I need help my code dosnt work properly

Projects Programming
1

I am using a button switch to change text on my LCD screen but it keep jumping back a for between the text and i cant figure out why.
Arduino Nano
16,2 LCD screen
push button

#include <LiquidCrystal.h>
int rs=7;
int en=8;
int d4=9;
int d5=10;
int d6=11;
int d7=12;
LiquidCrystal lcd(rs,en,d4,d5,d6,d7);

int buttonPin = 5;
int button = HIGH;
int buttonNew;
int buttonOld = LOW;

unsigned long time = 0;
unsigned long debounce = 200UL;

void setup()
{
Serial.begin(9600);
lcd.begin(16,2);
pinMode(buttonPin, INPUT);

}

void loop(){
Serial.println(button);

buttonNew = digitalRead(buttonPin);

if (buttonNew == HIGH && buttonOld == LOW && millis() - time > debounce)
{
if (button == HIGH){
button = LOW;
lcd.clear();
lcd.setCursor(0,0);
lcd.print("HELLO WORLD");
}
else
button = HIGH;
lcd.clear();
lcd.setCursor(0,0);
lcd.print("GOODBUY");

time = millis();

}

buttonOld = buttonNew;

}

2

You may need:

pinMode(buttonPin, INPUT_PULLUP);

How is your switch wired ?

FYI

else
{   //   Did you mean to add these   {   }
button = HIGH;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(“GOODBUY”);

}
3

Thanks vary much it works perfectly.

4

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