/*Water level monitoring system with the New Blynk app
   Home Page
*/
//Include the library files
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>

#define SCREEN_WIDTH 128 //Setting up OLED display resolution
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// Define the component pins
#define trig 32
#define echo 33
#define SCL 22
#define SDA 21
#define buzzer 18
#define relay 3


void setup() {
  Serial.begin(9600);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(relay, OUTPUT);
  digitalWrite(relay, HIGH);
   delay(1000);
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) //Works only if display allocation failure is encountered 
  {   
    Serial.println(F("SSD1306 allocation failed"));
    for (;;)
      ;
  }
}

//Get the ultrasonic sensor values
void ultrasonic() {
  digitalWrite(trig, LOW);
  delayMicroseconds(4);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  long t = pulseIn(echo, HIGH);
  int distance = t / 29 / 2;

  if (Level1 <= distance) {
    lcd.setCursor(8, 0);
    lcd.print("Very Low");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);
    digitalWrite(LED4, LOW);
    digitalWrite(LED5, LOW);
  } else if (Level2 <= distance && Level1 > distance) {
    lcd.setCursor(8, 0);
    lcd.print("Low");
    lcd.print("      ");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, LOW);
    digitalWrite(LED4, LOW);
    digitalWrite(LED5, LOW);
  } else if (Level3 <= distance && Level2 > distance) {
    lcd.setCursor(8, 0);
    lcd.print("Medium");
    lcd.print("      ");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, HIGH);
    digitalWrite(LED4, LOW);
    digitalWrite(LED5, LOW);
  } else if (Level4 <= distance && Level3 > distance) {
    lcd.setCursor(8, 0);
    lcd.print("High");
    lcd.print("      ");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, HIGH);
    digitalWrite(LED4, HIGH);
    digitalWrite(LED5, LOW);
  } else if (Level5 >= distance) {
    lcd.setCursor(8, 0);
    lcd.print("Full");
    lcd.print("      ");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, HIGH);
    digitalWrite(LED4, HIGH);
    digitalWrite(LED5, HIGH);
  }
}

//Get the button value
BLYNK_WRITE(V1) {
  bool Relay = param.asInt();
  if (Relay == 1) {
    digitalWrite(relay, LOW);
    lcd.setCursor(0, 1);
    lcd.print("Motor is ON ");
  } else {
    digitalWrite(relay, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("Motor is OFF");
  }
}

void loop() {
  Blynk.run();//Run the Blynk library
  timer.run();//Run the Blynk timer
}