Tutorial for creating multi cpp file arduino project

FAQ
17

Because it’s not PlatformIO-specific, it’s only related to C++. What PIO / VSCode gives you is a “new file” button and a source folder. I can show you a blink example with multiple files.

src\main.cpp

#include <Arduino.h>
#include "blinky.h"

void setup() {
   blinky_init();
}

void loop() {
  do_blink(500);
}

src\blinky.h

#ifndef BLINKY_H /* include guards */
#define BLINKY_H

/* blinky initialization function */
void blinky_init();

/* blinks the LED once for an length of <ms> milliseconds. */
void do_blink(int ms);

#endif /* BLINKY_H */

src\blinky.cpp

#include "blinky.h"
#include <Arduino.h> /* we need arduino functions to implement this */

void blinky_init() {
   pinMode(LED_BUILTIN, OUTPUT);
}

void do_blink(int ms) {
  digitalWrite(LED_BUILTIN, LOW);
  delay(ms);
  digitalWrite(LED_BUILTIN, HIGH);
  delay(ms);
}
5 Likes