Wouhaou, yes, I haven't thought about the Interface. I will analyze the lx200 code, try to understand how they have dealt with that and key posted.
During the nigth, I also had a new idea. I reminded that the way I wrote the interface from the controller side is a fork of a classic Telnet server, which leads to the capacity to accept multiple incoming tcp "clients". I could have two separate INDI drivers which would, both, open a telnet socket and keep the socket purpose in the Microcontroller code (one for communicating FilterWheel events, the other one for focuser events) but I find this workaround pretty inelegant.
Thanks again James.
 

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