Unclear where to start with rolling a Photon Server solution

Hey guys,

I'm working on a commercial product with a heavy hardware backend sending primitive data to Unity which is essentially being used just for visualization. Our existing implementation is Photon 3 with Lite (which is obsolete now, it seems). We had this outsourced ages ago and never put anymore work into it and the personnel with the knowledge aren't around anymore but we need to sort out some obscure issues we're having with communication and starting to think we need to just write a new implementation from scratch and port to Photon 4.1.x. We don't have a network specialist and I'm the only person with Unity knowledge, tasked to upgrade the existing stuff to the latest photon.

Thats where I need some feedback. We have Photon Control on a workstation with Unity and a separate workstation running some proprietary software which just sends messages over a TCP socket which Photon relays to Unity. This is a local scenario and isn't connected to the internet.

So from starting with the Unity Server SDK where should I start looking to facilitate this scope? I really just need Photon to listen on a port and bounce whatever comes across it over to the Unity client(s). The LoadBalancingAPI and examples seem very robust and over complicated for what we're trying to do, making it a slow process (for me) to find a solution.

Any feedback is appreciated.

Thanks