Stan,
In the wifi configuration, are you saying there's a method whereby a tablet can vary the DC output voltage and polarity of a TIU's fixed channel to run a conventional HO engine?
No, not at all.
He asked how to run an HO DC engine conventionally on a TIU channel. He can do so, as long as he varies DC voltage using a transformer. I didn't say anything about using the remote or the app.