automatic-pump/main at master · Techieali/automatic-pump · GitHub

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#include <HCSR04.h>
#include <Wire.h>
#include <LiquidCrystal_PCF8574.h>


LiquidCrystal_PCF8574 lcd(0x3F);  // set the LCD address to 0x27 for a 16 chars and 2 line display
int show;

UltraSonicDistanceSensor distanceSensor(13, 12);  // Initialize sensor that uses digital pins 13 and 12.

void setup () {
    Serial.begin(115200);  // We initialize serial connection so that we could print values from sensor.


     int error;
     Serial.println("LCD...");

  while (! Serial);

  Serial.println("Dose: check for LCD");

  // See http://playground.arduino.cc/Main/I2cScanner
  Wire.begin();
  Wire.beginTransmission(0x27);
  error = Wire.endTransmission();
  Serial.print("Error: ");
  Serial.print(error);

  if (error == 0) {
    Serial.println(": LCD found.");

  } else {
    Serial.println(": LCD not found.");
  } // if

  lcd.begin(16, 2); // initialize the lcd
  show = 0;


}

void loop () {
    // Every 500 miliseconds, do a  using the sensor and print the distance in centimeters.
    Serial.println(distanceSensor.measureDistanceCm());
    delay(500);
    Serial.println(map(distanceSensor.measureDistanceCm(), 50, 0, 0, 100));

     if (show == 0) {
    lcd.setBacklight(255);
    lcd.home(); lcd.clear();
    lcd.print(map(distanceSensor.measureDistanceCm(), 50, 0, 0, 100));
    delay(1000);
    lcd.setBacklight(0);
    delay(400);
    lcd.setBacklight(255);

  } else if (show == 1) {
    lcd.clear();
    lcd.print("Cursor On");
    lcd.cursor();

  } else if (show == 2) {
    lcd.clear();
    lcd.print("Cursor Blink");
    lcd.blink();

  } else if (show == 3) {
    lcd.clear();
    lcd.print("Cursor OFF");
    lcd.noBlink();
    lcd.noCursor();

  } else if (show == 4) {
    lcd.clear();
    lcd.print("Display Off");
    lcd.noDisplay();

  } else if (show == 5) {
    lcd.clear();
    lcd.print("Display On");
    lcd.display();

  } else if (show == 7) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("*** first line.");
    lcd.setCursor(0, 1);
    lcd.print("*** second line.");

  } else if (show == 8) {
    lcd.scrollDisplayLeft();
  } else if (show == 9) {
    lcd.scrollDisplayLeft();
  } else if (show == 10) {
    lcd.scrollDisplayLeft();
  } else if (show == 11) {
    lcd.scrollDisplayRight();
  } // if

  delay(2000);
  show = (show + 1) % 12;
} // loop()