//listing 6.1 Non-Blocking polling example
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"

#define BUTTON_PIN 4  // Button connected to GPIO4

void app_main() {
    gpio_set_direction(BUTTON_PIN, GPIO_MODE_INPUT);
    gpio_set_pull_mode(BUTTON_PIN, GPIO_PULLUP_ONLY); 

    while (1) {
        int pushButtonState = gpio_get_level(BUTTON_PIN);
        printf("Waiting for event...\n");

        if (pushButtonState == 0) {
            printf("Button pressed! Handling event...\n");
        } else {
            printf("Event did not happen\n");
        }

        printf("Doing other tasks...\n");
        vTaskDelay(pdMS_TO_TICKS(500));
    }
}