Adafruit Clue Board

1

I’m trying to compile for the AdaFruit Clue but Platformio doesn’t seem to be able to find the board. Here’s my env entry:

[env:clue]
platform = nordicnrf52
board = adafruit_cluenrf52840

Error: Unknown board ID ‘adafruit_cluenrf52840’

I’m running PlatformIO, version 4.3.4 and I ran “pio update” and it says that everything (including framework-arduinonordicnrf5) is current.

The board is listed in framework-arduinoadafruitnrf52/boards.txt.

I tried it with and without the “adafruit_” prefix.

Do I need to run something to update the board database?

2

That’s the Arduino board definitions. PlatformIO needs JSON definitions of the boards to work with, as seen in the platform’s board list platform-nordicnrf52/boards at develop · platformio/platform-nordicnrf52 · GitHub. The available values for board = are the file names in there (also cross-reference PlatformIO Registry).

You can open an issue or pull-request at Issues · platformio/platform-nordicnrf52 · GitHub to get the board added by the devs.

You can also directly try this board configruation. Create a new folder boards/ in your project and fill the file boards/adafruit_cluenrf52840.json with this content

{
  "build": {
    "arduino":{
      "ldscript": "nrf52840_s140_v6.ld"
    },
    "core": "nRF5",
    "cpu": "cortex-m4",
    "extra_flags": "-DARDUINO_NRF52840_CLUE -DNRF52840_XXAA -DNRF52840_CLUE",
    "f_cpu": "64000000L",
    "hwids": [
      [
        "0x239A",
        "0x8072"
      ],
      [
        "0x239A",
        "0x0072"
      ],
      [
        "0x239A",
        "0x0071"
      ],
      [
        "0x239A",
        "0x8071"
      ]
    ],
    "usb_product": "CLUE",
    "mcu": "nrf52840",
    "variant": "clue_nrf52840",
    "bsp": {
      "name": "adafruit"
    },
    "softdevice": {
      "sd_flags": "-DS140",
      "sd_name": "s140",
      "sd_version": "6.1.1",
      "sd_fwid": "0x00B6"
    },
    "bootloader": {
      "settings_addr": "0xFF000"
    }
  },
  "connectivity": [
    "bluetooth"
  ],
  "debug": {
    "jlink_device": "nRF52840_xxAA",
    "svd_path": "nrf52840.svd"
  },
  "frameworks": [
    "arduino"
  ],
  "name": "Adafruit CLUE",
  "upload": {
    "maximum_ram_size": 248832,
    "maximum_size": 815104,
    "speed": 115200,
    "protocol": "nrfutil",
    "protocols": [
      "jlink",
      "nrfjprog",
      "nrfutil",
      "stlink"
    ],
    "use_1200bps_touch": true,
    "require_upload_port": true,
    "wait_for_upload_port": true
  },
  "url": "https://www.adafruit.com/product/4500",
  "vendor": "Adafruit"
}

which is pretty much the converted version from Adafruit_nRF52_Arduino/boards.txt at master · adafruit/Adafruit_nRF52_Arduino · GitHub.

Then refer to the board as you already do in the platformio.ini as adafruit_cluenrf52840. Try and get a simple blinky code working. Also, you need to add

framework = arduino

otherwise you won’t compile in Arduino.

3

Thank you so much for the super-speedy and super-helpful response. I added the local board definition and it works perfectly. I’ve submitted a request for official support on the issue tracker but the local board definition allowed me get started on my project right away.

I should have mentioned that I have “framework = arduino” declared globally in a [env] entry in my platformio.ini file so I don’t need it in my [env:clue] entry.

Thanks again!

4

Board was added per https://github.com/platformio/platform-nordicnrf52/commit/4b1ad5a425031f7a97acd3ff88b6e8e3adfa1173 and will be included as adafruit_clue_nrf52840 in the next nRF52 platform release.

5

Wow, that was quick! Thank you so much!