HOW to Make an Automatic Fan with KidsIOT

Flow

Assembly

Required Components

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Completed

Wiring Diagram

Test Code

Open KidsBlock and connect the board to computer. Choose File –> Load from your computer.

Choose path D:\Code\2.Code_kidsIOT to open 4.2Trigger mode.sb3.

Click  to connect to port and then .

Q ：After uploading the code, the detected distance is closer than the set value, and the fan starts to work, yet the monitor stops outputting distance values, with a prompt reading:

A ：The power supply may be insufficient, so an external power supply may be required.

Explanations

Code Blocks

Build blocks:

Click  to add libraries DC Motor for esp32 and Ultrasonic.

1. Initialization

   Initialize the serial port first.

   

2. Main Code

   Loop: the ultrasonic sensor reads the distance values and the serial monitor prints them. It determines whether the value is less than 10cm(this threshold can be modified).

   • Distance < 10, fan rotates.

   • Distance > = 10, fan stops.