Access Denied! A Door Entry Tutorial

Enhancing door security with micro:bit. This tutorial was written by Sean Lew, from the Singapore University of Technology and Design, during his summer internship with us in 2018.


  • Build your own wireless door security!

  • Setting up alerts for any intruders or unlocked doors!


  • 2 x Microbit

  • 1 x Breakout Board

  • 1 x Crash Sensor

  • 1 x Buzzer

Step 1 – Setting Up!

  • Slot one of the micro:bit into the breakout board.
  • Connect the Buzzer to Pin 0 of the breakout board and the crash sensor to Pin 1.
  • Before moving on to Step 2, make sure you download the “tinkercademy-tinker-kit” package.

Step 2 – Code away!

  • Drag these set of codes into your makecode platform and download it into the micro:bit connected to your breakout board.
  • Give the crash sensor a few press to see if your code is working correctly!

Step 3 – Almost there!

  • Download this set of codes for the second micro:bit (receiver).
  • Now give test out the crash sensor to see if the receiving micro:bit is working correctly!
  • Now that you have set up your very first wireless door security, you can try it with more than just 1 door!
  • Feel free to also add add other form of alerts on the receiving micro:bit to enhance your own security.