ESP32 Forum

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#include <time.h>
#include <sys/time.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_deep_sleep.h"
#include "esp_log.h"
#include "esp32/ulp.h"
#include "driver/touch_pad.h"
#include "driver/adc.h"
#include "driver/rtc_io.h"
#include "soc/rtc_cntl_reg.h"
#include "soc/sens_reg.h"
#include "soc/rtc.h"

static RTC_DATA_ATTR struct timeval sleep_enter_time;

void app_main()
{
    struct timeval now;
    gettimeofday(&now, NULL);
    int sleep_time_ms = (now.tv_sec - sleep_enter_time.tv_sec) * 1000 + (now.tv_usec - sleep_enter_time.tv_usec) / 1000;

    printf("-----------------------------------------------------------------------------\n");
    switch (esp_deep_sleep_get_wakeup_cause()) {
        case ESP_DEEP_SLEEP_WAKEUP_EXT1: {
            uint64_t wakeup_pin_mask = esp_deep_sleep_get_ext1_wakeup_status();
            if (wakeup_pin_mask != 0) {
                int pin = __builtin_ffsll(wakeup_pin_mask) - 1;
                printf("Wake up from GPIO %d\n", pin);
            } else {
                printf("Wake up from GPIO\n");
            }
            break;
        }
        case ESP_DEEP_SLEEP_WAKEUP_TIMER: {
            printf("Wake up from timer. Time spent in deep sleep: %dms\n", sleep_time_ms);
            break;
        }
        case ESP_DEEP_SLEEP_WAKEUP_UNDEFINED:
        default:
            printf("Not a deep sleep reset\n");
    }
    printf("-----------------------------------------------------------------------------\n");

    vTaskDelay(1000 / portTICK_PERIOD_MS);

    const int wakeup_time_sec = 20;
    printf("Enabling timer wakeup, %ds\n", wakeup_time_sec);
    esp_deep_sleep_enable_timer_wakeup(wakeup_time_sec * 1000000);

    const int ext_wakeup_pin_1 = 25;
    const uint64_t ext_wakeup_pin_1_mask = 1ULL << ext_wakeup_pin_1;
    const int ext_wakeup_pin_2 = 26;
    const uint64_t ext_wakeup_pin_2_mask = 1ULL << ext_wakeup_pin_2;

    printf("Enabling EXT1 wakeup on pins GPIO%d, GPIO%d\n", ext_wakeup_pin_1, ext_wakeup_pin_2);
    esp_deep_sleep_enable_ext1_wakeup(ext_wakeup_pin_1_mask | ext_wakeup_pin_2_mask, ESP_EXT1_WAKEUP_ANY_HIGH);

    printf("Entering deep sleep\n");
    gettimeofday(&sleep_enter_time, NULL);

    esp_deep_sleep_start();
}

Code: Select all

----------------------------
Wake up from GPIO 26
-----------------------------------------------------------------------------
Enabling timer wakeup, 20s
Enabling EXT1 wakeup on pins GPIO25, GPIO26
Entering deep sleep