Yandex IoT Core

Getting started
Step-by-step instructions
- All instructions
- Sending messages
- Subscribing a device or registry to receive messages
- Viewing the connection log
- Creating a trigger for a topic
- Managing registries
- Managing devices
  - Managing topic aliases
  - Getting information about devices
  - Creating a device
  - Updating a device
  - Deleting a device
- Managing certificates
- Managing passwords
  - Managing registry passwords
  - Managing device passwords
Concepts
Use cases
Access management
Pricing policy
API reference
- Authentication in the API
- gRPC
- REST
  - Overview
  - Device
  - DeviceData
    - Overview
    - publish
  - Registry
  - RegistryData
    - Overview
    - publish
Questions and answers

Quotas and limits

Yandex IoT Core has the following limits:

Quotas are organizational restrictions that can be changed by technical support on request.
Limits are technical restrictions due to the Yandex.Cloud architecture specifics. The limits cannot be changed.

Limits

Type of limit	Value
Maximum size per message	256 KB
Frequency of sending messages per device	No more than once per second
Maximum length of the subtopic name	1024 symbols
Maximum number of aliases per device	5

Note

Message delivery is not guaranteed if the limits are exceeded.

Other restrictions

The Retain flag is not supported. When using it, the MQTT broker saves the flagged message and sends it the next time you subscribe a device or registry to a topic.
Persistent Sessions, when the MQTT broker saves information about a client (device or registry) to reconnect faster, aren't supported.