1.5. Case 03: Color-controlled Piano


To make the Nezha expansion board be able to play the different sounds according to the recognized color from the AI Lens.


Materials Required and Connection Diagram

  • Connect the AI Lens to the IIC port on the Nezha expansion board as the picture shows.


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 “PlanetX” in the dialogue box to download it.


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

Step 2

Code as below:



  • The buzzer on the Nezha expansion board plays different sounds aoccording to the different color recoginzed by the AI Lens.