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Interfacing Arduino and DFrobot LCD part2: Scrolling Left and Right

HELLO THERE!!!

      As usual, how are you guys? I hope you guys are fine always. This week I wanted to share with you guys about scrolling left and right in the DFrobot LCD. Last week, I was able to show you guys on how to set up the buttons to show text output. This week, I will show you guys on scrolling left and right when pressing the respective buttons.

    Ok, Lets see what do we need for this experiment this week.

HARDWARE:1.Arduino UNO
2.DFrobot LCD Keypad Shield

SOFTWARE:
1. Arduino IDE



   Now that the items are sorted out, let's see how to assembly the circuit. The circuit assembly is no different than the last week's assembly:




After assembling the the circuit, connect the Arduino to the computer and upload the following code to the Arduino:


#include<LiquidCrystal.h> // the liquid crystal lib

LiquidCrystal lcd (8, 9, 4, 5, 6, 7);

int lk = 0; // lcd key
int aki = 0; // analog key input

#define R 0 // button right = 0
#define U 1 // button Up =1
#define D 2 // button down = 2
#define L 3 // button left = 3
#define S 4 // button Select = 4
#define Hi 5 // other than that all the button is hi(none pressed)

int reads()
{
  aki = analogRead(0); // read value of button pressed
  
  if (aki > 1000) return Hi; //if value is 1000(none pressed go to hi)
  
  if (aki < 50) return R;//values of the button
  if (aki < 195) return U;
  if (aki <380) return D;
  if (aki < 555) return L;
  if (aki < 790) return S;
  
  return Hi;//after press go to Hi
  
}


void setup() {
lcd.begin(16,2);// lcd begin for all pixels(col,rows)
lcd.setCursor(0,0);//start in position 0,0(beginning of the lcd)
lcd.print(" HI I AM NICO");//print from (0,0)

}

void loop() {
  
  lcd.setCursor(0,1);//cursor is now set at col 0 row 1
  lk = reads();// run the reads() function and store val at lk
  
switch(lk) // effect after each button is pressed
{
  case R:
  {
    lcd.scrollDisplayRight();
    delay(150);
    break;
  }
  case L:
  {
    lcd.scrollDisplayLeft();
    delay(150);
    break;
  }
  case U:
  {
    lcd.print("THIS IS UP ");
    break;
  }
  case D:
  {
    lcd.print("THIS IS DOWN ");
    break;
  }
  case S:
  {
    lcd.print("THIS IS SELECT ");
    break;
  }
  case Hi:
  {
    lcd.print("Press left or right to scroll");
     lcd.setCursor(8,1); //if not pressed hi will always run and after welcome word nothing will be there
  lcd.print("               ");
    break;
  }
}
}



The Testing video can be viewed here: https://youtu.be/JZU3I6RsmaI























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