Guides for product: Circuit Playground Bluefruit - ALPHA - Bluetooth Low Energy

Circuit Playground Bluefruit is our third board in the Circuit Playground series, another step towards a perfect introduction to electronics and programming. We've taken the popular Circuit Playground Express and made it even better! Now the main chip is an nRF52840 microcontroller which is not only more powerful, but also comes with Bluetooth Low Energy support for wireless connectivity.

This product is ALPHA hardware at this time, for use by folks who are going to be developing software to support it - it's not quite ready for student/beginner use!

    The board is round and has alligator-clip pads around it so you don't have to solder or sew to make it work. You can power it from USB, a AAA battery pack, or with a Lipoly battery (for advanced users). Circuit Playground Bluefruit has built-in USB support. Built in USB means you plug it in to program it and it just shows up, no special cable or adapter required. Just program your code into the board then take it on the go!

    Here's some of the great goodies baked in to each Circuit Playground Bluefruit:

    • 1 x nRF52840 Cortex M4 processor with Bluetooth Low Energy support
    • 10 x mini NeoPixels, each one can display any color
    • 1 x Motion sensor (LIS3DH triple-axis accelerometer with tap detection, free-fall detection)
    • 1 x Temperature sensor (thermistor)
    • 1 x Light sensor (phototransistor). Can also act as a color sensor and pulse sensor.
    • 1 x Sound sensor (MEMS microphone)
    • 1 x Mini speaker with class D amplifier (7.5mm magnetic speaker/buzzer)
    • 2 x Push buttons, labeled A and B
    • 1 x Slide switch
    • 8 x alligator-clip friendly input/output pins
    • Includes I2C, UART, 6 pins that can do analog inputs, multiple PWM outputs
    • Green "ON" LED so you know its powered
    • Red "#13" LED for basic blinking
    • Reset button
    • 2 MB of SPI Flash storage, used primarily with CircuitPython to store code and libraries.
    • MicroUSB port for programming and debugging
    • USB port can act like serial port, keyboard, mouse, joystick or MIDI!

    Learn how to use your iOS or Android device to control and communicate with Bluefruit LE.
    Bluefruit LE Connect for iOS and Android
    Circuit Playground Bluefruit: Everything amazing about Circuit Playground, now with the power of Bluetooth!
    Adafruit Circuit Playground Bluefruit
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    Bluetooth Controlled Light Up Cauldron
    Circuit Playground Bluetooth Cauldron
    Mix NeoPixels wirelessly with a Bluetooth LE remote control!
    Color Remote with Circuit Playground Bluefruit
    Turn musical notes into a pretty NeoPixel light show.
    Circuit Playground-O-Phonor
    Now you can beam images THROUGH THIN AIR from your mobile device to your Circuit Playground Bluefruit!
    Wireless Image Transfer with Circuit Playground Bluefruit and TFT Gizmo
    Bluetooth Controlled Lights and Sounds
    Circuit Playground Bluefruit Pumpkin with Lights and Sounds
    Create a digital snow globe using a Circuit Playground Bluefruit and a TFT Gizmo, all coded in CircuitPython.
    Circuit Playground TFT Gizmo Snow Globe
    Learn to create your own graphics programs with Turtle Graphics on the Circuit Playground Bluefruit
    Turtle Graphics in CircuitPython on TFT Gizmo
    Formal fashion electrified – now with Bluetooth LE.
    No-Solder LED Disco Tie with Bluetooth
    Build your own Bluetooth controlled turtle rover!
    Bluetooth Turtle Bot with CircuitPython and Crickit