使用IoT设备告警

ThingsBoard provides the ability to create and manage alarms related to your entities: devices, assets, customers, etc.

ThingsBoard提供为设备、资产、客户等实体创建告警，管理警报的功能。

警报生命周期

Alarms have a lifecycle. Each Alarm can be cleared and acknowledged. By default, an alarm is not in the active and unacknowledged state.

警报有一个生命周期。每一个警报都可以被清除和确认。默认情况下，警报为非活跃、未确认状态。

警报源、类型以及传播

Alarm Originator is an entity that is responsible for triggering an alarm. By default, an alarm is propagated to all related entities (parent relations only). An alarm is identified by start time, originator and type. There can’t be two active alarms for a same type and originator.、

警报源指触发警报的实体。默认情况下警报将被传播到所有相关实体。可根据警报起始时间、警报源以及警报类型识别警报。相同警报类型和警报源只能有一个活跃的警报。

警报级别

One of the following alarm severities is supported: CRITICAL, MAJOR, MINOR, WARNING, INDETERMINATE.

警报级别包括：严重、重要、一般、警告、情况不明。

警报更新

Alarm entity may be updated by external applications or ThingsBoard rules. Alarm keeps track of both clear and acknowledge time and latest change as an end time.

可使用外部应用或ThingsBoard规则更新警报实体。警报会追踪清除的时间，确认的时间，以及最近变化作为结束时间。

Alarm REST API

ThingsBoard provides REST API to manage and query alarms. See demo environment Alarm REST API and general REST API documentation for more details.

警报规则

It is possible to generate alarm using ThingsBoard rule engine.

可使用ThingsBoard规则引擎生成警报。