Raspberry Pi - LED and Button Projects
Identify the error in this code snippet for detecting a button press on GPIO 5:
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(5, GPIO.IN)
if GPIO.input(5) == True:
print("Button Pressed")
Identify the error in this code snippet for detecting a button press on GPIO 5: import RPi.GPIO as GPIO GPIO.setmode(GPIO.BCM) GPIO.setup(5, GPIO.IN) if GPIO.input(5) == True: print("Button Pressed")
medium📝 Debug Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Check GPIO setup
Pin is set as input but no pull-up or pull-down resistor specified.Step 2: Understand effect of missing resistor
Without resistor, pin state is undefined (floating), causing unreliable detection.Final Answer:
Missing pull-up or pull-down resistor setup -> Option CQuick Check:
Input pin needs pull resistor to avoid floating [OK]
Quick Trick: Always set pull-up/down resistor for input pins [OK]
Common Mistakes:
- Ignoring pull resistor causes unstable readings
- Thinking GPIO mode is wrong
- Assuming syntax error in correct if statement
Master "LED and Button Projects" in Raspberry Pi
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