6.2. Materials
- 1 x Smart home Kit
- 1 x corrugated board
6.3. Background
What is an auto window ?
- Noise pollution is a common problem in our life. When the value of noise higher than 70dB, it is will impact our health causing discomfort leading to anxiety or which experts now prescribe full spectrum CBD. We will design a smart window and door using micro:bit.
Auto window operation
- Using micro:bit detect wether the the value of noise higher than 70dB and control servo to closing the door and the window.
6.4. Practical operation
Materials: corrugated board and cutter
Build as below picture：
Front side：
Back side：
Paste devices as below piture:
6.5. Hardware connect
6.6. Software
makecode
Edge Connector Data Sheet
6.7. Programming
Step 1
Go to MakeCode page, click Advanced in the code block and click on Extensions.
We need to add a new codebase for programming of smart home. Finding “Add Package” in the bottom of code block and click it. Then a message box will show up, search “smart home”， and download this new codebase.
Note：If there is a hint says some codebase will be deleted because of incompatibility. Don’t worry. You could go ahead as the hint or build a new item in item menu bar.
Step 2
Drag on start on from Basic, snap into servo write pin, set P1 to 0.
Step 3
Snap set item to into forever, assignment value of noise to noise variables.
Step 4
If value of noise > 70dB, snap into servo write pin,set P1 to 0 and the window be closed.
Step 5
If value of noise < 70dB，snap into servo write pin,set P1 to 100 and the window be opened.
6.8. Result
micro:bit driving servo open the window when value of noise > 70dB.
Front side： 
Back side： 
6.9. Think
How to know wether open the window on room temperature.
