This was originally meant as a reply to a user having problems enabling openVFD on a Tannix T3-Mini, a device I happen to own. I have recently been through this journey myself, and having searched the forums, I cannot find a recent topic on how to build this for Armbian, so have decided to make a new post that may be of use to some.   Hold on to your hat, because this is going to be long.   Caveats These instructions are, specifically, for the Tannix TX3-Mini. However