Raspberry Pi - gpiozero Library
You want to blink an LED connected to GPIO 22 every second using gpiozero. Which code correctly achieves this?
You want to blink an LED connected to GPIO 22 every second using gpiozero. Which code correctly achieves this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand blinking methods
gpiozero's LED class has a blink() method with on_time and off_time parameters.Step 2: Analyze options
from gpiozero import LED led = LED(22) while True: led.on() sleep(1) led.off() sleep(1) uses manual loop but lacks import for sleep, causing NameError. from gpiozero import LED led = LED(22) led.blink(1) calls blink with one argument (sets off_time=0.5s mismatch). from gpiozero import LED led = LED(22) led.blink(on_time=1, off_time=1) correctly uses blink(on_time=1, off_time=1). from gpiozero import LED led = LED(22) led.blink(1, 1, n=0) sets n=0 causing no continuous blinking.Final Answer:
from gpiozero import LED led = LED(22) led.blink(on_time=1, off_time=1) -> Option BQuick Check:
Use blink(on_time, off_time) = D [OK]
Quick Trick: Use led.blink(on_time=1, off_time=1) to blink LED [OK]
Common Mistakes:
- Using manual loops instead of blink()
- Passing wrong number of arguments to blink()
- Adding invalid extra arguments
Master "gpiozero Library" in Raspberry Pi
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