Limitations¶

It is recommended that you read the following before you start using any models, products, devices, logical assets, asset trees, firmware upgrades, etc. The limitations listed here are applicable to each OU(Organization Unit).

The limitations listed in this document are default limitations. You can contact the OU administrator to expand the limitations as needed. The effect range of the expansion can be divided into the following:

This environment: the expanded limitations will be effective in each OU of this environment.
This OU: the expanded limitations will be effective in this OU only.

General¶

The following general limitations apply simultaneously to models, attributes, measurement points, services, events, products, devices, logical assets, firmware, and asset trees. For example, if the number of tags that can be added to a single model is extended, the number of tags that can be added to the other objects mentioned above will also be extended within the effect range.

Item	Limit	Effect Range of Expansion
Max number of tags for each model/attribute/measurement point/service/event/product/device/logical asset/firmware/asset tree	100	This environment
Tag key	Supports only letters, numbers, underscore (_), hyphen (-), and slash (/) Max 50 characters	This environment
Tag value	Does not support starting or ending with whitespace Max 200 characters	This environment

Connectivity¶

Item	Limit	Effect Range of Expansion
Max number of MQTT connections per second per device	1	This environment
Max MQTT report limit per second per device	1M	This environment
Max MQTT downlink reception limit per second per device	1M	This environment
Max length of one MQTT publish message	512KB	This environment
Time range of MQTT heartbeat	60 - 300 seconds	This environment
Max number of CoAP connections per second per device	1	This environment
Max CoAP report limit per second per device	10KB	This environment
Max CoAP downlink reception limit per second per device	10KB	This environment
Max length of one CoAP publish message	1KB	This environment
Max length of HTTP report body	512KB	This environment
Max number of connection requests for a device when the device request connection is not limited	4 times within 2 minutes, limited to 5 minutes	This environment

Models¶

Item	Limit	Effect Range of Expansion
Max number of private models	1,000	This OU
Max number of attributes for each model	200	This environment
Max number of measurement points for each model	5,000	This environment
Max number of services for each model	50	This environment
Max number of events for each model	50	This environment
Max number of files in the ZIP when importing models	20	This environment
Max ZIP file size when importing models	2M	This environment
Max number of models that can be exported	20	This environment
Max number of items for enum data type	200	This environment
Max number of items for array data type	1,024	This environment
Model identifier	1 - 64 characters Supports only English alphabets, numbers, and special characters -_.	This environment
Model name	1 - 64 characters Does not support <>;@*%&\	This environment
Model category	Max 64 characters Does not support <>;@*%&\	This environment
Model description	Max 1,024 characters	This environment
Attribute/measurement point/service/event identifier	1 - 64 characters Supports only English alphabets, numbers, and special characters -_.	This environment
Attribute/measurement point/service/event name	1 - 64 characters	This environment
Attribute/measurement point/service/event description	Max 1,024 characters	This environment
String data type for attribute	Max 4,000 characters	This environment
String data type for measurement point	Max 1,024 characters	This environment

Products¶

Item	Limit	Effect Range of Expansion
Max number of products	2,000	This OU
Max number of devices that can be created under one product	10,000	This environment
Max number of products that can be batch imported at any one time	1000	This environment
Max file size when importing products	5M	This environment
Max number of products that can be exported	1,000	This environment
Max size of script for data parsing	48KB	This environment
Product name	1 - 64 characters Does not support <>;@*%&\	This environment
Product description	Max 512 characters	This environment

Devices¶

Item	Limit	Effect Range of Expansion
Max number of assets	200,000	This OU
Max number of device assets	100,000	This OU
Max number of devices that can be created in a batch	1,000	This environment
Max file size for each Excel file when importing devices	3M	This environment
Max ZIP file size when importing devices	10M	This environment
Max number of devices that can be exported	1,000	This environment
Max number of sub-devices that can be added under a gateway device	10,000	This environment
Max number of cache commands supported per device	50	This environment
Storage duration for a history service invoked per device	15 days	This environment
Storage duration for events reported per device	15 days	This environment
Storage duration for the behavior log for one device	15 days	This environment
Storage duration for cloud logs	8 days	This environment
Storage duration for device logs	8 days	This environment
Cloud log throttling period*	1 minute	This environment
Max number of cloud logs for all devices under this OU within the throttling period	100,000	This environment
Max number of cloud logs for all devices under the same product within the throttling period	1,000	This environment
Max number of cloud logs for a single device within the throttling period	100	This environment
Max storage size for device files	0.1T (modifiable in Resource Management)	This OU
Device key	4 - 64 characters Supports only English alphabets, numbers, and special characters -_.	This environment
Device name	1 - 64 characters Does not support <>;@*%&\	This environment
Device description	Max 512 characters	This environment

If the number of logs exceeds the limit during the throttling period, logging will be stopped. At the start of the next period, the log count will be reset, and logging will resume.

Logical Assets¶

Item	Limit	Effect Range of Expansion
Max file size for each Excel file when importing logical assets	3M	This environment
Max ZIP file size when importing logical assets	10M	This environment
Max number of logical assets that can be exported	10,000	This environment
Logical asset name	1 - 64 characters Does not support <>;@*%&\	This environment
Logical asset description	Max 512 characters	This environment

Device Simulators¶

Item	Limit	Effect Range of Expansion
Max number of simulated devices	300	This OU
Max time range that can be simulated by the device simulator	90 days	This environment
Max device simulator sample file size	50M	This environment
Device simulator file name	Supports English alphabets and numbers	This environment

Firmware Upgrades¶

Item	Limit	Effect Range of Expansion
Max number of firmware	256	This OU
Max number of OTA tasks that can be opened at the same time	256	This environment
Max number of devices that can be upgraded per batch upgrade	100,000	This environment
Max firmware file size	100M	This environment
Supported firmware signature algorithm	MD5 and SHA256	This environment
Firmware name	1 - 64 characters Does not support <>;@*%&\	This environment
Firmware version	1 - 128 characters Supports English alphabets, numbers, and special characters ._	This environment
Firmware description	Max 512 characters	This environment
OTA job name	1 - 64 characters Does not support <>;@*%&\	This environment
OTA job maximum task concurrency	Max 100,000, default 300	This environment
OTA job upgrade timeout	5 to 2,880 minutes, default 120 minutes	This environment

Asset Trees¶

Item	Limit	Effect Range of Expansion
Max number of asset trees	100	This OU
Max layers that an asset tree can have	7	This environment
Max number of individual assets that can be added in the same tree	1	This environment
Max ZIP file size when importing asset trees	5M	This environment
Max number of asset trees that can be batch imported at any one time	50	This environment
Max number of asset nodes that can be batch imported for an asset tree at any one time	50,000	This environment
Max number of asset trees that can be exported	50	This environment
Max file size when exporting asset trees	5M	This environment
Max number of sub-nodes that can be added to a single asset node	10,000	This environment
Max number of assets that can be associated at any one time	1,000	This environment
Max number of assets that can be removed at any one time	20,000	This environment
Asset tree name	1 - 64 characters Does not support <>;@*%&\	This environment
Max number of nodes in the asset tree that can be exported	50,000	This environment