[Solved] Identify the error in this Raspberry Pi button press detection code: import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) GPIO.setup(23, GPIO.IN, pull_up_down=GPIO.PUD_UP) while True: if GPIO.... | Raspberry Pi

Raspberry Pi - LED and Button Projects

Identify the error in this Raspberry Pi button press detection code:

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)
GPIO.setup(23, GPIO.IN, pull_up_down=GPIO.PUD_UP)

while True:
    if GPIO.input(23) == GPIO.HIGH:
        print("Button Pressed")
    time.sleep(0.1)

Atime.sleep(0.1) should be before the if statement.

BThe pull_up_down parameter is missing in GPIO.setup.

CThe code should check for GPIO.LOW to detect button press.

DGPIO.setmode(GPIO.BCM) is incorrect and should be GPIO.BOARD.

Step-by-Step Solution

Solution:

Step 1: Review button wiring and logic
With pull-up resistor, button press pulls pin LOW, not HIGH.
Step 2: Check condition in if statement
Code incorrectly checks for GPIO.HIGH to detect press; should check GPIO.LOW.
Final Answer:
The code should check for GPIO.LOW to detect button press. -> Option C
Quick Check:
Pull-up input reads LOW when pressed, so check GPIO.LOW [OK]

Quick Trick: Pressed button reads LOW on pull-up input pin [OK]

Common Mistakes:

Checking for HIGH instead of LOW on button press
Forgetting pull_up_down parameter
Misplacing sleep causing missed presses

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More Raspberry Pi Quizzes

Identify the error in this Raspberry Pi button press detection code:

Step 1: Review button wiring and logic

Step 2: Check condition in if statement

Final Answer:

Quick Check:

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