Hello. Indeed, UDP does not need the "authenticate" command! Unfortunately IOCore cannot send commands over TCP (only receive). The backbone return does not work in HEX. And sending the whole message in HEX doesn't work either. I also noticed one strange thing, for some reason, when sending a command, it sends each line twice (this can be seen in the command monitor in IOCore)! So so far we have not been able to set up normal UDP work. On the advice above, so far I have configured it via Artnet and DMX. I will try to figure it out with UDP, if you have any more ideas, please let me know. Thanks