ARDUINO IDE ESP8266 NTP SERVER TIMEZONE

ARDUINO IDE ESP8266 NTP SERVER TIMEZONE

Heute zeige ich euch wie man mit dem ESP8266 die Zeit von einem Zeitserver mit automatischer Anpassung an Sommer und Winterzeit abholt und ausgibt.

Da wir das Rad hier und heute nicht neu erfinden werden, laden wir uns dazu zwei Bibliotheken aus dem Internet runter und binden Diese in die Arduino IDE ein.

• Time
• Timezone

Beide Links führen euch nach Github.

Dort einfach auf „Download ZIP“ klicken und beide Bibliotheken in die Arduino IDE einbinden.
Wer nicht genau weis wie man da vorgehen muss der kann sich hier schlau machen.

Das Programm erscheint recht lang, ist aber simpel.
Bevor Ihr das Programm auf euer ESP ladet gebt Ihr bitte noch in Zeile 13 und 14 eure SSID und das Passwort eures Routers ein.

Nach dem Upload, verbindet sich das ESP8266 mit eurem Router, holt die Zeit ab, stellt Sommer oder Winterzeit ein und gibt Diese dann Seriell aus.
Vergesst nicht die Baudrate in eurem Serial Monitor auf 76400 Baud zu stellen.

/*
ESP8266 : NTP Time + Timezone
Created 07 May 2016 by Ralf Bohnen - www.Arduinoclub.de
This example code is in the public domain.
*/

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <WiFiUdp.h>
#include <TimeLib.h>  //by Paul Stoffregen, not included in the Arduino IDE !!!
#include <Timezone.h> //by Jack Christensen, not included in the Arduino IDE !!!

const char WiFiSSID[] = "deine SSID";     //### your Router SSID
const char WiFiPSK[]  = "dein Passwort"; //### your Router Password

#define DBG_OUTPUT_PORT Serial

unsigned long previousMillis = 0;
const long interval = 1000;
volatile bool wasConnected = false;

bool isConnected(long timeOutSec) {
	timeOutSec = timeOutSec * 1000;
	int z = 0;
	while (WiFi.status() != WL_CONNECTED) {
		delay(200);
		DBG_OUTPUT_PORT.print(".");
		if (z == timeOutSec / 200) { return false; }
		z++;
	}
	return true;
}

//### NTP, TIME & TIMEZONE ###################################################################


//UDP
WiFiUDP Udp;
unsigned int localPort = 123;

//NTP Server
char ntpServerName1[] = "ntp1.t-online.de";
char ntpServerName2[] = "time.nist.gov";

//Timezone
//Central European Time (Frankfurt, Paris)
TimeChangeRule CEST = { "CEST", Last, Sun, Mar, 2, 120 };     //Central European Summer Time
TimeChangeRule CET = { "CET ", Last, Sun, Oct, 3, 60 };       //Central European Standard Time
Timezone CE(CEST, CET);
TimeChangeRule *tcr;        //pointer to the time change rule, use to get the TZ abbrev
time_t utc, local;


const int NTP_PACKET_SIZE = 48; // NTP time is in the first 48 bytes of message
byte packetBuffer[NTP_PACKET_SIZE]; //buffer to hold incoming & outgoing packets

bool getNtpTime(char* ntpServerName)
{
	DBG_OUTPUT_PORT.print(F("NTP request..."));
	if (timeStatus() == timeSet) {
		DBG_OUTPUT_PORT.println(F("not necessary"));
		return true;
	}

	IPAddress ntpServerIP; // NTP server's ip address

	while (Udp.parsePacket() > 0); // discard any previously received packets
	DBG_OUTPUT_PORT.println(F("Transmit NTP Request"));
	// get a random server from the pool
	WiFi.hostByName(ntpServerName, ntpServerIP);
	DBG_OUTPUT_PORT.print(ntpServerName);
	DBG_OUTPUT_PORT.print(": ");
	DBG_OUTPUT_PORT.println(ntpServerIP);
	sendNTPpacket(ntpServerIP);
	uint32_t beginWait = millis();
	while (millis() - beginWait < 1500) {
		int size = Udp.parsePacket();
		if (size >= NTP_PACKET_SIZE) {
			DBG_OUTPUT_PORT.println(F("Receive NTP Response"));
			Udp.read(packetBuffer, NTP_PACKET_SIZE);  // read packet into the buffer
			unsigned long secsSince1900;
			// convert four bytes starting at location 40 to a long integer
			secsSince1900 = (unsigned long)packetBuffer[40] << 24;
			secsSince1900 |= (unsigned long)packetBuffer[41] << 16;
			secsSince1900 |= (unsigned long)packetBuffer[42] << 8;
			secsSince1900 |= (unsigned long)packetBuffer[43];
			setTime(secsSince1900 - 2208988800UL);
			//setTime(23, 55, 0, 30, 3, 2016); //simulate time for test
			return true;
		}
	}
	DBG_OUTPUT_PORT.println(F("FATAL ERROR : No NTP Response."));
	return false; // return 0 if unable to get the time
}

