I finally found a solution,
just putting a tempo of 100 us just after the write and it works.

- The speed is set up into my short C program
- for the mass it is the same in both
cases, I take it directly on the motherboard
with the +12v. I just shift the DB9 connector
to my laptop.
- for noise why should I have more noise
on my pc board than on my laptop.

Hello,

I'd like to build an mp3 car player
and I need to display informations on
my LK204-25.
I tried a simple C program under Linux
juste writing a string to the serial port.
With my Laptop it works perfectly, but
with my future mp3 player it doesn't
work. Insted it displays odd characters.

Any ...