alarmSystemStatus?

[RBoy (www.rboyapps.com - Making SmartThings Easy!)]

As Jimmy said, that’s used for the Classic SHM. The new STHM app doesn’t allow direct control at this time from any apps. Feel free to petition ST support to add the ability to control STHM from apps.

However there are workarounds you can to control STHM with SmartApps and automations. Check out this post here which explains how to use STHM using Automations and SmartApps:

[OBSOLETE] Lock User Management (LUM)

Thank you for sharing this @milandjurovic71, adding a few details for the community. How to use LUM to arm/disarm new STHM using virtual switches and Automations Virtual Switches: Create 3 virtual switches in the IDE -> My Devices -> + New Device -> Name & Device network id: STHM Arm Away , Type: Virtual Switch Name & Device network id: STHM Arm Stay , Type: Virtual Switch Name & Device network id: STHM Disarm , Type: Virtual Switch [IMG_5998] Automations: Create these 3 automations using the new ST app: [IMG_6003] [IMG_6002] [IMG_6004] [IMG_5999] Configuring LUM to arm/disarm STHM To arm STHM when locking via a keypad, select the STHM Arm Away virtual switch under Lock/Unlock Actions -> Keypad lock actions -> Turn on switch(s) To disarm STHM when unlocking via a keypad…