/*
  HC-SR04 Ultrasonic Sensor Example.

  Turn the LED on .

  Copyright (C) 2022, fiqian arofi
*/


#define ECHO_PIN 2
#define TRIG_PIN 3

#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
//#include <Fonts/FreeSerif9pt7b.h>


#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

//* ultrasonik
int minimumRange = 00;
int maximumRange = 710 ;
long duration, distance ;

void setup() {
  
  Serial.begin(9600);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextColor(WHITE);
//display.setTextWrap(false);

     
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(8, OUTPUT);
}
void loop() {
  delay(1000); 
  //display.setFont(&FreeSerif9pt7b);
  display.clearDisplay();
  display.setTextSize(1);
  
  display.setCursor(0, 15);
 
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  distance = 800 - duration * 0.034 / 2; //* 800 adalah posisi elevasi ketinggian sensor diletakkan kira-kira 1 meter dari perm tanah

   if (distance >=681 || distance <=minimumRange) {
     display.setTextSize(1,1);
     display.setCursor(0,10);
   //Serial.print(F("Elevasi: "));
   //Serial.print(distance);
   //Serial.println(F("  cm")); 
   //Serial.println(F(" Siaga Banjir!!"));
   display.print(F("Elevasi: "));
   display.display();  
   display.print(distance);
   display.display();
   display.print(F(" cm"));
   display.display();  
   display.setTextSize(1,2);
   display.setCursor(0,30);
   display.println(F("  Siaga Banjir!!"));
   display.startscrollleft(0x03, 0x07);
   display.display();
  
}
   else {
     display.setTextSize(1);
     display.setCursor(0,8);
   //Serial.print("Elevasi: ");
   //Serial.print(distance);
   //Serial.println("  cm"); 
   if (distance <=680 && distance >= 620) { 

       //Serial.println(F("  Waspada Banjir dan Air Pasang!!"));

   display.print("Elevasi: ");
   display.display();  
   display.print(distance);
   display.display();
   display.print(" cm");
   display.display();  
   display.setCursor(20,25);
     display.setTextSize(1,2);
   display.println(F(" Waspada Banjir      dan Air Pasang!!"));
   display.display();  
   display.startscrollleft(0x03, 0x07);
}
   if (distance <=619 && distance >=550) { 
     
     display.setCursor(10,10);
     display.setTextSize(1);
   //Serial.println(F(" *Muka Air Normal* "));
   display.print("Elevasi: ");
   display.display();  
   display.print(distance);
   display.display();
   display.print(" cm");
   display.display(); 
   display.setCursor(0,35);
   display.setTextSize(1,2);
   display.println(F(" *Muka Air Normal*"));
   display.display();  
   display.startscrollleft(0x03, 0x07);
   
}
   if ( distance <=549) { 
     display.setCursor(10,5);
     display.setTextSize(1);
   //Serial.println(F(" *Waspada Kekeringan !!* "));
   display.print("Elevasi: ");
   display.display();  
   display.print(distance);
   display.display();
   display.print(" cm");
   display.display();  
   display.setCursor(0,25);
     display.setTextSize(1,2);
   display.println(F(" **Waspada                 Kekeringan!*"));
   display.display(); 
   display.startscrollleft(0x03, 0x07); 

}
  delay(800);
  }

  if (distance >= 680 ) {
    digitalWrite( 11, HIGH);
    delay(500) ;
    digitalWrite( 11, LOW);
    delay(200);
    digitalWrite( 10, LOW);
    digitalWrite(9, LOW);
    digitalWrite(8, LOW);
  }//*muka air banjir
  
  if (distance <680 && distance >= 620) {
    digitalWrite( 11, LOW);
    digitalWrite( 10, HIGH);
    delay(600);
    digitalWrite( 10, LOW);
    delay(200);
    digitalWrite(9, LOW);
    digitalWrite(8, LOW);
  } //*muka air waspada banjir
  if (distance <=619 && distance >=550) {
    digitalWrite( 11, LOW);
    digitalWrite( 10, LOW);
    digitalWrite(9, HIGH);
    delay(600);
    digitalWrite(9, LOW);
    delay(200);
    digitalWrite(8, LOW);
  }//*muka air normal 
  if (distance <=549 ) {
    digitalWrite( 11, LOW);
    digitalWrite( 10, LOW);
    digitalWrite(9, LOW);
    digitalWrite(8, HIGH);
    delay (500);
    digitalWrite(8, LOW);
    delay(200);
  } //muka air waspada kekeringan  
}