Arduino Internals Access

: The avr-g++ (or equivalent for ARM/ESP32) compiler converts the C++ code into object files.

int main(void) { init(); // Hardware initialization (timers, PWM) setup(); // User-defined setup for (;;) { loop(); // User-defined loop running forever } } Use code with caution. Arduino Internals

How to properly include functions written on other sketch tabs : The avr-g++ (or equivalent for ARM/ESP32) compiler

: These files are linked with the Arduino Core (pre-compiled code for the specific board) to create a single .hex or .bin file. When you click "Upload," the Arduino IDE performs

When you click "Upload," the Arduino IDE performs several background tasks:

Contrary to popular belief, Arduino does not have its own language. It uses with a specific set of libraries and a pre-processing step.

: Every C++ program needs a main() function. In Arduino, this is hidden in the core files (e.g., main.cpp ). It typically looks like this: