Smart Clothes Drying Rack

Introduction

In this project, we will learn how to make a smart clothes drying rack. Using a micro:bit board, water level sensor, and servo motor connected via a Petal Base Expansion Board, this project achieves the intelligent function of automatically retracting the drying rod in rainy weather and extending it in sunny weather. By making a drying rack that can "sense the weather," you can experience the application of the Internet of Things in daily life.

Teaching Objectives

Understand the role of the water level sensor and learn to detect rainwater.
Master the control method of the servo motor to achieve automatic extension and retraction of the drying rod.
Use graphical programming to implement the logic of "rain triggering the drying rod action."

Teaching Preparations

Before starting the teaching, please ensure you have prepared the following necessary materials:

Name	Quantity	Remarks
Smart Home Explorer Kit	1
micro:bit	1	Prepare separately
PC	1	Prepare separately

These materials will provide you with a complete experience to ensure you can smoothly proceed with subsequent operations and learning. If you have prepared the above, we can continue to the next step.

Course Introduction

What if it suddenly rains while drying clothes? Traditional drying racks need to be retracted manually, and clothes are easily wetted. Today, we will make an automatic drying rack: when the water level sensor detects rain, the servo motor will automatically rotate to retract the drying rod; after the rain stops, the drying rack can automatically extend. No more worrying about forgetting to collect clothes!

Project Production

Hardware Connection

Connect the water level sensor to the J1 interface of the Petal Base Expansion Board.
Connect the Adapter to the J2 interface of the Petal Base Expansion Board.
Connect the servo motor to the S1 interface of the Adapter.