@gluap,
I forked your repo and changed the REQUIREMENTS to directly install pyduoferm from GitHub, thus installation on hass.io is now working. I know that this is not appreciated by HA Devs but as soon as you managed the pypi release we’re back on track with an officially supported method for hass.io.
Since i can’t test with HASSbian I don’t know if the installation from GitHub will work for you.
Next step will be the pairing, no clue yet, we’ll see
UPDATE: No luck today, still no clue how to start pairing in hass.io
UPDATE 2: Managed to pair via addon 
UPDATE 3: Readme updated in forked repository