3. Case 02: Flower-watering Prompter¶
To make a flower-watering prompter with a micro:bit.
3.2. Quick Start¶
Nezha expansion board × 1
micro:bit × 1
LED-red × 1
LED-green × 1
Soil moisture sensor × 1
RJ11 wires × 3
Connect the green LED to J4, red LED to J3 and soil moisture sensor to J2 on the Nezha expansion board as the picture shows.
3.3. MakeCode Programming¶
Click “Advanced” in the MakeCode to see more choices.
For programming, we need to add a package: click “Extensions” at the bottom of the MakeCode drawer and search with “PlanetX” in the dialogue box to download it.
Notice: If you met a tip indicating that some codebases would be deleted due to incompatibility, you may continue as the tips say or create a new project in the menu.
Code as below:¶
You may also download it directly below:---
The red LED lights on for reminding of watering if the soil moisture sensors gets a low value from the earth, or the green LED lights on.