28. Case 27: The Distance Indicator

28.1. Introduction

To make a device that is able to display the distance from the sonar:bit to the object.


28.2. Quick Start

Materials Required

Nezha expansion board × 1

micro:bit V2 × 1

sonar sensor × 1

Bricks × n

Bricks Required


Connection Diagram

  • Inset the micro:bit, and connect the sonar:bit to J1 port on Nezha expansion board.


Bricks Build-up

  • Build a device as the pictures indicate:



Video link: https://youtu.be/0HgP_YVgNJU

28.3. MakeCode Programming

Step 1

Click “Advanced” in the MakeCode drawer to see more choices.


We need to add a package for programming. Click “Extensions” in the bottom of the drawer and search with “nezha” to download it.


Note: If you met a tip indicating the codebase might be deleted due to incompatibility, you may continue as the tips say or create a new project in the menu.

Step 2

Programme as the pictures indicate



Link: https://makecode.microbit.org/_Vb69KzLR3Dhe

You may download it directly below:



  • After powering on, the detected distance displays on the micro:bit.