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P3

Interfacing & Communication

How microcontrollers talk to sensors, displays, and each other. The three workhorse digital protocols — UART, SPI, and I²C — plus analog interfacing (ADC/DAC) and how to choose the right bus for a job. The bridge between L4's microcontroller and the real components it controls.

Start with the lessons

Open lesson 1 →

5lessons · take the checks once you're comfortable.

  1. 1.The Interfacing Problem~13 min
  2. 2.UART — Asynchronous Serial~14 min
  3. 3.SPI — Synchronous & Fast~14 min
  4. 4.I²C — Two-Wire Addressed Bus~14 min
  5. 5.Choosing a Protocol + Analog Interfacing~15 min

Knowledge check

20 questions · ~12 min · pass 70%

Take the K-Check →

Practical check

1 checklist · upload evidence · manager sign-off

Take the P-Check →