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Alexa.TemperatureSensor Interface

The Alexa.TemperatureSensor interface capability can be assigned to an endpoint that can sense temperature. This interface does not define any directives or events, but responds to ReportState directives with a StateReport events.

Directives

This control and query directives in this interface are supported in skills that target the following languages:

  • English (Canada)
  • English (UK)
  • English (US)
  • German

See Develop Smart Home Skills in Multiple Languages for more information.

ReportState

A ReportState directive is sent to request the state of an endpoint. The endpoint appliance-001 in this case, is specified in the message.

Example ReportState Request

{
  "directive": {
    "header": {
      "messageId": "abc-123-def-456",
      "correlationToken": "abcdef-123456",
      "namespace": "Alexa",
      "name": "ReportState",
      "payloadVersion": "3"
    },
    "endpoint": {
      "endpointId": "appliance-001",
      "cookie": {},
      "scope":{  
            "type":"BearerToken",
            "token":"access-token-from-skill"
      }
    },
    "payload": {
    }
  }
}

Properties and Events

For this interface, you must reply:

  • Synchronously, which means you send a Response to Alexa in from the Lambda function.

When you send a Response, you should include the state of reportable properties in the context of the message

Reportable Properties

Property Name Type Description
temperature Temperature A temperature for the endpoint that contains a temperature value and scale.

StateReport Event

Reports the state of the endpoint.

StateReport example

{
  "context": {
    "properties": [ {
      "namespace": "Alexa.TemperatureSensor",
      "name": "temperature",
      "value": {
        "value": 24.0,
        "scale": "CELSIUS"
      },
      "timeOfSample": "2017-02-03T16:20:50.52Z",
      "uncertaintyInMilliseconds": 1000
    } ]
  },
  "event": {
    "header": {
      "namespace": "Alexa",
      "name": "StateReport",
      "payloadVersion": "3",
      "messageId": "5f8a426e-01e4-4cc9-8b79-65f8bd0fd8a4",
      "correlationToken": "dFMb0z+PgpgdDmluhJ1LddFvSqZ/jCc8ptlAKulUj90jSqg=="
    },
    "endpoint": {
      "endpointId": "appliance-001"
    },
    "payload": {}
  }
}

Additional Sample Code

See the sample request and response messages in the Alexa smart home GitHub repo:

TemperatureSensor

Interface Description
Alexa.ThermostatController Describes directives and events related to changing settings of a thermostat endpoint