Arduino: Ethernet NTP Client - Revision history

Onnowpurbo: /* Code */

2018-05-28T12:01:08Z

Code

← Older revision		Revision as of 12:01, 28 May 2018
Line 153:		Line 153:

	==Code==		==Code==


	/*		/*

	Udp NTP Client		Udp NTP Client

Line 185:		Line 185:

	unsigned int localPort = 8888; // local port to listen for UDP packets		unsigned int localPort = 8888; // local port to listen for UDP packets
			const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message
	~~char timeServer[] = "time.nist.gov"; // time.nist.gov NTP server~~

	const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message

	byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets		byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets

	// A UDP instance to let us send and receive packets over UDP		// A UDP instance to let us send and receive packets over UDP
	EthernetUDP Udp;		EthernetUDP Udp;
			IPAddress IPntpserver(128, 138, 140, 44 );

	void setup() {		void setup() {
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	; // wait for serial port to connect. Needed for native USB port only		; // wait for serial port to connect. Needed for native USB port only
	}		}


	// start Ethernet and UDP		// start Ethernet and UDP
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	void loop() {		void loop() {
	sendNTPpacket(~~timeServer~~); // send an NTP packet to a time server		Serial.println("start");
			sendNTPpacket(); // send an NTP packet to a time server

	// wait to see if a reply is available		// wait to see if a reply is available
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	// the timestamp starts at byte 40 of the received packet and is four bytes,		// the timestamp starts at byte 40 of the received packet and is four bytes,
	// or two words, long. First, extract the two words:		// or two words, long. First, extract the two words:

	unsigned long highWord = word(packetBuffer[40], packetBuffer[41]);		unsigned long highWord = word(packetBuffer[40], packetBuffer[41]);
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	Serial.println(epoch);		Serial.println(epoch);


	// print the hour, minute and second:		// print the hour, minute and second:
	Serial.print("The UTC time is "); // UTC is the time at Greenwich Meridian (GMT)		Serial.print("The UTC time is "); // UTC is the time at Greenwich Meridian (GMT)
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	// send an NTP request to the time server at the given address		// send an NTP request to the time server at the given address
	void sendNTPpacket(~~char* address~~) {		void sendNTPpacket() {
	// set all bytes in the buffer to 0		// set all bytes in the buffer to 0
	memset(packetBuffer, 0, NTP_PACKET_SIZE);		memset(packetBuffer, 0, NTP_PACKET_SIZE);
Line 278:		Line 274:
	packetBuffer[13] = 0x4E;		packetBuffer[13] = 0x4E;
	packetBuffer[14] = 49;		packetBuffer[14] = 49;
	packetBuffer[15] = 52;		packetBuffer[15] = 52;

	// all NTP fields have been given values, now		// all NTP fields have been given values, now
	// you can send a packet requesting a timestamp:		// you can send a packet requesting a timestamp:
	Udp.beginPacket(~~address~~, 123); //NTP requests are to port 123		Udp.beginPacket(IPntpserver, 123); //NTP requests are to port 123
	Udp.write(packetBuffer, NTP_PACKET_SIZE);		Udp.write(packetBuffer, NTP_PACKET_SIZE);
	Udp.endPacket();		Udp.endPacket();

Onnowpurbo: /* Code Versi Sederhana */

2018-05-25T10:07:49Z

Code Versi Sederhana

← Older revision		Revision as of 10:07, 25 May 2018
Line 13:		Line 13:

	==Code Versi Sederhana==		==Code Versi Sederhana==



	/*		/*

	Udp NTP Client		Udp NTP Client

	Get the time from a Network Time Protocol (NTP) time server		Get the time from a Network Time Protocol (NTP) time server
Line 28:		Line 30:
	by Tom Igoe		by Tom Igoe
	modified 02 Sept 2015		modified 02 Sept 2015
	by Arturo Guadalupi		by Arturo Guadalupi

	This code is in the public domain.		This code is in the public domain.

	*/		*/

	#include <SPI.h>		#include <SPI.h>
Line 38:		Line 40:
	#include <EthernetUdp.h>		#include <EthernetUdp.h>

			// Enter a MAC address for your controller below.
			// Newer Ethernet shields have a MAC address printed on a sticker on the shield
	byte mac[] = {		byte mac[] = {
	0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED		0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
	};		};
			unsigned int localPort = 8888; // local port to listen for UDP packets

	~~unsigned int localPort = 8888; // local port to listen for UDP packets~~		char timeServer[] = "time.nist.gov"; // id.pool.ntp.org NTP server
	char timeServer[] = "time.nist.gov"; // ~~time~~.~~nist~~.~~gov~~ NTP server		IPAddress remoteIP(132,163,97,1);
	const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message		const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message
	byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets		byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets

			// A UDP instance to let us send and receive packets over UDP
	EthernetUDP Udp;		EthernetUDP Udp;

