As Bobby mentioned, because the sensors don't use Zigbee or Z-Wave you would need a 433MHz bridge. The Abode hub can already act as a bridge of sorts, so I would suggest exploring this community if you're OK with the connection relying on their cloud API
There is an unofficial python library that allow Home Assistant to communicate locally with the Abode hub. If you don't mind the extra "bridge" you could install HA on a RPi which is very simple with their pre-built images, and then possibly use the HE driver/app named Home Assistant Device Bridge to bring the HA entities into HE where automation is a lot simpler to manage.
