OPTIONAL! This is possible to add more camera | flash relase clients. In my case there is another one client with unique name (CLID = “4_LED”) and IP adress.
Firing MQTT clients from cameras hot shoe | PC connector is an different option (see Schematic 2) – it needs to comment or remove shutter open-close and flash timer delay in LUA client code.
Of course no need to use GPIO0 as shutter pin, no need to N3 cable! Focus | shutter are set | operating in camera – MQTT clients are firing only the flash(es).