Monitor live data

3 min

Watch messages from one topic in the browser.

Start a live stream

Open a topic from Explore or the global search bar.

Select Live Stream.

Select Start Streaming.

Confirm that messages appear while the source publishes to the topic.

Select Stop Streaming when you finish.

The page displays numeric values in a chart and messages in a table. A connected stream with no messages does not prove that the source is publishing.

The live display uses a bounded buffer. Use a historian when you need a retained measurement history.

Read the stream

Numeric values appear in a chart. Use the chart to see how a value changes while the source publishes.

Numeric topic values displayed as a time series

Messages with structured values appear in a table with their timestamps.

Live message table showing timestamps and structured values

Expand a message to inspect its complete payload.

Expanded live message showing its JSON payload

What's next

See REST API reference to retrieve values or open a server-sent event stream from another application.