// send an NTP request to the time server at the given address
void sendNTPpacket(IPAddress &address)
{
	// set all bytes in the buffer to 0
	memset(packetBuffer, 0, NTP_PACKET_SIZE);
	// Initialize values needed to form NTP request
	// (see URL above for details on the packets)
	packetBuffer[0] = 0b11100011;   // LI, Version, Mode
	packetBuffer[1] = 0;     // Stratum, or type of clock
	packetBuffer[2] = 6;     // Polling Interval
	packetBuffer[3] = 0xEC;  // Peer Clock Precision
							 // 8 bytes of zero for Root Delay & Root Dispersion
	packetBuffer[12] = 49;
	packetBuffer[13] = 0x4E;
	packetBuffer[14] = 49;
	packetBuffer[15] = 52;
	// all NTP fields have been given values, now
	// you can send a packet requesting a timestamp:
	Udp.beginPacket(address, 123); //NTP requests are to port 123
	Udp.write(packetBuffer, NTP_PACKET_SIZE);
	Udp.endPacket();
}

//Function to return the compile date and time as a time_t value
time_t compileTime(void)
{
#define FUDGE 25        //fudge factor to allow for compile time (seconds, YMMV)
	char *compDate = __DATE__, *compTime = __TIME__, *months = "JanFebMarAprMayJunJulAugSepOctNovDec";
	char chMon[3], *m;
	int d, y;
	tmElements_t tm;
	time_t t;
	strncpy(chMon, compDate, 3);
	chMon[3] = '\0';
	m = strstr(months, chMon);
	tm.Month = ((m - months) / 3 + 1);
	tm.Day = atoi(compDate + 4);
	tm.Year = atoi(compDate + 7) - 1970;
	tm.Hour = atoi(compTime);
	tm.Minute = atoi(compTime + 3);
	tm.Second = atoi(compTime + 6);
	t = makeTime(tm);
	return t + FUDGE;        //add fudge factor to allow for compile time
}

void printTime(time_t t)
{
	sPrintI00(hour(t));
	sPrintDigits(minute(t));
	sPrintDigits(second(t));
	DBG_OUTPUT_PORT.print(' ');
	DBG_OUTPUT_PORT.print(dayShortStr(weekday(t)));
	DBG_OUTPUT_PORT.print(' ');
	sPrintI00(day(t));
	DBG_OUTPUT_PORT.print(' ');
	DBG_OUTPUT_PORT.print(monthShortStr(month(t)));
	DBG_OUTPUT_PORT.print(' ');
	DBG_OUTPUT_PORT.print(year(t));
	DBG_OUTPUT_PORT.println(' ');
}

//Print an integer in "00" format (with leading zero).
//Input value assumed to be between 0 and 99.
void sPrintI00(int val)
{
	if (val < 10) DBG_OUTPUT_PORT.print('0');
	DBG_OUTPUT_PORT.print(val, DEC);
	return;
}

//Print an integer in ":00" format (with leading zero).
//Input value assumed to be between 0 and 99.
void sPrintDigits(int val)
{
	DBG_OUTPUT_PORT.print(':');
	if (val < 10) DBG_OUTPUT_PORT.print('0');
	DBG_OUTPUT_PORT.print(val, DEC);
}
//############################################################################################

void setup()
{
	DBG_OUTPUT_PORT.begin(76400);
	DBG_OUTPUT_PORT.setDebugOutput(true);
	DBG_OUTPUT_PORT.println(F("ArduinoClub-NTP-Timezone"));

	WiFi.mode(WIFI_STA);
	WiFi.begin(WiFiSSID, WiFiPSK);

	if (isConnected(30)) {
		wasConnected = true;
		DBG_OUTPUT_PORT.println(F("Starting UDP"));
		Udp.begin(localPort);
		DBG_OUTPUT_PORT.print(F("Local port: "));
		DBG_OUTPUT_PORT.println(Udp.localPort());
		DBG_OUTPUT_PORT.println(F("waiting for sync"));
	}


    /* add setup code here */

}

void loop()
{
	unsigned long currentMillis = millis();
	if (currentMillis - previousMillis >= interval) {
		previousMillis = currentMillis;
		if (!isConnected(10) && wasConnected) { delay(200); ESP.restart(); }
		if (!getNtpTime(ntpServerName1)) { getNtpTime(ntpServerName2); }
		local = CE.toLocal(now(), &tcr);
		printTime(local);
	}

	/* add main program code here */

}

Alles wird gut.

Euer ArduinoClub Team