SunFounder Thales Kit, Manual, Page: 55 / 167

SunFounder Thales Kit for Raspberry Pi Pico, Release 1.0
Insert the following statement into the second line of the program:
import utime
Like machine, the
utime
library is introduced here, which handles all time-related things, including the delay we
need to use. Let’s insert a delay sentence between led_onboard.value(1) and led_onboard.value(0) ,
let them be separated by 2 seconds:
utime . sleep( 2 )
Now, the code should look like this. Run it, we will be able to see that the onboard LED turns on first and then turns
off:
import machine
import utime
led_onboard = machine . Pin( 25 , machine . Pin . OUT)
led_onboard . value( 1 )
utime . sleep( 2 )
led_onboard . value( 0 )
Finally, we should make the LED blink. Create a loop, rewrite the program, and it will be what you saw at the
beginning of this chapter.
import machine
import utime
led_onboard = machine . Pin( 25 , machine . Pin . OUT)
while True :
led_onboard . value( 1 )
utime . sleep( 2 )
led_onboard . value( 0 )
utime . sleep( 2 )
What More?
Usually, the library will have a corresponding API (Application Programming Interface) file. This is a concise ref-
erence manual that contains all the information needed to use this library, detailed introduction to functions, classes,
return types, parameters, etc., and even comes with a tutorial.
In this article, we used MicroPython’s
machine
and
utime
libraries, we can find more ways to use them here.
• machine.Pin
• utime
The following is also an example of making the LED blink, please try to read the API file to understand it!
import machine
import utime
led_onboard = machine . Pin( 25 , machine . Pin . OUT)
while True :
led_onboard . toggle()
utime . sleep( 1 )
3.4. Projects 51