I’ve managed to get it working by utilizing the “MQTTManager” plugin on Jeedom which publishes all ajax devices states to the HA MQTT Broker. Then i create MQTT sensors for the devices i am interested in. As for arming/disarming i in return have in Jeedom set-up scenarios which trigger on specific MQTT messages i send from HA.
If you want to avoid all the custom MQTT sensors you can also use the Jeedom API. Easy to use considering that you can generate an url on their web portal by going to Analysis → Domotic Overview and then clicking for example your Ajax Hub then Mode nuit for night mode and then clicking the little gear icon. This will show you a page which allows you to get the direct url to that command. Then just call those form HA to either activate relays, alarm modes or to get values for devices.