PlatformIO ESP32 with ESP-IDF minimal C++ example

By default, when you initialize a PlatformIO ESP-IDF project, it will generate main.c - not a C++ but a pure C file

This minimal example instead uses main.cpp (you can just rename your main.c - see How to use C++ main.cpp with PlatformIO on ESP32 / esp-idf for a detailed list of steps to do).

#include <cstdio>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>

extern "C" {
    void app_main(void);

void app_main() {
    while(true) {
        printf("Hello PlatformIO!\n");
        // Wait for one second
        vTaskDelay(1000 / portTICK_PERIOD_MS);