it was the command I didn't add delay and I overwrite keypressed at the beginning of each loop.

Thanks,
I think that has solved my problem.

Thanks Raqual,
I have tried that, no difference I wonder if there is anything else involve in clearing the buffer like insufficient delays, as the rest of the command works perfectly.

Well that is right but this was only part of my code so the whole code is part of bigger code which reads the key everytime, the thing is without resetting the LCD it doesn't clear buffer so even after using that command still reads back the same key

I am using this LCD in an embedded design using micro and my goal is to read entered key once and run some commands and clear the buffer for the next run of the loop but it seems even after clearing the buffer I still read some key from keypad so it goes into repetitive loop. I wonder if there is an...

I am trying to use the LK204-7t-1U-USB LCD and it looks that I am not able to clear the keypad buffer with oxfe 0x45 command I wonder if this is known issue and if it is do you have a solution for that.