[Solved] What is wrong with this code snippet for detecting a button press on GPIO 12? import RPi.GPIO as GPIO GPIO.... What is wrong with this code snippet for detecting a button press on GPIO 12? | Raspberry Pi

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What is wrong with this code snippet for detecting a button press on GPIO 12? import RPi.GPIO as GPIO GPIO.setmode(GPIO.BCM) GPIO.setup(12, GPIO.OUT, pull_up_down=GPIO.PUD_UP) if GPIO.input(12) == 0: print("Pressed")

APin set as output instead of input

BPull-up resistor cannot be used with GPIO.OUT

CIncorrect comparison value in if statement

DMissing GPIO.cleanup() call

Step-by-Step Solution

Solution:

Step 1: Check GPIO setup mode
Pin 12 is set as output (GPIO.OUT), but button detection requires input mode.
Step 2: Understand pull-up resistor usage
Pull-up resistor applies only to input pins, so setting it with output is incorrect.
Final Answer:
Pin set as output instead of input -> Option A
Quick Check:
Button detection needs GPIO.IN, not GPIO.OUT [OK]

Quick Trick: Use GPIO.IN for button pins, not GPIO.OUT [OK]

Common Mistakes:

Setting output mode for input detection
Using pull-up resistor with output pin
Ignoring cleanup but that is not error here

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What is wrong with this code snippet for detecting a button press on GPIO 12?

Step 1: Check GPIO setup mode

Step 2: Understand pull-up resistor usage

Final Answer:

Quick Check:

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