			// Initialize the Ethernet client library
			// with the IP address and port of the server
			// that you want to connect to (port 80 is default for HTTP):
			EthernetClient client;

	void setup() {		void setup() {
	// Open serial communications and wait for port to open:		// Open serial communications and wait for port to open:
	Serial.begin(9600);		Serial.begin(9600);
			// this check is only needed on the Leonardo:
	while (!Serial) {		while (!Serial) {
	; // wait for serial port to connect. Needed for native USB port only		; // wait for serial port to connect. Needed for native USB port only
	}		}


	// start Ethernet ~~and UDP~~		// start the Ethernet connection:
	if (Ethernet.begin(mac) == 0) {		if (Ethernet.begin(mac) == 0) {
	Serial.println("Failed to configure Ethernet using DHCP");		Serial.println("Failed to configure Ethernet using DHCP");
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	for (;;)		for (;;)
	;		;
	}		}
			// print your local IP address:
	Udp.begin(localPort);		Udp.begin(localPort);
	}		}

	void loop() {		void loop() {
	sendNTPpacket(timeServer); // send an NTP packet to a time server		sendNTPpacket(timeServer); // send an NTP packet to a time server

	// wait to see if a reply is available		// wait to see if a reply is available
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	if (Udp.parsePacket()) {		if (Udp.parsePacket()) {
	// We've received a packet, read the data from it		// We've received a packet, read the data from it
	Udp.read(packetBuffer, NTP_PACKET_SIZE); // read the packet into the buffer		Udp.read(packetBuffer, NTP_PACKET_SIZE); // read the packet into the buffer

			// the timestamp starts at byte 40 of the received packet and is four bytes,
			// or two words, long. First, extract the two words:

	unsigned long highWord = word(packetBuffer[40], packetBuffer[41]);		unsigned long highWord = word(packetBuffer[40], packetBuffer[41]);
	unsigned long lowWord = word(packetBuffer[42], packetBuffer[43]);		unsigned long lowWord = word(packetBuffer[42], packetBuffer[43]);
			// combine the four bytes (two words) into a long integer
			// this is NTP time (seconds since Jan 1 1900):
	unsigned long secsSince1900 = highWord << 16 \| lowWord;		unsigned long secsSince1900 = highWord << 16 \| lowWord;
			Serial.print("Seconds since Jan 1 1900 = ");
			Serial.println(secsSince1900);

	// now convert NTP time into everyday time:		// now convert NTP time into everyday time:
	Serial.print("Unix time = ");		Serial.print("Unix time = ");
			// Unix time starts on Jan 1 1970. In seconds, that's 2208988800:
	const unsigned long seventyYears = 2208988800UL;		const unsigned long seventyYears = 2208988800UL;
	// subtract seventy years:		// subtract seventy years:
	unsigned long epoch = secsSince1900 - seventyYears;		unsigned long epoch = secsSince1900 - seventyYears;
	// print Unix time:		// print Unix time:
	Serial.println(epoch);		Serial.println(epoch);

			// print the hour, minute and second:
			Serial.print("The UTC time is "); // UTC is the time at Greenwich Meridian (GMT)
			Serial.print((epoch % 86400L) / 3600); // print the hour (86400 equals secs per day)
			Serial.print(':');
			if (((epoch % 3600) / 60) < 10) {
			// In the first 10 minutes of each hour, we'll want a leading '0'
			Serial.print('0');
	}		}
			Serial.print((epoch % 3600) / 60); // print the minute (3600 equals secs per minute)
			Serial.print(':');
			if ((epoch % 60) < 10) {
			// In the first 10 seconds of each minute, we'll want a leading '0'
			Serial.print('0');
			}
			Serial.println(epoch % 60); // print the second
			}
	// wait ten seconds before asking for the time again		// wait ten seconds before asking for the time again
	delay(10000);		delay(10000);
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	packetBuffer[13] = 0x4E;		packetBuffer[13] = 0x4E;
	packetBuffer[14] = 49;		packetBuffer[14] = 49;
	packetBuffer[15] = 52;		packetBuffer[15] = 52;

	// all NTP fields have been given values, now		// all NTP fields have been given values, now
	// you can send a packet requesting a timestamp:		// you can send a packet requesting a timestamp:
	Udp.beginPacket(~~address~~, 123); //NTP requests are to port 123		Udp.beginPacket(remoteIP, 123); //NTP requests are to port 123
	Udp.write(packetBuffer, NTP_PACKET_SIZE);		Udp.write(packetBuffer, NTP_PACKET_SIZE);
	Udp.endPacket();		Udp.endPacket();

Onnowpurbo: /* Kebutuhan Hardware */

2016-02-23T03:53:58Z

Kebutuhan Hardware

@@ Line 7: / Line 7: @@
 * Arduino atau Genuino Board
 * Arduino Ethernet Shield
 ==Code==

