I use the I2C from here:
The display from same shop:
arduino :
https://www.vanallesenmeer.nl/Arduino-uno-r3
The library installed is the one from here :
(i have tried the 1.3.4 and 1.3.5)
https://bitbucket.org/fmalpartida/new-liquidcrystal/downloads/
with all of the scetshes i have tried the same problem keeps uppearing :
When the setup is cut off the power for multiple ours, then the sketch appears nicely on the screen.
When i push the reset button , or reset by cutting off power and back on, then everything is gone.
It does not work to re-upload the sketch.
If i whate again a fiew owers, the last uploaded skecht does work.
This is one of the sketches that works , but with explaned problem above.
/* YourDuino.com Example Software Sketch
20 character 4 line I2C Display
Backpack Interface labelled "YwRobot Arduino LCM1602 IIC V1"
Connect Vcc and Ground, SDA to A4, SCL to A5 on Arduino
terry@yourduino.com */
/*-----( Import needed libraries )-----*/
#include <Wire.h> // Comes with Arduino IDE
// Get the LCD I2C Library here:
// https://bitbucket.org/fmalpartida/new-liquidcrystal/downloads
// Move any other LCD libraries to another folder or delete them
// See Library "Docs" folder for possible commands etc.
#include <LiquidCrystal_I2C.h>
/*-----( Declare Constants )-----*/
/*-----( Declare objects )-----*/
// set the LCD address to 0x27 for a 20 chars 4 line display
// Set the pins on the I2C chip used for LCD connections:
// addr, en,rw,rs,d4,d5,d6,d7,bl,blpol
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // Set the LCD I2C address
/*-----( Declare Variables )-----*/
void setup() /*----( SETUP: RUNS ONCE )----*/
{
Serial.begin(9600); // Used to type in characters
lcd.begin(20,4); // initialize the lcd for 20 chars 4 lines, turn on backlight
// ------- Quick 3 blinks of backlight -------------
for(int i = 0; i< 3; i++)
{
lcd.backlight();
delay(250);
lcd.noBacklight();
delay(250);
}
lcd.backlight(); // finish with backlight on
//-------- Write characters on the display ------------------
// NOTE: Cursor Position: Lines and Characters start at 0
lcd.setCursor(3,0); //Start at character 4 on line 0
lcd.print("Hello, world!");
delay(1000);
lcd.setCursor(2,1);
lcd.print("From YourDuino");
delay(1000);
lcd.setCursor(0,2);
lcd.print("20 by 4 Line Display");
lcd.setCursor(0,3);
delay(2000);
lcd.print("http://YourDuino.com");
delay(8000);
}/*--(end setup )---*/
void loop() /*----( LOOP: RUNS CONSTANTLY )----*/
{
}/* --(end main loop )-- */
/* ( THE END ) */
I hope with this information anybody can see what i am missing or doing wrong.
Thanks
