and what is the use of the I2C expansion cards?

but is there any available RS-232 == I2C conversor?

I have two 2041 lcd and I want to put it on cascade with my PC using the rs232 port.

I have read a lot of messages and the faq of the LCD but I didn't found how I can use my rs-232 port to use it with I2C and the necessary hardware interface.

Do you have any code example or any product to do this ...

I only want to say is that I can't found the START, STOP, ACK codes.

I understand, and about the ACK, START, STOP codes, in the site

http://www.ping.be/~ping0751

I can't fount nothing, even in the product specification, where I can found it?

And what about the ack,
should I implement it according to the limitations tha you wrote?

and what about the start and stop bytes
there is an example or something?
I've readed all the documentation of the I2C and the pdf of the lk162-12 and I've not found nothing.

About the acknowledge, should I not implement the ack in I2C according the limitations that you write?

I just want to know how to send I2C commands with a program.

Show I use the rs-232 port and send the the commands just I was using rs232 (using any com)?

thanks

Adrian
ikis@gmx.net