wemosでntp

概要

wemos d1で、ntpを使ってみた。

サンプルコード

#include <ESP8266WiFi.h>
#include <TZ.h>

const char * ssid = "****";
const char * password = "****";

void setup(void) {
	Serial.begin(115200);
	WiFi.begin(ssid, password);
	Serial.println("");
	while (WiFi.status() != WL_CONNECTED) 
	{
		delay(500);
		Serial.print(".");
	}
	Serial.println("");
	Serial.print("Connected to ");
	Serial.println(ssid);
	Serial.print("IP address: ");
	Serial.println(WiFi.localIP());
	configTime(TZ_Asia_Tokyo, "pool.ntp.org");
}
void loop(void) {
	static const char * wd[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
	time_t t = time(NULL);
	struct tm * tm = gmtime(&t);
	char buff[12];
	sprintf(buff, "%04d/%02d/%02d(%s) ", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, wd[tm->tm_wday]);
	Serial.print("gmtime: ");
	Serial.print(buff);
	sprintf(buff, "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec);
	Serial.println(buff);
	time_t t2 = mktime(tm) + 3600;
    struct tm * tm2 = localtime(&t2);
	Serial.print("asctime: ");
	Serial.println(asctime(tm2));
	time_t now = time(nullptr);
	Serial.print("Local time: ");
	Serial.println(ctime(&now));
	delay(3000);
}

以上。