# Device Event (`deviceEvent`)

This is the Tidepool data type for a variety of events that can occur on diabetes devices, including both insulin pumps and continuous glucose monitors. As a type, it is essentially a "grab bag" of miscellaneous sub-types, where each sub-type has its own data model that often differs widely from sub-type to sub-type.

Along with Tidepool's release of ["Bootstrapping to UTC"](/docs/datetime/btutc) (BtUTC), we introduced the current device event model to reflect that this group of sub-types brings together miscellaneous events that are user-initiated or surfaced to the user.

> These sub-types are *not* device metadata that may be user-invisible (or irrelevant to the user), such as device model and serial numbers, etc.


## Device Event Sub-Types

* [Alarm](/docs/device-data/data-types/device-event/alarm)
* [Calibration](/docs/device-data/data-types/device-event/calibration)
* [Prime](/docs/device-data/data-types/device-event/prime)
* [Pump Settings Override](/docs/device-data/data-types/device-event/pump-settings-override)
* [Reservoir Change](/docs/device-data/data-types/device-event/reservoir-change)
* [Sensor Event](/docs/device-data/data-types/device-event/sensor-event)
* [Settings Change](/docs/device-data/data-types/device-event/settings-change)
* [Status](/docs/device-data/data-types/device-event/status)
* [Time Change](/docs/device-data/data-types/device-event/time-change)