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AdapterBits

A collection of adapter boards that supports connecting non-micro:bit boards to micro:bit accessorise.

  • PicoBit - for the Raspberry Pi Pico
  • NanoBit - for the Arduino Nano Connect RP2040

The PicoBit is available to purchase on Tindie.

The NanoBit is available to purchase on Tindie.

PicoBit

The PicoBit adapter board for the Raspberry Pi Pico allows you to connect a Pi Pico to micro:bit accessories. It's also possible to connect the Pico to Raspberry Pi HAT via a micro:bit to Pi adapters.

drawing

Features

  • All micro:bit pins broken out to 2 rows of headers

  • Each pin out has a solder jumper

  • 2x GND

  • 2x VCC

  • Thru-holes for i2c pullup resistors (optional)

  • Thru-holes for back powering prevention diode (optional)

Pin Mapping

The default wired pin mapping from Micro:bit edge connector pin to Pi Pico GPIO is:

  • P0 = GPIO26
  • P1 = GPIO27
  • P2 = GPIO28
  • P3 = GPIO7
  • P4 = GPIO8
  • P5 = GPIO22
  • P6 = GPIO9
  • P7 = GPIO10
  • P8 = GPIO11
  • P9 = GPIO12
  • P10 = GPIO13
  • P11 = GPIO17
  • P12 = GPIO14 (SPI0 RX)
  • P13 = GPIO18 (SPI0 TX)
  • P14 = GPIO16
  • P15 = GPIO19
  • P16 = GPIO15
  • P19 = GPIO21 (I2C0)
  • P20 = GPIO20 (I2C0)

The mapping can be changed by cutting solder bridges on the underside of the board and adding patch wires to the top or bottom, optionally using additional female headers.

The underside of the PicoBit:

drawing

Examples

Circuit Python

These examples are for the PicoBit and the Nanobit.

There is a dedicated README for the CircuitPython examples.

Note that there is a Micro:bit Compatibility API, these examples demonstrate the:

  • Kitronik GameZip (Pong)
  • Kitronik Klef
  • ProtoPic Simon Says
  • ProtoPic MicroPixel Edge

PicoBit Arduino Examples

Installation

Copy the arduino/Picobit folder to [ARDUINO_SKETCHES]/libraries/

Start (or restart) the Arduino IDE.

In the Arduino IDE goto:
File -> Examples -> "Examples from Custom Libraries -> PicoBit"

And select an example.

PicoBit C Examples

Ensure you have setup the Raspberry Pi Pico SDK first.

The examples assume the SDK has been installed into: ~/pico/pico-sdk

SPI Display (ST7735) - PIO

This example is based on code from [REF] and displays colour bars. The SPI communication is performed via PIO.

export PICO_SDK_PATH=~/pico/pico-sdk
cd c/examples/spi_display
mkdir build
cd build
cmake ..
make -j
cp spi_display.uf2 /Volumes/RPI-RP2/