Like i said, i would try find out what my LCD is capable of.
Ive spent 2 odd hours reading about I2C, and a lot of posts regarding the I2C LCDs.
Ive spent near an hour playing with all the examples.
Ive updated the LiquidCrystal library to 1.2.1.
Ive loaded the LiquidCrystal_I2C library.
Ive determined its address is 0x27.
And all i can get out of it is backlight sometimes on, others off, sometimes a quik flash.
And a line of solid characters.
So it will have to wait till i aquire further knowledge with I2C.
Then i will let you know if it can do the Extended ASCII set.
Cheers mate,
but this I2C is a bit beyond me yet, i tried all sorts of code from lots of sites, and the examples, too many for me to have kept track of what i was doing!
Heres a picture anyway, from what i was reading, i think its the sainsmart one.
(I did it just to see if i could manage a simple run to try some Extended chars, but oh well)
So unless you can provide me with an example, or some quick help, to get it running..
I just went looking for the page i found how to connect it, ie. pins A4 and A5, but cant find it, and realise theres hundreds of pages regarding this out there :S. So like i said, its beyond me, and im wasting my time trying.
I tried all sorts of code from all sorts of websites, cant recall exactly. You will see most of them with Google, i searched this error at some point, and went through a few of the google results from it:
error: 'LiquidCrystal_I2C' does not name a type
(But that mustve been after i found out about that library, because i updated the LiquidCrystal library to 1.2.1 before i got as far as the I2C lib)
Pretty sure the jumper is just supplying power to the backlight, I read about controlling backlight from another pin, somewhere, so i assume you would remove jumper and connect pin to that.
lol, like i said, I2C is way ahead of me.
I see that on page 4, but have no idea about what your talking about regarding the address.
All i know is my devices I2C address is 0x27.
And the picture i saw for connections was from here: http://www.dfrobot.com/wiki/index.php/I2C/TWI_LCD1602_Module_(SKU:_DFR0063)
that code i tried too.
Lot of the code i also tried was from the examples everywhere in the IDE libraries...
//DFRobot.com
//Compatible with the Arduino IDE 1.0
//Library version:1.1
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x0F,16,2); // set the LCD address to 0x27 for a 16 chars and 2 line display
void setup()
{
lcd.init(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();
lcd.print("Hello, world!");
}
void loop()
{
}
Changing from 0x27 to 0E and 0F made no difference, just 1 line of solid characters, backlight is on.
Chip - PCF8574T
Once you have noted the address it give you, high probably not 27, correct the address in this code upload it and try it
/*
** Example Arduino sketch for SainSmart I2C LCD Screen 16x2
** based on https://bitbucket.org/celem/sainsmart-i2c-lcd/src/3adf8e0d2443/sainlcdtest.ino
** by
** Edward Comer
** LICENSE: GNU General Public License, version 3 (GPL-3.0)
** This example uses F Malpartida's NewLiquidCrystal library. Obtain from:
** https://bitbucket.org/fmalpartida/new-liquidcrystal
** Modified – Ian Brennan ianbren at hotmail.com 23-10-2012 to support Tutorial posted to Arduino.cc
** Written for and tested with Arduino 1.0
**
** NOTE: Tested on Arduino Uno whose I2C pins are A4==SDA, A5==SCL
*/
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
#define I2C_ADDR 0x3F // <<----- Add your address here. Find it from I2C Scanner
#define BACKLIGHT_PIN 3
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
int n = 1;
LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);
void setup()
{
lcd.begin (16,2); // <<----- My LCD was 16x2
// Switch on the backlight
lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
lcd.setBacklight(HIGH);
lcd.home (); // go home
lcd.print("SainSmartI2C16x2");
}
void loop()
{
// Backlight on/off every 3 seconds
lcd.setCursor (0,1); // go to start of 2nd line
lcd.print(n++,DEC);
lcd.setBacklight(LOW); // Backlight off
delay(3000);
lcd.setBacklight(HIGH); // Backlight on
delay(3000);
}
/* YourDuino.com Example Software Sketch
16 character 2 line I2C Display
Backpack Interface labelled "YwRobot Arduino LCM1602 IIC V1"
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 )-----*/
//NONE
void setup() /*----( SETUP: RUNS ONCE )----*/
{
Serial.begin(9600); // Used to type in characters
lcd.begin(16,2); // initialize the lcd for 16 chars 2 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: (CHAR, LINE) start at 0
lcd.setCursor(0,0); //Start at character 4 on line 0
lcd.print("Hello, world!");
delay(1000);
lcd.setCursor(0,1);
lcd.print("HI!YourDuino.com");
delay(8000);
// Wait and then tell user they can start the Serial Monitor and type in characters to
// Display. (Set Serial Monitor option to "No Line Ending")
lcd.clear();
lcd.setCursor(0,0); //Start at character 0 on line 0
lcd.print("Use Serial Mon");
lcd.setCursor(0,1);
lcd.print("Type to display");
}/*--(end setup )---*/
void loop() /*----( LOOP: RUNS CONSTANTLY )----*/
{
{
// when characters arrive over the serial port...
if (Serial.available()) {
// wait a bit for the entire message to arrive
delay(100);
// clear the screen
lcd.clear();
// read all the available characters
while (Serial.available() > 0) {
// display each character to the LCD
lcd.write(Serial.read());
}
}
}
}/* --(end main loop )-- */
/* ( THE END ) */
works.
i thnk where i went wrong, was this code references LiquidCrystal_I2C.h
and i never tried that with the updated v1.2.1 LiquidCrystal library, assuming that that library wasnt I2C because name never specified.
Other thing i learned searching this morning is, i think the IDE (v1.5.3), (and hopefully the screen), will support Extended chars, but the Serial Monitor in the IDE does NOT support them...
In case anybody else is interested.
but your not giving much details on your code, you lcd board or any thing.
