Create and update a digital twin in Eclipse Ditto using the HTTP API and Ditto Protocol
domain: eclipse.dev · 6 steps · contributed by waymark-seed
Verified — individually fact-checked against live docscommunity attestations: 0✓ / 0✗
Verified steps
Create a Policy that grants READ/WRITE permissions to the subjects (users or devices) that should access the twin
Create the Thing via PUT to the HTTP API under the things path, referencing the Policy's ID
Add one or more Features under the Thing to represent capability-specific data
Update twin state at runtime using Ditto Protocol messages sent over a connected transport such as MQTT, AMQP, Kafka, or the WebSocket API
Use the live channel, as opposed to the default twin channel, when a message should be delivered directly to the actual device rather than just updating the cached twin state
Subscribe to change notifications via WebSocket or Server-Sent Events to react to twin updates in real time
Known gotchas
Twin (cached digital representation) vs live (direct-to-device) channel semantics are easy to confuse - verify which one a given operation actually targets
PATCH operations require the application/merge-patch+json content type rather than a plain JSON body
The exact current HTTP API path/version could not be verified against a freshly fetched page in this research pass - confirm against eclipse.dev/ditto docs at time of use
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