[Solved] Identify the error in this PIR sensor code snippet and choose the fix:import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) PIR_PIN = 18 GPIO.setup(PIR_PIN, GPIO.IN) try: while True: if GPIO.... | Raspberry Pi

Raspberry Pi - gpiozero Library

Identify the error in this PIR sensor code snippet and choose the fix:

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)
PIR_PIN = 18
GPIO.setup(PIR_PIN, GPIO.IN)

try:
    while True:
        if GPIO.input(PIR_PIN):
            print("Motion!")
        time.sleep(1)
except KeyboardInterrupt:
    print("Exit")

AUse GPIO.input() outside the loop

BChange GPIO.setup to GPIO.OUT

CRemove time.sleep(1)

DAdd GPIO.cleanup() in except block

Step-by-Step Solution

Solution:

Step 1: Check for GPIO cleanup after program ends
GPIO pins should be cleaned up to reset their state when the program exits.
Step 2: Add GPIO.cleanup() in the except block
Adding GPIO.cleanup() ensures pins are properly reset on KeyboardInterrupt.
Final Answer:
Add GPIO.cleanup() in except block -> Option D
Quick Check:
Always cleanup GPIO pins on exit [OK]

Quick Trick: Always call GPIO.cleanup() when program ends [OK]

Common Mistakes:

Forgetting GPIO.cleanup() causes warnings on rerun
Setting input pin as output
Removing sleep causes high CPU usage

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More Raspberry Pi Quizzes

Identify the error in this PIR sensor code snippet and choose the fix:

Step 1: Check for GPIO cleanup after program ends

Step 2: Add GPIO.cleanup() in the except block

Final Answer:

Quick Check:

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