## 3.2.2 Swaying Boat

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### 3.2.2.1 Overview

![Img](./media/top1.png)

Here we build a swaying boat with a Micro:bit V2 board, a servo expansion board, a 360° LEGO servo and some LEGO parts. We program to control the boat to perform some movements through the Micro:bit V2 buttons A, B and A+B.

![Img](./media/bottom1.png)

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### 3.2.2.2 Materials Required

![Img](./media/A2-0.png)

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### 3.2.2.3 Installation Steps

![Img](./media/2top.png)

![Img](./media/A2-1.png)

![Img](./media/A2-2.png)

![Img](./media/A2-3.png)

![Img](./media/A2-4.png)

![Img](./media/A2-5.png)

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![Img](./media/A2-8.png)

![Img](./media/A2-9.png)

![Img](./media/A2-10.png)

![Img](./media/A2-11.png)

![Img](./media/A2-12.png)

![Img](./media/A2-13.png)

![Img](./media/A2-14.png)

![Img](./media/A2-15.png)

![Img](./media/A2-16.png)

![Img](./media/A2-17.png)

![Img](./media/A2-18.png)

![Img](./media/A2-19.png)

![Img](./media/A2-20.png)

![Img](./media/A2-21.png)

![Img](./media/A2-22.png)

![Img](./media/A02.png)

![Img](./media/wiring2.jpg)

![Img](./media/A2-23.png)

![Img](./media/A2-24.png)

![Img](./media/A2-25.png)

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![Img](./media/A2-27.png)

![Img](./media/A2-28.png)

![Img](./media/A2-29.png)

![Img](./media/2bottom.png)

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### 3.2.2.4 Test Code

![Img](./media/couj02.png)

⚠️ **<span style="color: rgb(255, 76, 65);">Special reminder: You can obtain the sample code through the following two methods.</span>**

#### **Method 1: drag and drop code blocks to build the sample code**

**1. MakeCode programming environment**

The online version of MakeCode: <u>[MakeCode editor](https://makecode.microbit.org/#editor)</u>

**2. MakeCode extension library**

⚠️ **<span style="color: rgb(255, 76, 65);">Special reminder: </span>** Copy and paste the link: `https://github.com/keyestudio2019/pxt-creative-inventors-kit-master.git` into the search box to import the library.

![Img](./media/Animation-4.gif)

**3. Write the sample code**

![Img](./media/dongtu-02.gif)

#### **Method 2: download the sample code file directly**

**1. Download the code file**

Click to download the code file: <u>[3_3_2_Swaying_Boat](./Codes/3_3_2_Swaying_Boat.hex)</u>

**2. MakeCode programming environment**

The online version of MakeCode: <u>[MakeCode editor](https://makecode.microbit.org/#editor)</u>

**3. Load the sample code**

Drag and drop the sample code to the MakeCode editor.

![Img](./media/Animation-0002.gif)

![Img](./media/line1.png)

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### 3.2.2.5 Test Result

![Img](./media/4top.png)

Wire up and power on through micro USB cable, and connect an external power source (four AAA-1.5V batteries installed in the battery box, ensuring sufficient power).

To download the sample code using an online browser, you need to send the downloaded "**.hex**" file to the Micro:bit V2 board. There are two ways as follows: 

**① Download through WebUSB**

For browsers like **Google Chrome / Microsoft Edge**, you need to click "**Connect Device**" to pair the device first. After that, click "**Download**" to load the sample code to the Micro:bit V2 board.

![Img](./media/Animation-02.gif)

**② Download without WebUSB**

For browsers like **Safari / Firefox / Other**, download and send the sample code to the Micro:bit V2 board.

![Img](./media/Animation-002.gif)

After downloading the sample code, unplug the Micro USB cable to the Micro:bit V2 board.

Turn the DIP switched to the RGB and ON.

![Img](./media/CBA01.png)

Press button A on the Micro:bit V2 board and release it, the swaying boat glides forward, these SK6812 RGB LEDs emit red light, and the 5×5 LED matrix displays ![Img](./media/ab3.png).

Press button B on the Micro:bit V2 board and release it, the swaying boat glides backward, these SK6812 RGB LEDs emit orange light, and the 5×5 LED matrix displays ![Img](./media/ab1.png).

Press button A and B on the Micro:bit V2 board simultaneously and release them, the swaying boat stops, and these SK6812 RGB LEDs and the 5×5 LED matrix turn off.

![Img](./media/dongtu-002.gif)

![Img](./media/4bottom.png)

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