Advanced NTP

This fork of the original NTP plugin for Dart offers enhanced functionality to get precise time from the Network Time Protocol (NTP).

Note: This is a fork of the original NTP package. The goal of this fork is to provide more advanced features not present in the original package.

Plugin that allows you to get precise time from Network Time Protocol (NTP). It implements whole NTP protocol in dart.

This is useful for time-based events since DateTime.now() returns the time of the device. Users sometimes change their internal clock and using DateTime.now() can give wrong result. You can just get clock offset [getNtpTime()] and apply it manually to DateTime.now() object when needed (just add offset as milliseconds duration), or you can get already formatted [DateTime] object from [now()].

By default lookup address for NTP is: time.google.com

For example on how to use look in github library repository example/ folder.

How it works

Using int offset from getNtpTime()

default localTime is DateTime.now()
default lookUpAddress is 'time.google.com'
default port is 123

  DateTime startDate = new DateTime.now().toLocal();
  int offset = await getNtpOffset(localTime: startDate);
  print('NTP DateTime offset align: ${startDate.add(new Duration(milliseconds: offset))}');

Using DateTime from now

  DateTime startDate = await now();
  print('NTP DateTime: ${startDate}');

NTP Functions

  Future<int> getNtpOffset({
    String lookUpAddress: 'time.google.com',
    int port: 123,
    DateTime localTime,
    Duration timeout,
  });

  Future<DateTime> now();

Future<NTPResponse> getNtpData({
    String lookUpAddress = _defaultLookup,
    int port = 123,
    DateTime? localTime,
    Duration? timeout,
});

elgill/advanced_ntp

Advanced NTP

How it works

NTP Functions