@Ammar-Assad said in read uart my omega?: I have tested ls /dev/tty* and ttyUSB0 existed only when connecting usb to serial cable Yes. You want to send a "Message" to an Omega2 using the echo - cat commands via some serial connection. You have got an Omega2, probably a Linux box, probably a USB-to-Serial cable... AND ... Please let us know the details too.

What do you mean "going in loop"? Do you have TX1 and RX1 looped together (You should, according to the page)