• hardware: CTWingSKIT_BC28 Development Toolkit

• serial port driver: ST-LINK

• hardware development environment: Keli 5 MDK

• IoT platform: CTWing AEP

• platform access protocol: LWM2M

• Install ST-Link Driver: https://www.st.com/en/development-tools/stsw-link009.html

• Install Keli 5 MDK-ARM: https://www.keil.com/demo/eval/arm.htm

• Install package for STM32F103CB in Keli 5. Config the settings according to the tutorial.

• Download the sample program and import to the IDE. Config the address and port of the IoT platform.

• Compile and load to the board. The board will run the program automatically.

• Apply for a rent account on CTWing (real-name certification required).

• Open the IoT Enablement Service.

• Get the product id, device id, master API key, app key, app secret.

  • Create a product (Choose “智慧农业→最佳实践→NB开发板”)
  • Register the device (several seconds before activated)
  • Create an application.

• Download Development SDK on the page of application.

**hint: **the SDK includes all the API functions significant to the backend of web service.

• Make sure the development board is powered on and the program has been burned in.
• Issue the instructions of ‘set_auto_control’ and ‘set_report_period’. (Then board will upload data of sensors regularly)
• Start the web service to get data through API functions. The business functions are running based on it.

Do this each time when the sensor board is powered on.

• Website: https://www.ctwing.cn/
• Log in with username & password
• Enter the AEP console
• Issue instructions:
  • Device management → Product → Portal Monitor → Device management → Command issuance
  • issue: set_auto_control & set_report_period
• View data report and event report:
  • Device management → Product → Portal Monitor → Device management → Click on the device name
  • view the corresponding information bar (need to select the time period)

Error: L6050U: The code size of this image exceeds the maximum allowed for this version

• official solution: https://developer.arm.com/documentation/ka002709/latest

• piracy solution:

  https://blog.csdn.net/qq_20250067/article/details/107619342

  https://www.jianshu.com/p/a9ff5abb9af7

Link for Manuals