• System usage: #define BLOCK_SUBSYSTEMS 156
• Application usage: #define APP_BLOCK_SUBSYSTEMS -1156
• Processed by: subsystem manager (_power)

Description: Forbid use of subsystems in bulk; disable those that are currently on. Like power loads, blocks are tracked per-key.

Parameter format: String parameter: first argument is device name. Second argument is a bit string of subsystems encoded as an integer. 1: unblocked, 0: blocked.