Nordic Semi nRF9160 DK
The Nordic Semiconductor nRF9160 DK is a development board with an nRF9160 SIP incorporating a Cortex M-33 for your application, a full LTE-M/NB-IoT modem with GPS along with 1 MB of flash and 256 KB RAM. It also includes an nRF52840 board controller with Bluetooth Low Energy connectivity. The Development Kit is fully supported by Edge Impulse. You'll be able to sample raw data, build models, and deploy trained machine learning models directly from the studio. As the nRF9160 DK does not have any built-in sensors we recommend you to pair this development board with the X-NUCLEO-IKS02A1 shield (with a MEMS accelerometer and a MEMS microphone). The nRF9160 DK is available for around 150 USD from a variety of distributors including Digikey.
If you don't have the X-NUCLEO-IKS02A1 shield you can use the Data forwarder to capture data from any other sensor, and then follow the Running your impulse locally: On your Zephyr-based Nordic Semiconductor development board tutorial to run your impulse. Or, you can modify the example firmware (based on nRF Connect) to interact with other accelerometers or PDM microphones that are supported by Zephyr.
The Edge Impulse firmware for this development board is open source and hosted on GitHub: edgeimpulse/firmware-nrf-91.
Installing dependencies
To set this device up in Edge Impulse, you will need to install the following software:
On Linux:
GNU Screen: install for example via
sudo apt install screen.
Problems installing the CLI?
See the Installation and troubleshooting guide.
Connecting to Edge Impulse
With all the software in place it's time to connect the development board to Edge Impulse.
1. Plugging in the X-NUCLEO-IKS02A1 MEMS expansion shield
Remove the pin header protectors on the nRF9160 DK and plug the X-NUCLEO-IKS02A1 shield into the development board.
Note: Make sure that the shield does not touch any of the pins in the middle of the development board. This might cause issues when flashing the board or running applications. You can also remove the shield before flashing the board.
2. Connect the development board to your computer
Use a micro-USB cable to connect the development board to your computer. There are two USB ports on the development board, use the one on the short side of the board. Then, set the power switch to 'on'.
3. Update the firmware
The development board does not come with the right firmware yet. To update the firmware:
The development board is mounted as a USB mass-storage device (like a USB flash drive), with the name
JLINK. Make sure you can see this drive.Install the nRF Command Line Tools.
Flash the board controller, you only need to do this once. Go to step 4 if you've performed this step before.
Ensure that the
PROG/DEBUGswitch is innRF52position.Copy
board-controller.binto theJLINKmass storage device.
Flash the application:
Ensure that the
PROG/DEBUGswitch is innRF91position.Run the flash script for your Operating System.
Wait 20 seconds and press the BOOT/RESET button.
4. Setting keys
From a command prompt or terminal, run:
This starts a wizard which asks you to log in and choose an Edge Impulse project. If you want to switch projects run the command with --clean.
The nRF9160 DK exposes multiple UARTs. If prompted, choose the top one:
Alternatively, recent versions of Google Chrome and Microsoft Edge can collect data directly from your development board, without the need for the Edge Impulse CLI. See this blog post for more information.
5. Verifying that the device is connected
That's all! Your device is now connected to Edge Impulse. To verify this, go to your Edge Impulse project, and click Devices. The device will be listed here.
Next steps: building a machine learning model
With everything set up you can now build your first machine learning model with these tutorials:
Looking to connect different sensors? The Data forwarder lets you easily send data from any sensor into Edge Impulse.
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