Re: Problem with custom chars on LCD ( SOLVED )

Using Arduino Displays
1

Hello,
I have a problem with the custom characters on LCD.
When I load up the code It works great and It has this appearance:

3264×2448 503 KB

But when I unplug it and plug in again It has this appearance :
3264×2448 924 KB

and I must run the code again.
I use arduino nano

2

This is an example of my code:

#include <LiquidCrystal.h>
#include <Wire.h>
LiquidCrystal lcd(11, 10, 7, 6, 5, 4);

byte arrowL[8]={B00110, B01100, B11000, B11111, B11111, B11000, B01100, B00110}; //icon for arrowL

byte arrowR[8]={B01100, B00110, B00011, B11111, B11111, B00011, B00110, B01100}; //icon for arrowR

byte termometru[8]={B00100, B01010, B01010, B01110, B01110, B11111, B11111, B01110}; //icon for termometer

byte picatura[8]={B00100, B00100, B01010, B01010, B10001, B10001, B10001, B01110};//icon for water droplet

void setup(){
  lcd.createChar(1, termometru);
  lcd.createChar(2, picatura);
  lcd.createChar(3, arrowL);
  lcd.createChar(4, arrowR);
  lcd.begin(16, 2);
  lcd.clear();
}

void loop (){
  lcd.setCursor(0,0);
  lcd.print(char(1));
  lcd.setCursor(5,0);
  lcd.print(char(2));
  lcd.setCursor(0,1);
  lcd.print(char(3));
  lcd.setCursor(5,1);
  lcd.print(char(4));
}
3

When you say "I unplug it and plug in again", do you mean the entire system, or just the LCD?

4

You should probably initialize your LCD controller before you start using it.

Put your lcd.begin(...); statement first.

Don

5

Alex_Tr:
Hello,
When I load up the code It works great ... But when I unplug it and plug in again ... I must run the code again.

Yes, of course. Why would you expect anything different?

So, what's the problem?

6

LCDs do not have any non volatile memory. Power off and they forget.

7

Well,
I fixed it..
It was the library (liquid crystal),
I reinstall arduino.exe and now works great.

8

igendel:
When you say "I unplug it and plug in again", do you mean the entire system, or just the LCD?

Seems as if we will never know.

9

Paul__B:
Seems as if we will never know.

:smiley:
Heh, we could try to re-install this forum system, maybe the answer will come up...

10

igendel:
:smiley:
Heh, we could try to re-install this forum system, maybe the answer will come up...

From what I understand it may also have other benefits as well :wink:

11