“STM32 + LoRa” Preparation & Config Parameters

[简体中文]

LoRa Node 151 is based on STM32L151CCU6, Turtle Board is based on STM32L432KC, Our company is gradually replacing the IDE to STM32CubeIDE, which is the STMicroelectronics official just launched development tools for their own MCUs. Based on Eclipse, include code tracking, code completion, compilation, download, single-step debugging, and integrated with CubdeMX.

Summary

No matter what LoRa management platform is used, DevEui, AppKey, etc. parameters are must needed. And ensure that it is consistent with the relevant settings on the server.

  • The following parameters are essential for OTAA mode:

    • DevEui – Mote device IEEE EUI (big endian), 8 bytes;

    • AppEui – Application IEEE EUI (big endian), 8 bytes;

    • AppKey – AES encryption/decryption cipher application key, 16 bytes;

  • The following parameters are essential for ABP mode:

    • NwkSKey – AES encryption/decryption cipher network session key, 16 bytes;

    • AppSKey – AES encryption/decryption cipher application session key, 16 bytes;

    • DevAddr – Device address on the network (big endian), uint32_t;

 

Preparation

 

Config steps

The LoRaWAN example code of LoRa Node is a STM32CubeIDE project, here is the basic config steps.

  • Download and install STM32CubeIDE and STM32CubeProgramme correctly.

  • Double click .project document, open project.

The first time you run, may have the following dialog box will, click Yes and then OK.

 

  • Modify macro definition: Set working bands、working mode and debugger.

    • ACTIVE_CLASS

      CLASS_A

      CLASS_B–NOT SUPPORT

      CLASS_C

    • ACTIVE_REGION

      LORAMAC_REGION_AS923

      LORAMAC_REGION_AU915

      LORAMAC_REGION_CN470

      LORAMAC_REGION_CN779

      LORAMAC_REGION_EU433

      LORAMAC_REGION_EU868

      LORAMAC_REGION_KR920

      LORAMAC_REGION_IN865

      LORAMAC_REGION_US915

      LORAMAC_REGION_US915_HYBRID

      LORAMAC_REGION_AU915_SB2

      LORAMAC_REGION_AS923_AS1

      LORAMAC_REGION_AS923_AS2

    • REGION_EU868 Set to the frequency band corresponding to ACTIVE_REGION

    • USE_DEBUGGER

      If define USE_DEBUGGER , default serial port(PA9-TX, PA10-RX) can print debugging information.

      If delete USE_DEBUGGER , debugging information will not be printed.

  • Modify DEVICE_EUI, APPLICATION_KEY, APPLICATION_EUI in the main.c file according to your needs.

  • Modify userChannelMask , access mode overTheAirActivation and other parameter.

    • overTheAirActivation

      true–OTAA

      false–ABP

  • Write the data you want to send in prepareTxFrame.

Now, if download the program into your board, if everything is normal, it should be able to run.