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- What's New
- Product Bulletin
- Service Overview
- Billing
-
Getting Started
-
Quick Device Access - Property Reporting and Command Receiving
- Subscribing to IoTDA
- Connecting a Smart Smoke Detector to the Platform (Quick Usage)
- Registering a Simulated Smart Street Light Device
- Using MQTT.fx to Simulate Communication Between the Smart Street Light and the Platform
- Using a Virtual Smart Street Light to Communicate with the Platform (Java SDK)
- Using a Virtual Smart Street Light to Communicate with the Platform (C SDK)
- Quick Device Access - Message Sending and Receiving
- Quick Application Access
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Quick Device Access - Property Reporting and Command Receiving
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User Guide
- Overview
- IoTDA Instances
- Resource Spaces
- Device Access
- Message Communications
- Device Management
-
Rules
- Overview
- Data Forwarding Process
- SQL Statements
- Connectivity Tests
- Data Forwarding to Huawei Cloud Services
- Data Forwarding to Third-Party Applications
- Data Forwarding Channel Details
- Data Forwarding Stack Policies
- Data Forwarding Flow Control Policies
- Abnormal Data Target
- Device Linkage
- Monitoring and O&M
- Granting Permissions Using IAM
-
Best Practices
- Introduction
-
Device Access
- Developing an MQTT-based Simulated Smart Street Light Online
- Developing a Smart Street Light Using NB-IoT BearPi
- Developing a Smart Smoke Detector Using NB-IoT BearPi
- Connecting and Debugging an NB-IoT Smart Street Light Using a Simulator
- Developing a Protocol Conversion Gateway for Access of Generic-Protocol Devices
- Connecting a Device That Uses the X.509 Certificate Based on MQTT.fx
- Connecting to IoTDA Based on the BearPi-HM_Nano Development Board and OpenHarmony 3.0
- Testing MQTT Performance Using JMeter
- Device Management
- Data Forwarding
- Device Linkage
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Developer Guide
- Before You Start
- Obtaining Resources
- Product Development
- Development on the Device Side
- Development on the Application Side
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API Reference
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API Reference on the Application Side
- Before You Start
- Calling APIs
- API Overview
-
API
- Product Management
- Device Management
- Device Message
- Device Command APIs
- Device Property
- AMQP Queue Management
- Access Credential Management
- Data Forwarding Rule Management
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Transition Data
- Push a Device Status Change Notification
- Push a Device Property Reporting Notification
- Push a Device Message Status Change Notification
- Push a Batch Task Status Change Notification
- Push a Device Message Reporting Notification
- Push a Device Addition Notification
- Push a Device Update Notification
- Push a Device Deletion Notification
- Push a Product Addition Notification
- Push a Product Update Notification
- Push a Product Deletion Notification
- Push an Asynchronous Device Command Status Change Notification
- Rule Management
- Device Shadow
- Group Management
- Tag Management
- Instance Management
- Resource Space Management
- Batch Task
- Device CA Certificate Management
- OTA Upgrade Package Management
- Message Broadcasting
- Device Tunnel Management
- Stack policy management
- Flow control policy management
- Device Proxy
- Device Policy Management
- Bridge Management
- Pre-provisioning Template Management
- Custom Authentication
- Codec Function Management
- Permissions and Supported Actions
- Examples
- Appendix
-
MQTT or MQTTS API Reference on the Device Side
- Before You Start
- Communication Modes
- Topics
- Device Connection Authentication
- Device Commands
- Device Messages
- Device Properties
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Gateway and Child Device Management
- Platform Notifying a Gateway of New Child Device Connection
- Platform Notifying a Gateway of Child Device Deletion
- Gateway Synchronizing Child Device Information
- Gateway Updating Child Device Status
- Responding to a Request for Updating Child Device Statuses
- Gateway Requesting for Adding Child Devices
- Platform Responding to a Request for Adding Child Devices
- Gateway Requesting for Deleting Child Devices
- Platform Responding to a Request for Deleting Child Devices
- Software and Firmware Upgrade
- File Upload and Download
- Device Time Synchronization
- Device Reporting Information
- Device Log Collection
- Remote Configuration
- Device Tunnel Management
- HTTPS API Reference on the Device Side
- LwM2M API Reference on the Device Side
- Security Tunnel WebSocket API Reference
- Module AT Command Reference
- Change History
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API Reference on the Application Side
- SDK Reference
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FAQs
- Top FAQs
-
Solution Consulting
- In What Scenarios Can the IoT Platform Be Applied?
