1.2. Case 01: Password Recognition

Purpose

To make the AI Lens be able to recognize the password on the card.

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Materials Required and Connection Diagram


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

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MakeCode Programming


Step 1

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

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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.

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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:

../../_images/05035_01_06.png

Result

  • Place the cards named 0,4,9 accordingly in the front of the lens, a smile face should display on the micro:bit; or it displays a sad face.