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Use Limits

Last updated: 2022-03-11 18:29:12

    Device Connection

    Item Description Limit
    Products Maximum number of products that can be created under a single account 2,000
    Devices Maximum number of devices that can be added under a single product 1,000,000
    Gateways and subdevices Maximum number of subdevices that can be added under a single gateway 1,500
    Device groups Maximum number of parent groups and subgroups in total allowed for a single account Unlimited
    Maximum number of devices that can be added to a single group Unlimited
    Maximum number of groups that a single device can be added to Unlimited
    Remote configuration Maximum size of the remote configuration file (supports JSON format only) 128KB
    Cloud log Storage period of cloud logs generated by device operations 7 days
    File management Maximum size of all files that can be stored in the IoT Hub server for a single account 1GB
    Maximum number of files that can be stored for a single device 1,000
    OTA update Maximum size of a single update package file allowed 2,048 MB
    Maximum number of devices that can be updated in a single batch update 100,000

    Message Communication

    Item Description Limit
    Device connection With the same device certificate information, only one connection can be established with the platform server concurrently. Yes
    Connection requests Maximum number of MQTT connection requests per second allowed for a single device 1 request/5s
    Device subscriptions Maximum number of subscriptions allowed for a single device Unlimited
    Requests Number of requests sent from the device side to the IoT Hub platform per second allowed for a single account Unlimited
    Number of requests sent from the IoT Hub platform to the device side per second allowed for a single account Unlimited
    Message communication Maximum number of messages that a single device can report per second 30
    Maximum number of messages that a single device can receive per second (subject to the network environment) 50
    Bandwidth Maximum throughput (bandwidth) per second allowed for a single connection Unlimited
    Message storage period Maximum storage time of QoS1 messages 7 days
    MQTT message size

    Maximum size allowed for a single published MQTT message. If this limit is exceeded, the publish request will be rejected.

    16KB
    CoAP message size Maximum size allowed for a single published CoAP message. If this limit is exceeded, the publish request will be rejected. 1KB
    MQTT keepalive MQTT connection heartbeat time. If the heartbeat time is not within this limit, the server will reject the connection request. 900s
    RRPC timeout period Timeout period of device response to RRPC request 10s
    Offline message Number of offline messages Up to 150 messages per device
    Storage period of offline messages Messages can be stored for up to 24 hours.
    `KeepAlive` value Value range of `KeepAlive` 0-900s

    Topic

    Item Description Limit
    Custom topic classes Maximum number of custom topic classes allowed for a single product 100
    Topic length Maximum length of a topic allowed 255 UTF-8 encoded characters
    Topic levels Maximum number of hierarchical levels that can be contained in a topic, that is, maximum number of slashes in a topic 10
    Subscriptions Maximum number of subscriptions allowed per subscribe request 1
    Operation effective time Effective time of a subscription or unsubscription operation 5s
    Broadcast topic Restrictions on the body of the message to broadcast Max 8 KB. The original message must be converted into binary data and encoded with Base64 to generate the message body.
    Message broadcasts by the server side to all devices per minute A single product can perform only one task at a time.

    Rule Engine

    Item Description Limit
    Rules Maximum number of rules that can be set for a single account 1,000
    Data forwarding destinations Maximum number of data forwarding actions allowed in a rule 10
    Messages processed by rule engine The data processing capability of an account Unlimited
    Written message count The data forwarding capability of an account when the performance of the target cloud product instance is sufficient Unlimited
    Requirements of data forwarding destinations Data forwarding depends on the target product. Make sure that the instance of the target cloud product runs properly. Message forwarding fails in multiple scenarios. These scenarios include instance failure, overdue payments, parameter error, and configuration error. The instance must run properly.
    Message deduplication When you forward a message, the message may be repeatedly sent until the client returns ACK or the message expires. Unlimited. Each message has a unique ID.

    Device Shadow and Server-Side Subscription

    Item Description Limit
    JSON levels Maximum number of levels that can be specified in a device shadow JSON file 5
    File size Maximum size of a device shadow JSON file 16KB
    Attributes Maximum number of attributes that can be specified in a device shadow JSON file Unlimited
    Requests per second Maximum number of requests per second per device Unlimited
    Retry policy upon push failure Due to the consumer client being disconnected and the slow consumption of messages, messages cannot be consumed in real time and instead enter the stacked queue. Unlimited
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