Circuit Playground Bluefruit

Hardware

Platform Nordic nRF52: The nRF52 Series are built for speed to carry out increasingly complex tasks in the shortest possible time and return to sleep, conserving precious battery power. They have a Cortex-M4F processor and are the most capable Bluetooth Smart SoCs on the market.

Microcontroller NRF52840
Frequency 64MHz
Flash 796KB
RAM 243KB
Vendor Adafruit

Configuration

Please use adafruit_cplaynrf52840 ID for board option in “platformio.ini” (Project Configuration File):

[env:adafruit_cplaynrf52840]
platform = nordicnrf52
board = adafruit_cplaynrf52840

You can override default Circuit Playground Bluefruit settings per build environment using board_*** option, where *** is a JSON object path from board manifest adafruit_cplaynrf52840.json. For example, board_build.mcu, board_build.f_cpu, etc.

[env:adafruit_cplaynrf52840]
platform = nordicnrf52
board = adafruit_cplaynrf52840

; change microcontroller
board_build.mcu = nrf52840

; change MCU frequency
board_build.f_cpu = 64000000L

Uploading

Circuit Playground Bluefruit supports the next uploading protocols:

  • jlink
  • nrfjprog
  • nrfutil

Default protocol is nrfutil

You can change upload protocol using upload_protocol option:

[env:adafruit_cplaynrf52840]
platform = nordicnrf52
board = adafruit_cplaynrf52840

upload_protocol = nrfutil

Debugging

PIO Unified Debugger - “1-click” solution for debugging with a zero configuration.

Warning

You will need to install debug tool drivers depending on your system. Please click on compatible debug tool below for the further instructions and configuration information.

You can switch between debugging Tools & Debug Probes using debug_tool option in “platformio.ini” (Project Configuration File).

Circuit Playground Bluefruit does not have on-board debug probe and IS NOT READY for debugging. You will need to use/buy one of external probe listed below.

Compatible Tools On-board Default
J-LINK   Yes

Frameworks

Name Description
Arduino Arduino Wiring-based Framework allows writing cross-platform software to control devices attached to a wide range of Arduino boards to create all kinds of creative coding, interactive objects, spaces or physical experiences.