) ;
  pinMode(pinledMerah, OUTPUT);
  pinMode(pinledHijau, OUTPUT);
  pinMode(pinledKuning, OUTPUT);
}
float bacasensorjarak(){
  digitalWrite(TRIG_PIN, LOW );
  delayMicroseconds(3);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(7);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn (ECHO_PIN, HIGH);
  return duration *0.0344/2;
}
void loop (){
  if(bacasensorjarak() >300  ){
    digitalWrite(pinledMerah, LOW);
    digitalWrite(pinledKuning, LOW);
    digitalWrite(pinledHijau, HIGH);
    Serial.println(" JarakHalangan " + (String(bacasensorjarak())));
    Serial.println("Air Dangkal");
  }
  else if(bacasensorjarak() > 150 ){
    digitalWrite(pinledMerah, LOW);
    digitalWrite(pinledKuning, HIGH);
    digitalWrite(pinledHijau, LOW);
    Serial.println(" JarakHalangan "  + (String(bacasensorjarak())));
    Serial.println(" Air sedang");

} else if(bacasensorjarak() > 300 < 400 ){
    digitalWrite(pinledMerah, HIGH);
    digitalWrite(pinledKuning, LOW);
    digitalWrite(pinledHijau, LOW);
    Serial.println(" JarakHalangan "  + (String(bacasensorjarak())));
    Serial.println("Air Dalam"); }

    delay(100);
}