Onnowpurbo: /* Code */

2015-11-20T02:58:13Z

Code

← Older revision		Revision as of 02:58, 20 November 2015
Line 32:		Line 32:

	*/		*/

	#include <SPI.h>		#include <SPI.h>
	#include <Ethernet.h>		#include <Ethernet.h>
Line 52:		Line 52:

	// A UDP instance to let us send and receive packets over UDP		// A UDP instance to let us send and receive packets over UDP
	EthernetUDP Udp;		EthernetUDP Udp;

	void setup() {		void setup() {
Line 145:		Line 145:
	Udp.endPacket();		Udp.endPacket();
	}		}






	==Referensi==		==Referensi==

	* https://www.arduino.cc/en/Tutorial/UdpNtpClient		* https://www.arduino.cc/en/Tutorial/UdpNtpClient

Onnowpurbo: New page: Sumber: https://www.arduino.cc/en/Tutorial/UdpNtpClient Dalam contoh ini, kita akan menggunakan Ethernet Shield dan Arduino untuk query Network Time Protocol (NTP) server. Dengan cara in...

2015-11-20T02:57:30Z

New page: Sumber: https://www.arduino.cc/en/Tutorial/UdpNtpClient Dalam contoh ini, kita akan menggunakan Ethernet Shield dan Arduino untuk query Network Time Protocol (NTP) server. Dengan cara in...

New page

Sumber: https://www.arduino.cc/en/Tutorial/UdpNtpClient

Dalam contoh ini, kita akan menggunakan Ethernet Shield dan Arduino untuk query Network Time Protocol (NTP) server. Dengan cara ini, Arduiono akan dapat memperoleh waktu / time dari Internet.

==Kebutuhan Hardware==

* Arduino atau Genuino Board
* Arduino Ethernet Shield

==Code==

/*

Udp NTP Client

Get the time from a Network Time Protocol (NTP) time server
Demonstrates use of UDP sendPacket and ReceivePacket
For more on NTP time servers and the messages needed to communicate with them,
see http://en.wikipedia.org/wiki/Network_Time_Protocol

created 4 Sep 2010
by Michael Margolis
modified 9 Apr 2012
by Tom Igoe
modified 02 Sept 2015
by Arturo Guadalupi

This code is in the public domain.

*/

#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h>

// Enter a MAC address for your controller below.
// Newer Ethernet shields have a MAC address printed on a sticker on the shield
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};

unsigned int localPort = 8888; // local port to listen for UDP packets

char timeServer[] = "time.nist.gov"; // time.nist.gov NTP server

const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message

byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets

// A UDP instance to let us send and receive packets over UDP
EthernetUDP Udp;

void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}

// start Ethernet and UDP
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
// no point in carrying on, so do nothing forevermore:
for (;;)
;
}
Udp.begin(localPort);
}

void loop() {
sendNTPpacket(timeServer); // send an NTP packet to a time server

// wait to see if a reply is available
delay(1000);
if (Udp.parsePacket()) {
// We've received a packet, read the data from it
Udp.read(packetBuffer, NTP_PACKET_SIZE); // read the packet into the buffer

// the timestamp starts at byte 40 of the received packet and is four bytes,
// or two words, long. First, extract the two words:

unsigned long highWord = word(packetBuffer[40], packetBuffer[41]);
unsigned long lowWord = word(packetBuffer[42], packetBuffer[43]);
// combine the four bytes (two words) into a long integer
// this is NTP time (seconds since Jan 1 1900):
unsigned long secsSince1900 = highWord << 16 | lowWord;
Serial.print("Seconds since Jan 1 1900 = ");
Serial.println(secsSince1900);

// now convert NTP time into everyday time:
Serial.print("Unix time = ");
// Unix time starts on Jan 1 1970. In seconds, that's 2208988800:
const unsigned long seventyYears = 2208988800UL;
// subtract seventy years:
unsigned long epoch = secsSince1900 - seventyYears;
// print Unix time:
Serial.println(epoch);

// print the hour, minute and second:
Serial.print("The UTC time is "); // UTC is the time at Greenwich Meridian (GMT)
Serial.print((epoch % 86400L) / 3600); // print the hour (86400 equals secs per day)
Serial.print(':');
if (((epoch % 3600) / 60) < 10) {
// In the first 10 minutes of each hour, we'll want a leading '0'
Serial.print('0');
}
Serial.print((epoch % 3600) / 60); // print the minute (3600 equals secs per minute)
Serial.print(':');
if ((epoch % 60) < 10) {
// In the first 10 seconds of each minute, we'll want a leading '0'
Serial.print('0');
}
Serial.println(epoch % 60); // print the second
}
// wait ten seconds before asking for the time again
delay(10000);
Ethernet.maintain();
}

// send an NTP request to the time server at the given address
void sendNTPpacket(char* 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();
}

==Referensi==

* https://www.arduino.cc/en/Tutorial/UdpNtpClient