I ditched a lot of time and achieved nothing. Connection failed. Thank you for your help and participation.

@bearer Hello. Thanks for the advice. I will check.

@stephen6309 Hello. very easy to connect to Large-K. The same actions on Duet do not give a result.

@zapta Hello. I just want to solve the connection problem.

Hello. Simplify3d does not connect when wifi is connected. In the communication settings, s3d set hardware flow control. I generate a virtual port using HW VSP3. I’m not sure what I need to specify in the port field ... I indicated empty open ports there, tried to leave it empty ... Nothing happens. I ask for advice, what am I doing wrong? Thank.

I did not read the inscriptions on the board, since English is not my native language. I apologize to the community if I addressed the wrong address. I did not buy this board directly from the manufacturer, I bought it on the secondary market which was in use. Thanks for all the answers.
Dear dc42, is it necessary to update the electronics firmware to a later version?

Alas, I do not understand a clone or not. As I understand the project is open, therefore it is impossible to talk about falsification. If I am mistaken in some way, please correct it.

Hello. I bought Duet WiFi 1.04 electronic board in the secondary market. At the command M115 gives out the version of Firmware electronics 1.02. What did I buy, 1.02 or 1.04? Will everything work as it should? Thank.!