esp-open-rtos/examples/sntp/sntp_example.c

/*
 * Test code for SNTP on esp-open-rtos.
 *
 * Jesus Alonso (doragasu)
 */
#include <espressif/esp_common.h>
#include <esp/uart.h>

#include <string.h>
#include <stdio.h>

#include <FreeRTOS.h>
#include <task.h>

#include <lwip/err.h>
#include <lwip/sockets.h>
#include <lwip/sys.h>
#include <lwip/netdb.h>
#include <lwip/dns.h>

#include <ssid_config.h>

/* Add extras/sntp component to makefile for this include to work */
#include <sntp.h>
#include <time.h>

#define SNTP_SERVERS 	"0.pool.ntp.org", "1.pool.ntp.org", \
						"2.pool.ntp.org", "3.pool.ntp.org"

#define vTaskDelayMs(ms)	vTaskDelay((ms)/portTICK_RATE_MS)
#define UNUSED_ARG(x)	(void)x

void sntp_tsk(void *pvParameters)
{
	char *servers[] = {SNTP_SERVERS};
	UNUSED_ARG(pvParameters);

	/* Wait until we have joined AP and are assigned an IP */
	while (sdk_wifi_station_get_connect_status() != STATION_GOT_IP) {
		vTaskDelayMs(100);
	}

	/* Start SNTP */
	printf("Starting SNTP... ");
	/* SNTP will request an update each 5 minutes */
	sntp_set_update_delay(5*60000);
	/* Set GMT+1 zone, daylight savings off */
	const struct timezone tz = {1*60, 0};
	/* SNTP initialization */
	sntp_initialize(&tz);
	/* Servers must be configured right after initialization */
	sntp_set_servers(servers, sizeof(servers) / sizeof(char*));
	printf("DONE!\n");

	/* Print date and time each 5 seconds */
	while(1) {
		vTaskDelayMs(5000);
		time_t ts = time(NULL);
		printf("TIME: %s", ctime(&ts));
	}
}

void user_init(void)
{
    uart_set_baud(0, 115200);
    printf("SDK version:%s\n", sdk_system_get_sdk_version());

    struct sdk_station_config config = {
        .ssid = WIFI_SSID,
        .password = WIFI_PASS,
    };

    /* required to call wifi_set_opmode before station_set_config */
    sdk_wifi_set_opmode(STATION_MODE);
    sdk_wifi_station_set_config(&config);

    xTaskCreate(sntp_tsk, (signed char *)"SNTP", 1024, NULL, 1, NULL);
}