Example Code for micro:bit-Read Key Value (Math mode)
Last revision 2025/12/31
The article provides detailed instructions on using the micro:bit to read key values in Math mode, utilizing Makecode graphical programming and Mind+ platform. It includes hardware and software preparation, library installation, and sample code for key value reading, emphasizing the integration of touch keys on the automatic expansion board.
Hardware Preparation
- Math & Automatic expansion board for micro:bit, Quantity: 1
- micro:bit, Quantity: 1
Software Preparation
Makecode graphical programming, Mind+ platform.
Makecode Library Address.
About how to install a software library?
Wiring Diagram
No specific wiring required (touch keys are integrated on the board).
Other Preparation Work
Install the Makecode library from https://github.com/DFRobot/pxt-Math-Automatic.
About how to install a software library?
Sample Code
Read Key Value (Math mode)
Example Code in Math mode: calculator
Key Value in math mode:
| Key Label | Value (numerical) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| Key Label | Vlaue (char) |
|---|---|
| + | + |
| - | - |
| × | × |
| ÷ | ÷ |
| = | = |
| DFlogo | DF |
Result
When press down key 2, you get a number "2", then press down key 3, you get a number "23".
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