Flow

Assembly

Required:

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Step 8

Step 9

Completed!

Wiring Diagram

Test Code

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

Choose D:\Code\2.Code_kidsIOT to open 4.2Automatic_lighting.sb3

Click  to connect to the port and then .

Explanation

Code Blocks

Conceive:

1. Initialization

   Set the pins of white LED module and the photoresistor; Initialize the serial monitor.

   

2. Main Code

   Loop:

   ① Print the value read by the photoresistor.

   ② Determine whether the photoresistor value is less than 1000 every 0.1s.

   • value < 1000 (weak light): LED lights up.

   • value ≥ 1000 (adequate light): LED goes off.