micro:IO Extender - a micro:bit IO Expansion Board with Rich Ports

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A simple IO extension board for micro:bit. This board leads out all IO ports of micro:bit that are in accordance with Gravity standard interface. Meanwhile, it has an independent I2C and Serial port. The board also integrates the frequently-used buzzer and edge connector contacts. The silkscreens on the back clearly indicate the functions of all interfaces, which can help users to get started easily.



  • Gravity 3-Pin interface, plug and play, support DFRobot Gravity series
  • Lead-out all micro:bit pins in the form of 3P pin header, 19 pins in total. 
  • Independent I2C and 1-way serial port.
  • Onboard buzzer and buzzer switch
  • Onboard edge connector contacts
  • Clear silkscreen, ENIG technology and high quality


  • Operating Voltage: 3.3V
  • Dimension: 45.5*66.5mm/1.79*2.62”
  • Interface: IO port ×19



Shipping List
  • 1x micro:IO Extender expansion board

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