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Yandex IoT Core
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  1. Concepts
  2. Topic
  3. Registry topics

Registry topics

Written by
Yandex Cloud
Updated at August 6, 2026
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Warning

Yandex IoT Core is no longer available to new users.

Current users can create resources until November 1, 2026. Afterwards, the service will go read-only and cease to operate on December 1, 2026. For more information on the timing and procedure, see Service shutdown.

Registry topics available in the service:

  • $registries/<registry_ID>/events: Topic for receiving telemetry data.

  • $registries/<registry_ID>/state: Permanent topic for receiving telemetry data.

    The device can write data to these topics and the registry can read the data from them. The registry subscribed to these topics will not know which device sent the data, as the topic does not contain a unique device ID.

  • $registries/<registry_ID>/commands: Topic for sending commands.

  • $registries/<registry_ID>/config: Permanent topic for sending commands.

    The registry can write data to these topics and the device can read data from them. The registry sends commands for all devices to these topics.

Warning

Registry topics and device topics are independent of each other. If a device sends data to a device telemetry topic, you can only receive this data by subscribing to that topic. The same applies to registry topics.

Use casesUse cases

  • Sending a message using Mosquitto

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