Keyestudio ESP32 - 3. Test Code

To Next Page

To Previous Page

ESP32 Starter Kit

3. Test Code

We simply stimulate the traﬃc lights: green LED lights up for 5s, yellow LED blinks for 3 times, and red LED lights

up for 5s. And we set this to loop.

The blinking of yellow LED can utilize for()statement we have mentioned in project 3. Thus, we only need to set the

lighting time to complete a traﬃc light.

1. Drag the two code blocks.

2. Set the pin mode to “output”

3. Drag the following blocks from “LED” part and set the IO27 pin to HIGH and then LOW. Then set the delay

time to 5s.

4. Drag the following blocks from “Control” part and set the repeat time to 3, then set the IO26 pin to HIGH and

then LOW. Then set the delay time to 0.5s.

182 Chapter 9. Scratch Tutorial