Lesson 4: Hello ESP32

Today your C++ code moves from the laptop to a real microcontroller.

Keep this first hardware lesson safe: USB only, no motors, no extra wiring.

setup runs once. loop repeats again and again.

Choose the ESP32 board and the port connected to your board.

The Serial Monitor lets the board talk back to you.

Change the messages, upload again, and explain what runs once and what repeats.