LCD only showing white squares

hello
I am trying to get my lcd working but i keep on getting white squares.
Any advice?

this is the site where i got my lcd

I use the easy code of hello world

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup()
{
	// initialize the LCD
	lcd.begin();

	// Turn on the blacklight and print a message.
	lcd.backlight();
	lcd.print("Hello, world!");
}

void loop()
{
	// Do nothing here...
}

i also took some pictures if there is something with the wiring

thanks for the help
Jef

lcd3.jpg

lcd2.jpg

lcd1.jpg

lcd3.jpg

lcd2.jpg

lcd1.jpg

Hi,
Have you adjusted the trim pot on the back of the LCD?

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png

Thanks.. Tom.. :slight_smile:

yes i adjusted the pot but with no results

Here is my beautiful drawing :slight_smile:

thanks Jef

oke i have found my problem

i had to change te 0x27 into 0x20

Jef

Hi,
Have you tried 4k7 pullup resistors on the SDA and SCL lines?

Tom... :slight_smile:

Hi,
Good to hear... :slight_smile: :slight_smile: :slight_smile: :slight_smile:
Tom.. :slight_smile:

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