Sony's Spresense is a small, but powerful development board with a 6 core Cortex-M4F microcontroller and integrated GPS, and a wide variety of add-on modules including an extension board with headphone jack, SD card slot and microphone pins, a camera board, a sensor board with accelerometer, pressure, and geomagnetism sensors, and Wi-Fi board - and it's 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.
To get started with the Sony Spresense and Edge Impulse you'll need:
The Spresense product family.
To set this device up in Edge Impulse, you will need to install the following software:
With all the software in place it's time to connect the development board to Edge Impulse.
Spresense main board with attached camera, sensor add-on, Wi-Fi add-on, and extension board.
An SD card is necessary to use the Spresense. Make sure it is formatted in FAT format before inserting it into the Spresense.
Use a micro-USB cable to connect the main development board (not the extension board) to your computer.
The development board does not come with the right firmware yet. To update the firmware:
- 3.Open the flash script for your operating system (
flash_linux.sh) to flash the firmware.
- 4.Wait until flashing is complete. The on-board LEDs should stop blinking to indicate that the new firmware is running.
From a command prompt or terminal, run:
Mac: Device choice
If you have a choice of serial ports and are not sure which one to use, pick /dev/tty.SLAB_USBtoUART or /dev/cu.usbserial-*
This will start a wizard which will ask you to log in and choose an Edge Impulse project. If you want to switch projects run the command with
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.
Device connected to Edge Impulse.
Edge Impulse has partnered with SensiEdge to add support for sensor fusion applications to the Sony Spresense by integrating the SensiEDGE CommonSense sensor extension board. The CommonSense comes with a wide array of sensor functionalities that connect seamlessly to the Spresense and the Edge Impulse studio. In addition to the Sony Spresense, the Spresense extension board and a micro-SD card, you will need the CommonSense board which is available to purchase on Mouser.
SensiEDGE CommonSense sensor board.
Connect the Sony Spresense extension board to the Sony Spresense ensuring that the micro-SD card is loaded. Connect the SensiEDGE CommonSense in the orientation shown below - with the connection ports facing the same direction. The HD camera is optional but can be attached if you want to create an image based application.
Connect the CommonSense to Sony Spresense.
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
If prompted to select a device, choose
? Which device do you want to connect to?
❯ /dev/tty.usbmodem** (commonsense)
Verify that the device is connected by going to the Devices tab in your project and checking for the green light as mentioned in the steps above.
Once your device is connected, you are now ready to collect data directly from your CommonSense board and start creating your machine learning application.
With everything set up you can now build your first machine learning model with these tutorials:
If you see:
ValueError: dlsym(RTLD_DEFAULT, kIOMasterPortDefault): symbol not found
pip3 install --upgrade pyserial
edge-impulse-run-impulsecommands do not start it might be because of an error interacting with the SD card or because your board has an old version of the bootloader. To see the debug logs, run:
And press the RESET button on the board. If you see
Welcome to nashyou'll need to update the bootloader. To do so:
- 1.Install and launch the Arduino IDE.
- 2.Go to Preferences and under 'Additional Boards Manager URLs' add
https://github.com/sonydevworld/spresense-arduino-compatible/releases/download/generic/package_spresense_index.json(if there's already text in this text box, add a
,before adding the new URL).
- 3.Then go to Tools > Boards > Board manager, search for 'Spresense' and click Install.
- 4.Select the right board via: Tools > Boards > Spresense boards > Spresense.
- 5.Select your serial port via: Tools > Port and selecting the serial port for the Spresense board.
- 6.Select the Spresense programmer via: Tools > Programmer > Spresense firmware updater.
- 7.Update the bootloader via Tools > Burn bootloader.