You don't need MadRouter. If you have MadMapper 2.1 or later, you can directly control it from MadMapper, example:
- Patch your fixtures on ArtNet universe 0
- In Preferences / DMX Output, choose ArtNet, network interface "localhost" (just not to pollute your network), and check the option "Route ArtNet to LED devices" => a new table appears, there you can press the + button to add a mapping from ArtNet universe 0 to the blinkytape.
Is that clear enough ?