Onnowpurbo at 09:48, 30 May 2018

2018-05-30T09:48:58Z

Onnowpurbo: Created page with "// time ntp RTC DS1302 set #include #include #include #include #include // Init the DS1302 // DS1302 rtc([CE/RST], [..."

2018-05-30T09:47:15Z

Created page with "// time ntp RTC DS1302 set #include <Time.h> #include <SPI.h> #include <Ethernet.h> #include <EthernetUdp.h> #include <DS1302.h> // Init the DS1302 // DS1302 rtc([CE/RST], [..."

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// time ntp RTC DS1302 set

#include <Time.h>
#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h>
#include <DS1302.h>

// Init the DS1302
// DS1302 rtc([CE/RST], [I/O], [CLOCK]);
DS1302 rtc(8, 7, 6);

// Ethernet library configuration
byte mac[] = { 0x24, 0x7B, 0xA2, 0x4A, 0x52, 0x10 };
IPAddress timeServer(128, 138, 140, 44 ); // time.nist.gov

unsigned int localPort = 8888;
const int NTP_PACKET_SIZE= 48;
byte packetBuffer[NTP_PACKET_SIZE];
EthernetUDP Udp;

void setup() {
// Set the clock to run-mode, and disable the write protection
rtc.halt(false);
rtc.writeProtect(false);

// Setup Communication
Serial.begin(9600);
Ethernet.begin(mac);
Udp.begin(localPort);

Serial.print("get time");
setSyncInterval(10); // Set seconds between re-sync
getNtpTime;

// The following lines can be commented out to use the values already stored in the DS1302
rtc.setDOW(WEDNESDAY); // Set Day-of-Week to MONDAY
// rtc.setTime(13, 0, 0); // Set the time to 12:00:00 (24hr format)
rtc.setDate(30, 5, 2018); // Set the date to Feb 2, 2016
}

void loop() {
setSyncProvider(getNtpTime);

rtc.setTime(hour()+7, minute(), second());

// Send Day-of-Week
Serial.print(rtc.getDOWStr());
Serial.print(" ");

// Send date
Serial.print(rtc.getDateStr());
Serial.print(" -- ");

// Send time
Serial.println(rtc.getTimeStr());

getNtpTime;
// delay(1000);
}

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

unsigned long getNtpTime()
{
sendNTPpacket(timeServer); // send an NTP packet to a time server
delay(500);

if ( Udp.parsePacket() ) {
Udp.read(packetBuffer,NTP_PACKET_SIZE);
unsigned long hi = word(packetBuffer[40], packetBuffer[41]);
unsigned long low = word(packetBuffer[42], packetBuffer[43]);
unsigned long secsSince1900 = hi << 16 | low;
const unsigned long seventyYears = 2208988800UL;
unsigned long epoch = secsSince1900 - seventyYears;
return epoch;
}
return 0; // return 0 if unable to get the time
}

unsigned long sendNTPpacket(IPAddress& address)
{
memset(packetBuffer, 0, NTP_PACKET_SIZE); // set all bytes in the buffer to 0

// Initialize values needed to form NTP request
packetBuffer[0] = B11100011; // LI, Version, Mode
packetBuffer[1] = 0; // Stratum
packetBuffer[2] = 6; // Max Interval between messages in seconds
packetBuffer[3] = 0xEC; // Clock Precision
// bytes 4 - 11 are for Root Delay and Dispersion and were set to 0 by memset
packetBuffer[12] = 49; // four-byte reference ID identifying
packetBuffer[13] = 0x4E;
packetBuffer[14] = 49;
packetBuffer[15] = 52;

// send the packet requesting a timestamp:
Udp.beginPacket(address, 123); //NTP requests are to port 123
Udp.write(packetBuffer,NTP_PACKET_SIZE);
Udp.endPacket();
}

Arduino: RTC DS1302 NTP Sync - Revision history

Onnowpurbo at 09:48, 30 May 2018

Onnowpurbo: Created page with "// time ntp RTC DS1302 set #include #include #include #include #include // Init the DS1302 // DS1302 rtc([CE/RST], [..."