mirror of
https://github.com/espressif/ESP8266_RTOS_SDK.git
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105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/* LwIP SNTP example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_system.h"
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#include "esp_log.h"
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#include "esp_netif.h"
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#include "esp_event.h"
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#include "protocol_examples_common.h"
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#include "nvs.h"
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#include "nvs_flash.h"
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#include "driver/gpio.h"
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#include "lwip/apps/sntp.h"
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static const char *TAG = "sntp_example";
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static void initialize_sntp(void)
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{
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ESP_LOGI(TAG, "Initializing SNTP");
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sntp_setoperatingmode(SNTP_OPMODE_POLL);
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sntp_setservername(0, "pool.ntp.org");
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sntp_init();
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}
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static void obtain_time(void)
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{
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initialize_sntp();
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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 = 10;
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while (timeinfo.tm_year < (2016 - 1900) && ++retry < retry_count) {
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ESP_LOGI(TAG, "Waiting for system time to be set... (%d/%d)", retry, retry_count);
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vTaskDelay(2000 / portTICK_PERIOD_MS);
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time(&now);
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localtime_r(&now, &timeinfo);
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}
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}
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static void sntp_example_task(void *arg)
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{
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time_t now;
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struct tm timeinfo;
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char strftime_buf[64];
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time(&now);
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localtime_r(&now, &timeinfo);
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// Is time set? If not, tm_year will be (1970 - 1900).
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if (timeinfo.tm_year < (2016 - 1900)) {
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ESP_LOGI(TAG, "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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// Set timezone to Eastern Standard Time and print local time
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// setenv("TZ", "EST5EDT,M3.2.0/2,M11.1.0", 1);
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// tzset();
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// Set timezone to China Standard Time
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setenv("TZ", "CST-8", 1);
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tzset();
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while (1) {
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// update 'now' variable with current time
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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_LOGE(TAG, "The current date/time error");
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} else {
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strftime(strftime_buf, sizeof(strftime_buf), "%c", &timeinfo);
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ESP_LOGI(TAG, "The current date/time in Shanghai is: %s", strftime_buf);
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}
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ESP_LOGI(TAG, "Free heap size: %d\n", esp_get_free_heap_size());
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vTaskDelay(1000 / portTICK_RATE_MS);
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}
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}
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void app_main()
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{
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ESP_ERROR_CHECK(nvs_flash_init());
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ESP_ERROR_CHECK(esp_netif_init());
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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ESP_ERROR_CHECK(example_connect());
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// SNTP service uses LwIP, please allocate large stack space.
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xTaskCreate(sntp_example_task, "sntp_example_task", 2048, NULL, 10, NULL);
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}
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