Why the Calliope mini instead of the BBC Micro:bit?

The Calliope mini has a number of parts the Micro:bit does not have directly built on to the board.

Here are the following unique parts of the Calliope mini:

  • Instead edge-connect pads on the bottom of the board, like micro:bit, Calliope Mini's has a circular star design, with alligator pads on 6 corners for easy connection.
  • Full 9 degree of freedom IMU with Accelerometer, Gyroscope, Magnetometer (Bosch BMX055) - the micro:bit has only accelerometer and magnetometer, and they are different/separate chips.
  • MEMS Microphone for audio input
  • DC Motor Driver (TI DRV8837) to drive a single DC motor or solenoid
  • Piezo Speaker
  • RGB LED (WS2812B NeoPixel)
  • 2 x Grove connectors (I2C + serial / analog)