# 5. Assembly

## 5.1 Servo Initial Position Adjustment Instruction

:::Note}
Before installing the servo horn, you must first download the servo initial position program, power on the servo, and set the servo to return to its initial position. Then, install the servo horn. Failure to follow the steps above may affect the performance of functions such as door control and clothes-drying rack operations.
:::

### 5.1.1 Program Download

[Source Code](../_static/source_code/servo_lnitial_position_adjustment_program.zip)

(1) Connect the **micro:bit** controller to your computer using a USB data cable. A **"MICROBIT"** disk will appear on your computer.

<img src="../_static/media/chapter_5/section_1/media/image2.png" class="common_img" />

(2) Drag and drop the **"Servo Initial Position Adjustment Program"** into the **micro:bit** disk, which is located in the same directory as this document.

<img src="../_static/media/chapter_5/section_1/media/image3.png" class="common_img" />

### 5.1.2 Servo Wiring

Connect the door control servo to port 1 and the clothes-drying rack servo to port 4. Then, connect the battery box. Make sure the servo wiring exactly matches the diagram below.

### 5.1.3 Power On

Switch the battery box and the expansion board to the **"ON"** position.

## 5.2 Assembly Instruction

<p class="step">Assembly Instruction</p>

<img src="../_static/media/chapter_5/section_2/media/1.png" class="common_img" />

<p class="step">Step1:Build up base(1)</p>

<img src="../_static/media/chapter_5/section_2/media/2.png" class="common_img" />

<p class="step">Step2:Build up base(2)</p>

<img src="../_static/media/chapter_5/section_2/media/3.png" class="common_img" />

<p class="step">Step3:Install servo bracket</p>

<img src="../_static/media/chapter_5/section_2/media/4.png" class="common_img" />

<p class="step">Step4:Install Servo</p>

<img src="../_static/media/chapter_5/section_2/media/5.png" class="common_img" />

<p class="step">Step5:Install Servo Horn</p>

<img src="../_static/media/chapter_5/section_2/media/6.png" class="common_img" />

<img src="../_static/media/chapter_5/section_2/media/7.png" class="common_img" />

<p class="step">Step6:Reserve module wire in the base</p>

<img src="../_static/media/chapter_5/section_2/media/8.png" class="common_img" />

<p class="step">Step7:Install Base(3)</p>

<img src="../_static/media/chapter_5/section_2/media/9.png" class="common_img" />

<p class="step">Step8:Install door and ultrasonic sensor</p>

<img src="../_static/media/chapter_5/section_2/media/10.png" class="common_img" />

<p class="step">Step9:Install WiFi module</p>

<img src="../_static/media/chapter_5/section_2/media/11.png" class="common_img" />

<p class="step">Step10:Fix the house on the base(1)</p>

<img src="../_static/media/chapter_5/section_2/media/12.png" class="common_img" />

<p class="step">Step11:Wire ultrasonic sensor and WiFi module</p>

<img src="../_static/media/chapter_5/section_2/media/13.png" class="common_img" />

<p class="step">Step12:Fix the house on the base(2)</p>

<img src="../_static/media/chapter_5/section_2/media/14.png" class="common_img" />

<p class="step">Step13:Lead out wires of I2C & ADC expansion modules</p>

<img src="../_static/media/chapter_5/section_2/media/15.png" class="common_img" />

<p class="step">Step14:Install micro:bit expansion board</p>

<img src="../_static/media/chapter_5/section_2/media/16.png" class="common_img" />

<p class="step">Step15:Connect servo and I2C expansion module to micro:bit expansion board</p>

<img src="../_static/media/chapter_5/section_2/media/17.png" class="common_img" />

<p class="step">Step16:Connect ADC module to micro:bit expansion board    </p>

<img src="../_static/media/chapter_5/section_2/media/18.png" class="common_img" />

<p class="step">Step17:Diagram of the completed wiring</p>

<img src="../_static/media/chapter_5/section_2/media/19.png" class="common_img" />

<p class="step">Step18:Fix the house on the base(3)</p>

<img src="../_static/media/chapter_5/section_2/media/20.png" class="common_img" />

<p class="step">Step19:Install the roof</p>

<img src="../_static/media/chapter_5/section_2/media/21.png" class="common_img" />

<p class="step">Step20:Install the roof</p>

<img src="../_static/media/chapter_5/section_2/media/22.png" class="common_img" />

<p class="step">Step21:Wire fan module</p>

<img src="../_static/media/chapter_5/section_2/media/23.png" class="common_img" />

<p class="step">Step22:Install fan module on the roof</p>

<img src="../_static/media/chapter_5/section_2/media/24.png" class="common_img" />

<p class="step">Step23:Install raindrop, temperature and humidity, and light sensors</p>

<img src="../_static/media/chapter_5/section_2/media/25.png" class="common_img" />

<p class="step">Step24:Install raindrop, temperature and humidity, and light sensors</p>

<img src="../_static/media/chapter_5/section_2/media/26.png" class="common_img" />

<p class="step">Step25:Install micro:bit cover</p>

<img src="../_static/media/chapter_5/section_2/media/27.png" class="common_img" />

<p class="step">Step26:Install soil humidity sensor and water pump</p>

<img src="../_static/media/chapter_5/section_2/media/28.png" class="common_img" />

<img src="../_static/media/chapter_5/section_2/media/29.png" class="common_img" />

<p class="step">Step27:Wire soil humidity senor</p>

<img src="../_static/media/chapter_5/section_2/media/30.png" class="common_img" />

<p class="step">Step28:Wire soil humidity senor</p>

<img src="../_static/media/chapter_5/section_2/media/31.png" class="common_img" />

<p class="step">Step29:Install and wire RGB module</p>

<img src="../_static/media/chapter_5/section_2/media/32.png" class="common_img" />

<p class="step">Step30:Install fence</p>

<img src="../_static/media/chapter_5/section_2/media/33.png" class="common_img" />

<p class="step">Step31:Install suction pipe</p>

<img src="../_static/media/chapter_5/section_2/media/34.png" class="common_img" />

<p class="step">Step32:Overall wiring diagram
</p>

<img src="../_static/media/chapter_5/section_2/media/35.png" class="common_img" />

<p class="step">Step33:Final Effect Diagram
</p>

<img src="../_static/media/chapter_5/section_2/media/36.png" class="common_img" />