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This guide demonstrates porting an Edge Impulse Zephyr application from the Nordic nRF7002 DK to the Silicon Labs EFR32xG24. The same principles apply to any Zephyr-supported boards.
This tutorial assumes you’ve already set up a Zephyr project with the Edge Impulse SDK module and deployed your model. If not, follow the Edge Impulse Zephyr Module Deployment guide first.

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Ideal for porting

Because Zephyr standardizes:
  • GPIO
  • UART
  • I2C/SPI
  • Threads + timing
  • Logging
  • Build system

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Prerequisites

  • Existing Zephyr project with Edge Impulse integration
  • Target board hardware and datasheet
  • Zephyr SDK installed
  • West meta-tool installed

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Hardware Comparison

Understanding the differences between your source and target boards is crucial for successful porting:
FeatureNordic nRF7002 DKSilicon Labs xG24
MCUnRF5340 (dual-core Cortex-M33)EFR32MG24 (single-core Cortex-M33)
WirelessWi-Fi (nRF7002)BLE/Zigbee
Flash1 MB1 MB
RAM512 KB256 KB
GPIO NotationP0.xx, P1.xxPAxx, PBxx, PCxx
Devicetree Bindingsnordic,nrf-*silabs,gecko-*

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Step 1: Update Build Target

The first step is changing your board identifier:
Build the Nordic nRF7002 DK

Build the Nordic nRF7002 DK

I’m using pristine builds to ensure no residual artifacts interfere. 
 west build -b nrf7002dk/nrf5340/cpuapp --pristine
You can also update .west/config to make this permanent: 
[build]
board = xg24_dk2601b/efr32mg24b310f1536im48

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Step 2 : Flash and Test

For specific programmers: 
# J-Link
west flash --runner jlink

# OpenOCD
west flash --runner openocd

# pyOCD
west flash --runner pyocd
west flash to flash the new board: 
west flash

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Verify Operation

Monitor the serial output to confirm successful boot and inference: Here I already flashed the Silicon Labs EFR32xG24 board, so the output shows no work needed:
Flash the Silicon Labs EFR32xG24

Flash the Silicon Labs EFR32xG24

Verify serial output to confirm successful boot to inference: 
ls /dev/tty.* # Find your device
screen /dev/tty.usbmodem0004402594151 115200
screen

list board to screen

Monitor for successful boot messages:
Serial Output

Serial Output

If everything works, congratulations! Your application has been successfully ported. If not, make sure you have the correct board selected and that your Zephyr environment is properly set up.

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Summary

Porting Zephyr applications between boards is straightforward due to Zephyr’s hardware abstraction. By updating the build target and flashing the new board, you can quickly adapt your Edge Impulse applications to different hardware platforms.

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Next Steps

For more advanced porting, consider:
  • Adjusting pin configurations in prj.conf or boards/<board_name>.dts
  • Modifying peripheral initializations as needed
  • Testing sensor integrations specific to the new hardware
For more examples and tutorials, see the Zephyr series overview for more in-depth tutorials on working with sensors and peripherals in Zephyr projects as we continue to expand this series!