According to the documentation @Harry shared, it turns out that these Brel blinds are simply yet another re-brand of commonly used blind motors, originally developed by Coulisse B.V. under the name Motion Blinds. It turns out that a Homey app already exists (thx to @Edwin_D)for this brand to use the Hub locally, which also works fine for Brel blinds (including TDBU):
Community topic:
Based on some other references, i think it is quite likely this app also will work for the brands:
