Updated on 2022-02-24 GMT+08:00
FAQs
Product Use
Secondary Development
- FAQs About Product Development
- Profile Definition
- How to Develop a Profile
- Upload Is Unavailable When Uploading a Profile to the Developer Center
- Incorrect File Format Is Displayed When Uploading a Profile to the Developer Center
- Message Is Displayed Indicating That the Manufacturer ID and Device Model Exist When Uploading a Profile to the Developer Center
- How to Select a Data Type When Developing a Profile Online
- Profile Cannot Be Edited
- Plug-In Development
- How to Develop Codecs
- Failed to Deploy a Plug-in That Is Developed Online
- What Is the Code Rule for Fields of the string and varstring Types
- What Is the Code Rule for Fields of the array and variant Types
- Whether Plug-Ins That Are Developed Online Support Transparent Transmission
- How to Use messageId During Online Codec Development
- How to Configure a Command Delivery Response During Online Codec Development
- Failed to Deploy a Plug-in That Is Developed Offline
- Failed to Upload a Plug-in That Is Developed Offline
- Plug-In Package Developed Offline Has Been Checked But Cannot Be Found When Uploading to the IoT Platform
- Codec Exception Occurs After a Plug-In Package Developed Offline That Has Been Checked Is Uploaded to the IoT Platform
- Offline Signature Fails
- Device Development
- Registered Devices Cannot Connect to the IoT Platform
- Message 513 Is Reported When Devices Are Connected to the IoT Platform
- DTLS Encryption Algorithms Supported by the IoT Platform
- What Does CTNB Mean
- How to Select PSM, DRX, and eDRX
- Devices Cannot Receive Commands from the IoT Platform
- IoT Platform Does Not Receive Data Reported by Devices
- Historical Data Does Not Contain Data Reported By Devices While No Error Occurs
- Duration for Devices to Receive Commands
- Devices Fail to Receive Data Reporting Responses
- Data Reporting Is Successful at One Position But Fails at Another Position
- Command Status Is Not Changed to Successful After a Device Reports the Command Execution Result
- Whether the IoT Platform Can Switch Between the Big-Endian and Little-Endian
- Commands Fail to Be Delivered When a Device in DRX Mode Does Not Report Data in One to Two Days
- Profile Definition
- FAQs About Application Development
- Calling APIs
- Authentication API of the IoT Platform Is Successfully Called Locally But Fails to Be Called on Application Servers
- Error Occurs When an NA Calls an API
- Online Application Simulator Fails to Deliver Commands
- Command Is Successfully Delivered Using the Simulator But Fails to Be Delivered by Calling the API
- Application Server Fails to Deliver Commands and Receives Error Code 403
- How Does an Application Server Deliver a Cache Command
- What Does an Expired Command Mean
- Does the IoT Platform Support Command Resending
- What Does a Timeout Command Mean
- Can the IoT Platform Deliver Commands in Batches
- Are the APIs of the IoT Platform Called Only Using Java
- What Are the Command States on the IoT Platform
- Failed to Call the Calling the Registering Directly Connected Devices API
- APIs Fail To Be Called After a Period of Time While Parameters Remain Unchanged
- Commands Fail to Be Sent After a Period of Time While the Previous Commands Are Successfully Sent
- Historical Data Is Not Returned When the Querying Historical Device Data API Is Called
- Devices Registered with the IoT Platform Are Deleted After a Period of Time
- Subscription and Push
- Invalid Callback Address Occurs When Calling the Subscription API
- How to Obtain the subscriptionId When Calling the Querying Subscription in Batches API
- Application Server Fails to Receive Data Pushed by the IoT Platform
- How Do I Export the HTTPS Push Certificate
- Difference Between deviceDatachanged and deviceDataschanged
- How Does an Application Server Obtain the IMEI of Devices
- Application Server Receives Data But an Error Is Displayed on the IoT Platform
- Push Messages May Fail to Be Sent to Application Servers
- How Does an Application Servers Obtain The Address Used by the IoT Platform to Push Messages
- Does the IoT Platform Supports Re-push
- How Does an Application Server Receive a Command Status Change Notification
- Application Servers That Have Subscribed to Confirmation Notifications and Command Response Notifications Fail to Receive Push Messages
- Does the IoT Platform Support Only HTTPS Callback Addresses
- Can the IoT Platform Push Data Reported by Different Devices Under the Same Application to Two Servers
- Can a Subscription Address Be a Domain Name
- Can a Callback Address Be Changed
- Calling APIs
- FAQs About Software/Firmware Upgrade
- What Is Software/Firmware Upgrade
- Can IoT Platform Download Software/Firmware Packages From Third-party Servers
- Can the Target Version Be Earlier Than the Source Version?
- How Do I Obtain Software/Firmware Packages and Their Version Numbers
- Software/Firmware Upgrade Task Is Ended Immediately After Being Created
- What Is the Source Version Required for Uploading a Firmware Package on the Management Portal
- When Reporting Data, Devices Receive the Software/Firmware Version Query Command from the IoT Platform
- Are Services Interrupted During the Software/Firmware Upgrade
- What Are Common Software/Firmware Upgrade Errors
- Retry When Some Devices in the Group Failed to Be Upgraded
- Is Resumable Transmission Supported When the IoT Platform Sends Software/Firmware Packages to Devices
- Others
- Does the IoT Platform Support Device Registration in Batches
- Does the IoT Platform Perform Flow Control on Applications and Devices
- How Does an Application Server Obtain Data Reported by Devices to the IoT Platform
- Is the Maximum Number of Applications and Devices Restricted on the IoT Platform
- Why Is an Online Device Changed to an Abnormal or Offline State After a Period of Time
- Are Command Delivery and Data Reporting Successful After a Device Becomes Abnormal or Offline
- How Long Does a Device Receive an Immediately-Delivered Command in eDRX Mode
- How Long Is Data Stored on the IoT Platform
- Can Multiple Devices Use One IMEI
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