Well… have you ever been able to set your alarm from HA?
Maybe you need to try sending an alternative commands to your alarm - arm_away?
The controller can receive commands on the following topics:
- paradox/action/x - This can be used to arm / disarm / bypass. For arm/disarm, the x indicates the partition number (1 or 2) while for bypassing a zone, x indicates the zone number to bypass (1 - 32).