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Why is it important to set the correct GPIO pin numbering mode (BCM or BOARD) before configuring pins in Raspberry Pi?

hard📝 Conceptual Q10 of 15
Raspberry Pi - GPIO Basics with Python
Why is it important to set the correct GPIO pin numbering mode (BCM or BOARD) before configuring pins in Raspberry Pi?
ABecause BOARD mode is faster than BCM mode
BBecause BCM mode disables unused pins automatically
CBecause pin numbers differ between modes and wrong mode causes incorrect pin control
DBecause GPIO pins only work in BCM mode
Step-by-Step Solution
Solution:

  1. Step 1: Understand difference in numbering schemes

    BCM and BOARD modes use different numbering systems for the same physical pins.

  2. Step 2: Consequence of wrong mode

    Using wrong mode causes code to control wrong pins, leading to hardware errors.

  3. Final Answer:

    Because pin numbers differ between modes and wrong mode causes incorrect pin control -> Option C

  4. Quick Check:

    Correct mode ensures correct pin mapping [OK]
Quick Trick: Set mode first to match pin numbering scheme [OK]
Common Mistakes:
  • Assuming modes are interchangeable
  • Thinking one mode is always better

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