hello i have this I2C LCD (20x4) from china:

http://www.ebay.it/itm/IIC-I2C-TWI-S...72.m2749.l2649

somebody can help me at least to test it? I know i have to drive it with the ic2write instruction but i don't know how to set the I2C interface, the site tells me that the I2C Address is 0x3F and only some code for arduino...