Weather_ESP/components/clock/clock.c

/*
 * clock.c
 *
 *  Created on: Apr 23, 2020
 *      Author: chris
 */

#include "clock.h"

const char* TAG = "clock";

void time_sync_notification_cb(struct timeval *tv)
{
	ESP_LOGI(TAG, "Synchronized time to PTB!");
}

esp_err_t init_clock()
{
	ESP_LOGI(TAG, "Initializing SNTP");
	esp_event_loop_create_default();
    sntp_setoperatingmode(SNTP_OPMODE_POLL);
    sntp_setservername(0, "ptbtime1.ptb.de");
    sntp_set_time_sync_notification_cb(time_sync_notification_cb);
    sntp_set_sync_mode(SNTP_SYNC_MODE_IMMED);
    sntp_init();

	// wait for time to be set
    time_t now = 0;
    struct tm timeinfo = { 0 };
    int retry = 0;
    const int retry_count = 10;
    while (sntp_get_sync_status() == SNTP_SYNC_STATUS_RESET && ++retry < retry_count) {
        ESP_LOGI(TAG, "Waiting for system time to be set... (%d/%d)", retry, retry_count);
        vTaskDelay(2000 / portTICK_PERIOD_MS);
    }
    time(&now);
    localtime_r(&now, &timeinfo);

    setenv("TZ", "CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00", 1);
	tzset();

	return ESP_OK;
}

void get_time(time_str_t* res)
{
	time_t now;
	struct tm timeinfo;
	time(&now);
	localtime_r(&now, &timeinfo);

	char date_str[64];
	char time_str[64];
	strftime(date_str, sizeof(date_str), "%d.%m.%Y", &timeinfo);
	strftime(time_str, sizeof(time_str), "%H:%M:%S", &timeinfo);
	strcpy(res->date_str, date_str);
	strcpy(res->time_str, time_str);
}