Billing Items

Billing Description

Fees of IoTDA consist of instance fees and message fees. For details, see Table 1.

**Table 1** IoTDA billing items
Billing Item	Description	Billing Mode	Formula
Instance specifications	Standard and enterprise editions are charged based on the instance type, specifications, and purchase duration.	Pay-per-use	Instance specifications unit price x Purchase duration For details, see "Specifications Price" in IoTDA Price Details.

Item	Description	Billing Mode
Device messages	Messages sent by devices by calling the MQTT PUB interface	The number of messages is charged.
	Messages received by devices by calling the MQTT SUB interface
	Messages sent by devices by calling the LwM2M Update/Notify interface
	Response messages received by devices by calling the LwM2M Update interface
	Messages and properties reported by devices by calling the HTTP interface
	Command messages sent by the platform by calling the LwM2M Read/Write/Write-Attributes/Execute interface and response messages reported by devices
Application messages	Messages sent by applications by calling platform APIs	The number of messages is charged.
Messages forwarded by rules	Messages forwarded to other Huawei Cloud services using rules	If there are fewer forwarded messages than messages sent from devices to the cloud, the forwarded messages are free of charge. If not, the excess forwarded messages are charged.
Messages forwarded by rules	Messages pushed by the platform to applications (including HTTP and AMQP messages)	The number of messages is charged.
Protocol messages	Login messages Logout messages Heartbeat messages ACK messages at the protocol layer Subscription messages Unsubscription messages	Free
OTA upgrade	You will be billed for using OBS to store upgrade packages. For details, see Software/Firmware Package Upload.	OTA upgrade is free, but OBS is charged.

Billing Examples

Assume you purchased a standard SU1 instance at 15:50:04 on March 8, 2023 and then deleted it at 15:50:04 on March 10, 2023. The following usage periods will be billed:

The first billing cycle: March 8, 2023, 15:50:04 to March 9, 2023, 00:00:00
The first billing cycle: March 9, 2023, 00:00:00 to March 10, 2023, 00:00:00

You need to pay for each billing cycle.

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