I have an AXE033 LCD module, which I bought because of the inbuilt RTC and given it had i2c I thought it would be relatively easy to use with the Arduino, but I am yet to have any success with this, I have tried using Serial, but I don't yet have a logic level converter to use with this.
When using Serial I got a string of special characters, but I found that the serial logic is negative on the module and positive on the device, when using i2c the display stays blank.
Should probably mention I'm using an Arduino Mega, IDE version 1, there's a datasheet for the module here: http://www.picaxe.com/docs/axe033.pdf
Any help would be greatly appreciated.
"See Section 1 for construction and assembly details. A jumper link (J1) is required for i2c mode."
Did you add the jumper when trying to use I2C?
Somewhere there is an I2C scanner sketch. It will tell you the addresses of any active devices on the bus.
Google says to look at I2CScanner: Arduino as I2C bus scanner – todbot blog