Hi @Millumin
I have a Panasonic beamer (PT-RZ120) which is never detected in the unicast devices list.
My other device is always detected & green. 
The vp is always red but works flawlessly both in PJLink and Art-net anyways.
If it makes sense to you ?...  v5.12p 
Thanks
                 
                
Comments
Hello @hyll,
This may be because your beamer is not supporting ArtPollReply feature of the Artnet protocol.
Best. Philippe
It would make sense. thanks Philippe