LCD Display

DJ, You were absolutly correct "There are problems i've found with I2C displays though. They are usually poorly documented or have strange initialization commands." I ran the code you wrote above and nothing happened. I have found the documentation but it reads like Greek to me. Any advise?

The code I pasted was an example of how I assumed it would work, but there are two things that are missing...

1. You'll need to know the address. the 0x0a was just a sample

2. It might not accept merely a string of text. You might have to send it an initialization string first

Thanks for the input DJ, I found the address. It is 0x27. I tried that and all that happened was the screen turned from a lit blue (on power up) to a blank (no power). Any idea how to find out what the initialization string might be?

DJ, This is what I found. Makes no sense to me but it may to you. Can you translate?

///Arduino Sample Code ///www.DFRobot.com ///Last modified on 17th September 2010

#include #include

LiquidCrystal_I2C lcd(0x27,16,2); // 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.setCursor(0, 1); lcd.print("Hello, world!"); }

void loop() { // 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()); }

You know, i'm entirely unsure what that mess is. I'll have to probe the Arduino library to see what they're doing. Does your LCD have a serial interface also? You can use that instead maybe.... Now that ARC supports more than one EZ-B Board You have lots of free I/O!

I2C is great if your hardware is documented. Doesn't look like that I2C LCD is documented very well

DJ, I found an add that has alot of documentation. Can you please take a look and see if maybe there is a solution at hand?

E Bay add

Many thanks in advance.

try

 sendI2C(0x50, 0x80, "Hello world")

also, make sure the interface is indeed I2C and not SPI. The pins should be marked as:

• SDA
• +5
• GND
• SCL

Ah after fustrating searches... Look at this link: Proper Datasheet

Your device address is 0x27 it seems. Now I still don't know what command is sent to write a string.. you can try this first

sendI2C(0x27, "Hello World")