It’s like connection with Telnet or PuTTY to TCP port 30001.
Described in the official manual: https://help2.malighting.com/Page/grandMA2/remote_control_telnet/en/3.0
MA3 is very new on the market and not every communication interface is implemented or finished. Also stuff changed from grandMA2 to grandMA3. Even if I can not provide a release date for MA3 support, it is planned for near future.
This page was last updated: December 13, 2019