/*
  




*/

#define ECHO_PIN 10
#define TRIG_PIN 9
#define LEDMERAH 13
#define LEDKUNING 12
#define LEDHIJAU 11

void setup() {
  Serial.begin(115200);
pinMode(LED_BUILTIN, OUTPUT);
pinMode(TRIG_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
pinMode(LEDMERAH, OUTPUT);
pinMode(LEDKUNING, OUTPUT);  
pinMode(LEDHIJAU, 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 = 400 - readDistanceCM();

 if(distance >75)
{
   digitalWrite(LEDMERAH, HIGH);
  digitalWrite(LEDKUNING, LOW);
  digitalWrite(LEDHIJAU, LOW);
  Serial.println("awas banjir");
  Serial.println(F("tinggi genangan air="));
  Serial.print(distance);
 }
if(distance >25 && distance <75 )
{
  digitalWrite(LEDMERAH, LOW);
  digitalWrite(LEDKUNING, HIGH);
  digitalWrite(LEDHIJAU, LOW);
  Serial.println("waspada");
  Serial.println(F("tinggi genangan air="));
  Serial.print(distance);
  }
if(distance<25)
{
  digitalWrite(LEDMERAH, LOW);
  digitalWrite(LEDKUNING, LOW);
  digitalWrite(LEDHIJAU, HIGH);
  Serial.println("aman"); 
 }
 delay(1000);
}