OneNET IoT Platform Platform Introduction Introduction Manual Guidline for Device Development Guideline for Application Development
API
API Usage API List SDK MQTT LwM2M EDP Modbus TCP
HTTP Push MQ
Other Service Common Question

Usage Limit

The usage limits of MQ beta version are as follows:

Service Limit

Restriction content Restriction value Description
Total topics a user can create in single MQ service 5
Total subscriptions a user can create in single topic 5
Message body size 256k Overrun messages will be discarded
Message expiration time in topic 30s-7 days beta version defaults to 3600s (1 h), i.e. The system will reclaim messages that entered the queue for over 1 h
Topic cache space size 1G beta version defaults to 1G, and configuration is not supported.The service will reclaim the space occupied by the unexpired message from the head when the queue data volume overruns
Single topic consumption message rate 1000 / sec The calculation of the number of messages: in 1k, and ceil
Example 1: 1.5k into the queue, consumed by 1 client, the message is calculated as 2 pieces
Example 2: 1k into the queue, consumed by 3 clients, calculated as 3 pieces
Subscription message lock time 10-60s The default is 0, i.e., the message is not locked. If the setting is >0, it means the message lock is enabled
e.g. If the setting is 10s, and the client does not return ack after consuming the data, the unconfirmed message will be consumed again after 10s
Subscription consumption location no The default is 0, i.e. consumption from the head of the queue.
Single client non-service message frequency restriction 60/s For the frequency restriction of sending Ping, Subscribe, and Unsubscribe messages, it will be disconnected when overruns

Protocol Limits

Functions Support Or Not Description
Connect Support The connection message sent by the client to MQ, connect flag must be 0xC2, otherwise it will be disconnected
keepalive Support Range: 30~4800s
will Not support will, will retain flag must be 0, will qos must be 0
session Not support cleansession tag must be 1
ConnAck Support Reverse of connection response that MQ replies to the client will disconnect
Publish Support MQ pushes messages to the client
PubAck Support The client replies when receives the push message from MQ
Subscribe Support The message of topic subscription sent by the client to MQ
SubAck Support Reverse of subscription reply from Q to the client will disconnect
Unsubscribe Support The message of cancel of topic subscription sent by the client to MQ
UnsubAck Support Reverse of the reply of cancel of subscription from MQ to the client will disconnect
Ping Support The Ping message sent by the client to MQ
PingResp Support Reply from the Ping message sent by MQ to the client
Disconn Support Offline message sent by the client to MQ
PubRec Not support The client sending a message of this type will disconnect
PubRel Not support The client sending a message of this type will disconnect
PubComp Not support The client sending a message of this type will disconnect

Rule Limits

Restriction content Restriction value Description
Number of single product rules 10 Up to 10 rules can be configured in single product

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