DigitalTwinsClient.PublishTelemetryAsync Method

Reference

Definition

Namespace:: Azure.DigitalTwins.Core

Assembly:: Azure.DigitalTwins.Core.dll

Package:: Azure.DigitalTwins.Core v1.4.0

Source:: DigitalTwinsClient.cs

Important

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Publishes telemetry from a digital twin asynchronously. The result is then consumed by one or many destination endpoints (subscribers) defined under DigitalTwinsEventRoute. These event routes need to be set before publishing a telemetry message, in order for the telemetry message to be consumed.

public virtual System.Threading.Tasks.Task<Azure.Response> PublishTelemetryAsync (string digitalTwinId, string messageId, string payload, DateTimeOffset? timestamp = default, System.Threading.CancellationToken cancellationToken = default);

abstract member PublishTelemetryAsync : string * string * string * Nullable<DateTimeOffset> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Azure.Response>
override this.PublishTelemetryAsync : string * string * string * Nullable<DateTimeOffset> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Azure.Response>

Public Overridable Function PublishTelemetryAsync (digitalTwinId As String, messageId As String, payload As String, Optional timestamp As Nullable(Of DateTimeOffset) = Nothing, Optional cancellationToken As CancellationToken = Nothing) As Task(Of Response)

Parameters

digitalTwinId: String

The Id of the digital twin.

messageId: String

A unique message identifier (within the scope of the digital twin id) that is commonly used for de-duplicating messages. Defaults to a random GUID if argument is null.

payload: String

The application/json telemetry payload to be sent.

timestamp: Nullable<DateTimeOffset>

An RFC 3339 timestamp that identifies the time the telemetry was measured. It defaults to the current date/time UTC.

cancellationToken: CancellationToken

The cancellation token.

Returns

Task<Response>

The HTTP response Response.

Exceptions

RequestFailedException

The exception that captures the errors from the service. Check the ErrorCode and Status properties for more details.

ArgumentNullException

The exception is thrown when digitalTwinId or payload is null.

Examples

// construct your json telemetry payload by hand.
await client.PublishTelemetryAsync(twinId, Guid.NewGuid().ToString(), "{\"Telemetry1\": 5}");
Console.WriteLine($"Published telemetry message to twin '{twinId}'.");

Remarks

For more samples, see our repo samples.

Applies to