Scroll LCD display connected to an Arduino Uno

Question

I want to make some characters scroll left without affecting the first positions in each row of my LCD 16x2 screen. I have this code inside the loop so far:

lcd .clear();
lcd.setCursor(17, 0);
for (int i = 15; i > 0; i--) {
  lcd.print("x");
  lcd.scrollDisplayLeft();
  if (digitalRead(switchPin) == HIGH) {
    lcd.setCursor(0, 0);
    lcd.write(5);
  } else {
    lcd.setCursor(0, 1);
    lcd.write(5);
  };
  lcd.setCursor(17, 0);
  delay(500);
}
lcd.noAutoscroll();

I think it should work, but the character x just moves left by one position, whereas the character in the first position, either in the first or second row doesn't appear at all.

There is an example that does just this shipped with the arduino IDE and the LCD library. Check it out — Supragy Mishra
– Supragy Mishra, Commented Aug 11, 2021 at 10:31

Igor Stoppa · Accepted Answer · 2015-07-02 21:28:53Z

0

I would do the following (beware - not tested):

lcd.clear();
lcd.setCursor(15, 0);
lcd.print("x");
for (int i = 0; i < 15; i++) {
    lcd.setCursor(0, digitalRead(switchPin) == LOW);
    lcd.print("5");
    delay(500);
    lcd.scrollDisplayLeft();
}

edited Jul 2, 2015 at 21:28

answered Jul 2, 2015 at 19:34

Igor Stoppa

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