- What Are the Changes Brought by the Integration of IoT Device Management and IoTDA?
- Can I Enable IoTDA for IAM Users or Sub-Projects?
- Which Regions of Huawei Cloud Are Supported by the IoT Platform?
- Does Huawei Provide Modules, Hardware Devices, and Application Software?
- What Should I Do If I Want to Call an API But Have No Permissions to Do So as an IAM User? (Is It Edition-specific?)
- Why Was I Prompted to Grant Security Administrator Permissions When I Create a Rule or Set Resource File Storage?
- Which Resource Space Will Be Set As Default on the IoT Platform?
- How Does IoTDA Obtain Device Data?
- Is There Any Limitation on the Number of Resource Spaces and Devices I Can Add on the IoT Platform?
- Does the IoTDA Support Device Registration in Batches?
- Are There Any Limitations on the Use of the IoT Platform?
- What DTLS Encryption Algorithms Are Supported by the IoT Platform?
- Does the IoT Platform Support Conversion Between Big-Endian and Little-Endian for Binary Data?
- What Is NB-IoT?
- What Are the Components of the IoT Platform and What Hardware Architectures Does It Support?
- How Do I Obtain the Platform Access Address?
- Device Integration
- IoT Device SDKs
- LwM2M/CoAP Device Access
- MQTT-based Device Access
- Products Models
- Message Communications
- Subscription and Push
- Codecs
- OTA Upgrades
- Application Integration
- General Reference
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IoT Device SDK (C)
The IoT Device SDK (C) provides abundant demo code for devices to communicate with the platform and implement device, gateway, and Over-The-Air (OTA) services. For details on the integration guide, see IoT Device SDK (C) Development Guide.
Requirements
- The SDK runs on Linux.
- The SDK depends on the OpenSSL and Paho libraries. If you have your own compilation chain, compile library files such as OpenSSL, Paho, zlib, and Huawei secure function library.
- For some devices that are connected in MCU+module mode, use the C Tiny SDK for development.
Change History
|
Version |
Change |
Description |
|---|---|---|
|
1.2.0 |
Function enhancement |
Added the SDK test code and demo, and optimized the code usage. |
|
1.1.5 |
Function enhancement |
Updated the OTA upgrade transmission format. |
|
1.1.4 |
Function enhancement |
Fixed the issue of remote login packet reporting timeout. |
|
1.1.3 |
Function enhancement |
Updated the conf\rootcert.pem certificates. |
|
1.1.2 |
New function |
Added device rules, M2M, GN compilation file, anomaly detection, timestamp printed in logs, MQTT_DEBUG, Chinese cryptographic algorithm, remote configuration, and device-cloud secure communication (soft bus). |
|
1.1.1 |
New function |
Added SSH remote O&M. |
|
1.1.0 |
New function |
Supported MQTT 5.0. Optimized the cod to resolve the memory overflow issue. |
|
1.0.1 |
Function enhancement |
Added application scenarios, where MQTTS does not verify the platform public key, using TLS version is V1.2, and adding message storage examples. |
|
0.9.0 |
New function |
Added the API for the gateway to update the child device status. |
|
0.8.0 |
Function enhancement |
Added the access domain name (iot-mqtts.cn-north-4.myhuaweicloud.com) and root certificates. If the device uses the old domain name (iot-acc.cn-north-4.myhuaweicloud.com) for access, use the v0.5.0 SDK. |
|
0.5.0 |
Function enhancement |
Preset the device access address and the matching CA certificate in the SDK to support interconnection with the Huawei Cloud IoT platform. |
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