FridgeSensor/main/main.c

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

/* 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

#define ACTIVE_THRESHOLD_MS 5000  // 60 seconds in milliseconds

static void configure_led(void)
{
    ESP_LOGI("LED", "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);
}

// GPIO setup
void setup_photo_sensor() {
    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);

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

void check_sensor_active_time(bool fridgeDoorClosed) {

    static int64_t activeStartTime = 0;

    //ESP_EARLY_LOGI("CHECK", "State: %s", fridgeDoorClosed == true ? "CLOSED" : "OPEN");

    if (fridgeDoorClosed == false) {
        if (activeStartTime == 0) {
            activeStartTime = esp_timer_get_time() / 1000; // Convert to milliseconds
            ESP_LOGI("CHECK", "Door timer start time: %lld", activeStartTime);
        } else {
            int64_t elapsedTime = (esp_timer_get_time() / 1000) - activeStartTime;
            //ESP_LOGI("CHECK", "Elapsed time: %lld", elapsedTime);
            if (elapsedTime > ACTIVE_THRESHOLD_MS) {
                enableNotificationSound(true);
            }
        }
    } else {
        activeStartTime = 0;
        enableNotificationSound(false);
    }
}

void read_photo_sensor_task(void *pvParameters) {
    static bool prevState = false;
    while (1) {
        bool fridgeDoorClosed = gpio_get_level(PHOTO_SENSOR_PIN) == 0 ? false : true;
        if (fridgeDoorClosed != prevState) {
            prevState = fridgeDoorClosed;
            ESP_EARLY_LOGI("PHOTO", "Triggered! State: %s", fridgeDoorClosed == true ? "CLOSED" : "OPEN");
            if( fridgeDoorClosed == false ) {
                gpio_set_level(BLINK_GPIO, 1);
            }
            else {
                gpio_set_level(BLINK_GPIO, 0);
            }
        }

        check_sensor_active_time(fridgeDoorClosed);

        vTaskDelay(pdMS_TO_TICKS(50)); // Delay 50ms (20 times per second)

    }
}

void app_main(void)
{

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

    xTaskCreate(read_photo_sensor_task, "read_sensor_task", 2048, NULL, 10, NULL);

}