Hello, I use the modules rt_com for send and receive data,and when i send data in the next read operation,i read what i have write before, What the problems can you help me. I look at the code but i can see the Pb,perhaps my configuation of the serial line is bad... Thanks --- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] ---- For more information on Real-Time Linux see: http://www.rtlinux.org/~rtlinux/