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Netherlands
Asked — Edited

Re: I2c Help

Hi DJ,

In your i2c help, you mentioned that the address is 7 bits correct me if i'm wrong but if you've got bit 0-7 then isn't it 8 bits?

Let me explain:

bit 0 - 1 bit
bit 1 - 1 bit
bit 2 - 1 bit
bit 3 - 1 bit
bit 4 - 1 bit
bit 5 - 1 bit
bit 6 - 1 bit
bit 7 - 1 bit

You see? in total, you've got 8 bits now.



Edit: wait i'm confused *blush* please delete this thread.....

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Synthiam
#2  
DJ,
Did you ever get a chance to mess around with the i2c LCD. Mine just sits there being blue. "Hello world" would be awsome.
PRO
Synthiam
#3  
I tried, lots. But those lcd's have zero documentation. Without documentation, i'm shooting in the dark. There is a combination of hundreds of addresses and commands to guess from. Thousands actually. I know why they're so cheap now!
Netherlands
#4  
@DJ

I found this arduino code:

Code:


#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();
lcd.backlight();
lcd.setCursor(0, 0);
lcd.print("hello world");
lcd.setCursor(0, 1);
lcd.print("hello world 2");
}


I bet you will find out how to do it if you decompile the LiquidCrystal library.


Also @Bookmaker what LCD do you have?
PRO
Synthiam
#5  
I've looked at the library. We've tried the 0x27 address. The issue is these no-name i2c lcd's have no documentation so we don't even know what address they are, or if they've even compatible with that library.
Netherlands
#6  
You could try with an arduino first, i'm afraid to ask, but do you have one laying around?
#7  
I looked in the turorials and don't see anything on how to program the Serial ones. Are they ease for a none nerd like me? I want to replace the i2c one and get the LCD up and running. Iyron, you are welcome to my old one.
#8  
I may have found the solution.
i2c LCD forum
It states some ways down the they shipped the wrong library with the LCD and they give a url for the correct one.
Naturly I don't have the vaguest idea what they are talking about however you may.

correct library
Netherlands
#9  
@Bookmaker
Yes, serial LCDs are so much easier, i have a sparkfun one that i got up and running in less than 10mins.

Anyways,
Good luck with the library you found!
If you need any help, hit me up.
#10  
Lyron,
I don't know anything about i2c much less the library. May be DJ can give us a hand here?
#11  
@Bookmaker
LINK:I2C
SCL : Clock
SDA : Data

clock is used to notify which device is going to be master in order to ship data across the I2C bus
also to notify data: 1's and 0's.