FridgeSensor/main/main.c

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "led_strip.h"
#include "sdkconfig.h"

static const char *TAG = "example";

/* Use project configuration menu (idf.py menuconfig) to choose the GPIO to blink,
   or you can edit the following line and set a number here.
*/
#define BLINK_GPIO CONFIG_BLINK_GPIO
#define PHOTO_SENSOR_PIN GPIO_NUM_18

static uint8_t s_led_state = 0;

#ifdef CONFIG_BLINK_LED_RMT
static led_strip_t *pStrip_a;

static void blink_led(void)
{
    /* If the addressable LED is enabled */
    if (s_led_state) {
        /* Set the LED pixel using RGB from 0 (0%) to 255 (100%) for each color */
        pStrip_a->set_pixel(pStrip_a, 0, 16, 16, 16);
        /* Refresh the strip to send data */
        pStrip_a->refresh(pStrip_a, 100);
    } else {
        /* Set all LED off to clear all pixels */
        pStrip_a->clear(pStrip_a, 50);
    }
}

static void configure_led(void)
{
    ESP_LOGI(TAG, "Example configured to blink addressable LED!");
    /* LED strip initialization with the GPIO and pixels number*/
    pStrip_a = led_strip_init(CONFIG_BLINK_LED_RMT_CHANNEL, BLINK_GPIO, 1);
    /* Set all LED off to clear all pixels */
    pStrip_a->clear(pStrip_a, 50);
}

#elif CONFIG_BLINK_LED_GPIO

/*static void blink_led(void)
{
    // Set the GPIO level according to the state (LOW or HIGH)
    gpio_set_level(BLINK_GPIO, s_led_state);
}*/

static void configure_led(void)
{
    ESP_LOGI(TAG, "Example configured to blink GPIO LED!");
    gpio_reset_pin(BLINK_GPIO);
    /* Set the GPIO as a push/pull output */
    gpio_set_direction(BLINK_GPIO, GPIO_MODE_OUTPUT);
}

#endif

// Interrupt service routine (ISR)
static void IRAM_ATTR photo_sensor_isr_handler(void *arg) {
    int level = gpio_get_level(PHOTO_SENSOR_PIN);
    ESP_EARLY_LOGI("PHOTO", "Triggered! State: %d", level);
    if( level == 0 ) {
        gpio_set_level(BLINK_GPIO, 0);
    }
    else {
        gpio_set_level(BLINK_GPIO, 1);
    }
}

// GPIO setup
void setup_photo_sensor_interrupt() {
    gpio_config_t io_conf = {
        .intr_type = GPIO_INTR_ANYEDGE,  // Trigger on both rising & falling edges
        .pin_bit_mask = (1ULL << PHOTO_SENSOR_PIN),
        .mode = GPIO_MODE_INPUT,
        .pull_up_en = GPIO_PULLUP_DISABLE,  
        .pull_down_en = GPIO_PULLDOWN_DISABLE
    };
    gpio_config(&io_conf);

    // Install GPIO ISR service
    gpio_install_isr_service(0);
    gpio_isr_handler_add(PHOTO_SENSOR_PIN, photo_sensor_isr_handler, NULL);

    ESP_LOGI("PHOTO", "Photomicrosensor interrupt configured on GPIO %d", PHOTO_SENSOR_PIN);
}

void app_main(void)
{

    /* Configure the peripheral according to the LED type */
    configure_led();
    setup_photo_sensor_interrupt();

    while (1) {
        /*ESP_LOGI(TAG, "Turning the LED %s!", s_led_state == true ? "ON" : "OFF");
        blink_led();
        // Toggle the LED state
        s_led_state = !s_led_state;*/
        vTaskDelay(CONFIG_BLINK_PERIOD / portTICK_PERIOD_MS);
    }
}