Onnowpurbo: /* Code */

2018-05-28T11:39:40Z

Code

Onnowpurbo at 11:36, 28 May 2018

2018-05-28T11:36:29Z

← Older revision		Revision as of 11:36, 28 May 2018
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	Sumber: http://forum.arduino.cc/index.php?topic=58915.0		Sumber: http://forum.arduino.cc/index.php?topic=58915.0

			==Code==

	#include <Time.h>		#include <Time.h>

Onnowpurbo: Created page with "Sumber: http://forum.arduino.cc/index.php?topic=58915.0 #include #include #include #include byte mac[] = { 0xDE, 0xAD, 0xBE, 0xE..."

2016-10-06T07:44:46Z

Created page with "Sumber: http://forum.arduino.cc/index.php?topic=58915.0 #include <Time.h> #include <SPI.h> #include <Ethernet.h> #include <Udp.h> byte mac[] = { 0xDE, 0xAD, 0xBE, 0xE..."

New page

Sumber: http://forum.arduino.cc/index.php?topic=58915.0

#include <Time.h>
#include <SPI.h>
#include <Ethernet.h>
#include <Udp.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 192, 168, 1, 44 }; // set the IP address to an unused address on your network

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

byte timeServer[] = { 192, 43, 244, 18}; // time.nist.gov

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

time_t prevDisplay = 0; // when the digital clock was displayed

void digitalClockDisplay();
void printDigits(int digits);

unsigned long getNtpTime();
unsigned long sendNTPpacket(byte *address);

void setup()
{
// start Ethernet and UDP
Ethernet.begin(mac,ip);
Udp.begin(localPort);
Serial.begin(9600);
Serial.println("waiting for sync");

setSyncInterval(15); // sync every 15 seconds
setSyncProvider(getNtpTime);

while(timeStatus()== timeNotSet)
; // wait until the time is set by the sync provider

Serial.println("Sync successfully");
}

void loop()
{

if( now() != prevDisplay) //update the display only if the time has changed
{
prevDisplay = now();
digitalClockDisplay();
}
}

void digitalClockDisplay(){
// digital clock display of the time
Serial.print(hour());
printDigits(minute());
printDigits(second());
Serial.print(" ");
Serial.print(year());
Serial.print("-");
Serial.print(month());
Serial.print("-");
Serial.print(day());
Serial.println();
}

void printDigits(int digits){
// utility function for digital clock display: prints preceding colon and leading 0
Serial.print(":");
if(digits < 10)
Serial.print('0');
Serial.print(digits);
}

/*-------- NTP code ----------*/

unsigned long getNtpTime()
{
Serial.println("Sending time sync request to NTP server.");
sendNTPpacket(timeServer); // send an NTP packet to a time server

unsigned long startMillis = millis();
int tryCounter = 1;
while( millis() - startMillis < 1000) // wait up to one second for the response
{ // wait to see if a reply is available
if ( Udp.available() )
{
Udp.readPacket(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, esxtract 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;
// now convert NTP time into Arduino Time format:
// Time starts on Jan 1 1970. In seconds, that's 2208988800:
const unsigned long seventyYears = 2208988800UL;
// subtract seventy years:
unsigned long epoch = secsSince1900 - seventyYears;

Serial.println("Time sync successfully.");

return epoch;
}

Serial.print("No date data available. Try counter: .");
Serial.println(tryCounter++);
delay(100);
}

Serial.println("Time sync failed.");

return 0; // return 0 if unable to get the time
}

// send an NTP request to the time server at the given address
unsigned long sendNTPpacket(byte *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.sendPacket( packetBuffer,NTP_PACKET_SIZE, address, 123); //NTP requests are to port 123
}

==Referensi==

* http://forum.arduino.cc/index.php?topic=58915.0

Arduino: Ethernet NTP dapatkan waktu - Revision history

Onnowpurbo: /* Code */

Onnowpurbo at 11:36, 28 May 2018

Onnowpurbo: Created page with "Sumber: http://forum.arduino.cc/index.php?topic=58915.0 #include #include #include #include byte mac[] = { 0xDE, 0xAD, 0xBE, 0xE..."