Please read carefully if this is your combination of devices:
If your navigation devices are Oudie (or any other kind of PDA/PNA running SeeYou Mobile) connected to LX Nav V7 vario which is further connected to a Flarm (or RedBox or MiniBox or MiniOZ) by the LX Splitter then beware that direct communication from SeeYou Mobile/ConnectMe to Flarm (downloading flights, task declaration) in this combination WILL NOT WORK if external Flarm display is connected to the Splitter.
This is because the Transmit line from the Flarm Display will interfere with the communication between SeeYou Mobile / ConnectMe and the Flarm.
. Disconnect Flarm Display from the Splitter (can be clumsy depending on the location of the Flarm Display)
. Connect to Flarm bypassing the V7 or Splitter (probably very clumsy, less so when using Oudie because standard cables fit)
. Make a switch which breaks the Transmit line from Flarm Display for the duration of communication (prone to errors - leaving the switch in the wrong place)
Neither solution is great but at least it is workable. Maybe the LX companies will create a more simple hardware solution but at this moment there is none.
Thanks goes to Chris Edwards for his patience and professionalism in debugging all this:
I have tested the following Oudie/V7/Red Box combinations. Results below:
The Oudie can declare tasks to the Red Box using the following configurations:
Red Box < Oudie
Red Box < Spliitter < Oudie (both splitter connections)
Red Box < V7 < Oudie
Red Box < V7 < LX Splitter < Oudie (both splitter connections)
The Oudie will NOT declare tasks to the Red Box using the following configuration:
Red Box < V7 < Splitter < Oudie < Flarm Display (connected to splitter)
It seems the Flarm display prevents the Oudie/V7 from transmitting via the splitter, presumably to prevent display interference.