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Topic: SainSmart 20 x 4 LCD wanting to use I2C from Arduino Uno (Read 18 times) previous topic - next topic


I was wondering myself what wire.begin 

I simply cannot imagine.
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.


can anybody help me please?  has anyone ever built an arduino I2C lcd project



How do I know which address to use as well? I have seen a lot of 0x27 stuff

I was using the LiquidCrystal_I2C lcd( 0x27, 20, 4); to initiate the LCD...

I noticed you also posted in this thread:http://arduino.cc/forum/index.php/topic,119502.15.html
So by now you have already found and used the I2C-scanner found here:http://arduino.cc/playground/Main/I2cScanner
This is the adress you need to put in the declaration.


Give the New liquidCrystal library a shot:

It is reported to work with the Sainsmart LCD. I think at base address 0x27.

Wiring info on corresponding section.


This is a dumb question, I know...but how do I "open the serial monitor"  I uploaded the code for the I2C scanner and it compiled fine...but now what?

I did try the new liquid crystal library but which version are you referring to? There are like 10 downloads on that bitbucket page.....

so confusing....and is this for 1.0 or 1.0.1?

I saw some posts of some sainsmarts getting to work, but dammit I want mine to

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