GPIO cleanup on exit in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the GPIO library.

Raspberry Pi

import [1]

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ARPi.GPIO as GPIO

Bos

Ctime

Dsys

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'time' instead of the GPIO library.

Forgetting to alias the library as GPIO.

The Raspberry Pi GPIO library is imported as RPi.GPIO as GPIO to control the pins easily.

2fill in blank

medium

Complete the code to set the GPIO mode to BCM.

Raspberry Pi

GPIO.setmode([1])

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AGPIO.BOARD

BGPIO.IN

CGPIO.OUT

DGPIO.BCM

Attempts:

3 left

💡 Hint

Common Mistakes

Using GPIO.BOARD instead of GPIO.BCM.

Confusing input/output modes with pin numbering modes.

Setting GPIO mode to GPIO.BCM means you use the Broadcom chip pin numbers.

3fill in blank

hard

Fix the error in the code to clean up GPIO on program exit.

Raspberry Pi

try:
    # Your code here
    pass
finally:
    [1]()

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AGPIO.setup

BGPIO.setmode

CGPIO.cleanup

DGPIO.output

Attempts:

3 left

💡 Hint

Common Mistakes

Calling GPIO.setmode() instead of cleanup.

Forgetting to call cleanup leading to warnings.

The GPIO.cleanup() function resets all GPIO pins used by the program, preventing warnings on next run.

4fill in blank

hard

Fill both blanks to set up a GPIO pin 18 as output and then clean up on exit.

Raspberry Pi

GPIO.setup([1], [2])
try:
    # Use the pin
    pass
finally:
    GPIO.cleanup()

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A18

BGPIO.OUT

CGPIO.IN

D17

Attempts:

3 left

💡 Hint

Common Mistakes

Using pin 17 instead of 18.

Setting pin mode to GPIO.IN instead of GPIO.OUT.

Pin 18 is set as an output pin using GPIO.OUT. Cleanup is called after usage.

5fill in blank

hard

Fill all three blanks to write a high signal to pin 23, then clean up GPIO on exit.

Raspberry Pi

GPIO.setup([1], [2])
GPIO.output([3], GPIO.HIGH)
try:
    pass
finally:
    GPIO.cleanup()

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A23

BGPIO.OUT

D18

Attempts:

3 left

💡 Hint

Common Mistakes

Using pin 18 instead of 23.

Forgetting to set pin mode before output.

Pin 23 is set as output, then set to HIGH signal. Cleanup resets pins on exit.