77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
#include "ntp.h"
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#include <string.h>
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#include <sys/time.h>
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#include <time.h>
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#include "esp_attr.h"
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#include "esp_event.h"
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#include "esp_log.h"
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#include "esp_netif_sntp.h"
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#include "esp_sleep.h"
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#include "esp_sntp.h"
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#include "esp_system.h"
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#include "lwip/ip_addr.h"
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#include "nvs_flash.h"
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#include "sdkconfig.h"
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static const char* TAG = "NTP";
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void obtain_time(void) {
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ESP_LOGI(TAG, "Initializing SNTP");
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esp_sntp_config_t config =
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ESP_NETIF_SNTP_DEFAULT_CONFIG(CONFIG_SNTP_TIME_SERVER);
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config.start = false;
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config.server_from_dhcp = true;
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config.renew_servers_after_new_IP = true;
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config.index_of_first_server = 1;
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config.ip_event_to_renew = IP_EVENT_STA_GOT_IP;
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esp_netif_sntp_init(&config);
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ESP_LOGI(TAG, "Starting SNTP");
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esp_netif_sntp_start();
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// wait for time to be set
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time_t now = 0;
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struct tm timeinfo = {0};
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int retry = 0;
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const int retry_count = 15;
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while (esp_netif_sntp_sync_wait(2000 / portTICK_PERIOD_MS) ==
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ESP_ERR_TIMEOUT &&
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++retry < retry_count) {
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ESP_LOGI(TAG, "Waiting for system time to be set... (%d/%d)", retry,
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retry_count);
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}
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time(&now);
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localtime_r(&now, &timeinfo);
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esp_netif_sntp_deinit();
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}
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esp_err_t init_ntp(void) {
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time_t now;
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struct tm timeinfo;
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time(&now);
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localtime_r(&now, &timeinfo);
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if (timeinfo.tm_year < (2016 - 1900)) {
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ESP_LOGI(
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TAG,
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"Time is not set yet. Connecting to WiFi and getting time over NTP.");
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obtain_time();
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}
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char strftime_buf[64];
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// Set timezone to Eastern Standard Time and print local time
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setenv("TZ", "CET-1CEST,M3.5.0,M10.5.0/3", 1);
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tzset();
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time(&now);
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localtime_r(&now, &timeinfo);
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strftime(strftime_buf, sizeof(strftime_buf), "%c", &timeinfo);
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ESP_LOGI(TAG, "The current date/time in Berlin/Europe is: %s", strftime_buf);
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return ESP_OK;
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}
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