How to link to RFXtrx over TCP?

I have setup a RFXtrx433E connected to a smal linux box.
With ser2net I share the USB port over the network.
On my Ubuntu machine where HA runs I created a virtual port with:

socat pty,link=/dev/ttyV0,raw tcp:

But HA refuses to setup the connection. I got these errors in the logfile:

[17-04-14 13:36:25 INFO (MainThread) [homeassistant.loader] Loaded rfxtrx from homeassistant.components.rfxtrx
17-04-14 13:36:25 INFO (MainThread) [homeassistant.setup] Setting up rfxtrx
17-04-14 13:36:26 ERROR (MainThread) [homeassistant.setup] Error during setup of component rfxtrx
  File "/usr/local/lib/python3.4/dist-packages/homeassistant/components/", line 162, in setup
    RFXOBJECT = rfxtrxmod.Connect(device, handle_receive, debug=debug)
* [rfxtrx](
* [rfxtrx](

The RFXmngr program from RFXCOM on my windows machine runs fine and can find the Rfxtrx433e.

Any help would be appreciated.

what is in your configuration file?

You do know how to manage it?
I can’t really find out how to set it up with TCP.