Sensor attributes

Some sensors have a simple primary state but expose richer details as attributes. Any of these can be extracted into a separate Home Assistant entity with the built_in_attribute custom sensor type (see Custom sensors), or with the + button next to the sensor's name on the Built-in sensors tab, which offers every attribute path the PC has.

Sensor	Attributes
LAN IP	addresses[N].adapter, addresses[N].description, addresses[N].address
Active displays	displays[N].name, displays[N].primary, displays[N].width, displays[N].height, displays[N].x, displays[N].y
Recent Event Log errors	window_minutes, events[N].log, events[N].provider, events[N].event_id, events[N].level, events[N].created_at
Last shutdown reason	reason, event_id, created_at, message
Last wake reason	source, kind (modern_standby, sleep, hibernate, fast_startup), created_at, duration_seconds, sleep_entered, detail
Sleep blocked	system_required, display_required, away_mode_required, primary_blocker, blockers[N].category, blockers[N].type, blockers[N].name, blockers[N].reason, blockers[N].blocking
GPU usage	name (the GPU the main value follows), engines.<type> (e.g. engines.3d, engines.videodecode), npu_usage, memory_dedicated_gb, memory_shared_gb (and the same in _mb), adapters[N].name, adapters[N].memory_gb, adapters[N].usage, adapters[N].engines.<type>, adapters[N].memory_dedicated_gb, adapters[N].memory_shared_gb (and _mb)
Memory usage	total_gb, used_gb, available_gb
System drive free % / (GB)	drive, total_gb, used_gb, free_gb
Drive health	temperature (the system drive's), drives[N].name, drives[N].health, drives[N].bus, drives[N].media, drives[N].temperature, drives[N].temperature_max, drives[N].power_on_hours, drives[N].wear, drives[N].system
Audio sessions	apps[N].app, apps[N].volume, apps[N].muted, apps[N].active
Camera in use / Microphone in use	apps[N]

Drive health is what Windows keeps about the drive (the Storage Management API, read by the service). The value is Windows' verdict from the SMART data, the worst among the drives: healthy, warning, unhealthy, unknown. NVMe drives report the temperature and its highest value, a SATA drive the temperature and the power-on hours when its controller passes them on, USB enclosures nothing; a field the drive does not report is left out. The system drive comes first.

GPU usage with more than one GPU (an integrated one and a graphics card, for example): the sensor's value and the top-level engines, memory_dedicated_mb and memory_shared_mb follow the busiest GPU at each reading, so they can move from one GPU to the other. For one GPU of your choice use its own values under adapters[N] (10.10.0+): adapters[1].usage, adapters[1].engines.3d, adapters[1].memory_dedicated_mb. adapters[N].name tells which is which; the order is the one Windows lists the display adapters in, and does not change between readings.

LAN IP is the address of the adapter Windows routes through, the one with the default route (10.10.0+). addresses[N] lists every connected adapter, that one first, then the ones with a gateway, then virtual adapters such as VirtualBox, Hyper-V, WSL or Docker. Before 10.10.0 it was simply the first adapter Windows listed, often a virtual one.

From the attribute list to an entity

The + button next to a sensor's name (Built-in sensors tab) and the editor's list offer every attribute path this PC has: adapters[1], displays[1], drives[1] and so on for every item the sensor last reported, not only [0]. A sensor made from the list gets its unit (°C for a temperature, h for hours, GB or MB for memory, % for a load), and with it a device class in Home Assistant, so a °C sensor shows as °F where that is the custom. The second item's sensor gets a 2 after its name. The box of a role that cannot read the sensor is greyed.

A custom attribute sensor on a faster profile than its built-in sensor refreshes the shared read at its own pace, while the built-in sensor keeps showing Home Assistant its value and attributes at its own: an hourly GPU usage stays hourly in the recorder even with one adapter's load wanted every second. Polling profiles has the details.