@Lazar-Demin OP "told" us a few backround info too

he has an Omega2+ with FW ??? I guess - he has no dock or maybe has some custom dock he has a CH340 USB-to-serial module / cable, it seems the Omega Tx -> PC Rx connection is broadly OK he has a Windows ??? PC with PuTTY

I think he has some hardware problem - so the

What does your hardware setup look like?

is a very good question.