No I tried resetting device still no good. I run below code in both LCD revisions

StartI2C();

setI2CAddress(0x50);

clearScreen();

setCursorPos(1, 1);

blinkOn();

writeChar('a');

StopI2C();

In Revision 1 there is no problem it clears the screen writes char 'a' on the screen to the ...

Thank you for your kind reply. I can not display characters on screen yet I can issue clear screen command set contrast command. Isn't it weird?

Hi there I am using both versions of LK204-25 Rev1 and Rev2. I can use use Rev1 without any problem using I2C protocol. Whereas when I try to run the same code on Rev2 board it does not work properly. I soldered I2C jumpers on the Rev2 board and I am using 0x50 as default I2C address. I can run some ...