In order to use it you have to open C:\Users\{UserName}\Documents\My Games\WRCG\UserSetting.cfg,
Set telemetry values as follows : 

WRC.Telemetry.TelemetryRate = 60;
WRC.Telemetry.TelemetryAdress = "127.0.1.1";
WRC.Telemetry.EnableTelemetry = true;
WRC.Telemetry.TelemetryPort = 22888;

NB : 22888 must be changed according to your current simhub selected port (SimHub default being 22888).
