Raspberry Pi - GPIO Basics with Python
Which of the following is the correct way to read the state of GPIO pin 18 as an input?
Which of the following is the correct way to read the state of GPIO pin 18 as an input?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify the function to read input
GPIO.input(pin) reads the current state of the specified pin.Step 2: Check other options
GPIO.output sets pin output, GPIO.setup configures pin mode, GPIO.read does not exist.Final Answer:
GPIO.input(18) -> Option CQuick Check:
Read input with GPIO.input(pin) [OK]
Quick Trick: Use GPIO.input(pin) to read input pin state [OK]
Common Mistakes:
- Using GPIO.output to read input
- Confusing setup with reading
- Using non-existent GPIO.read function
- Not specifying pin number
Master "GPIO Basics with Python" in Raspberry Pi
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