Micro Innovations M000174-19 manual Sntp Client

Programs Windows CE

7.10SNTP CLIENT

Under Windows CE 5.0 the device contains a Simple Network Time Protocol (SNTP) client. The SNTP implementation is derived from the Network Time Protocol (NTP). SNTP synchronizes the system time on a device with that of an SNTP server. This in turn receives its time from a reference source.

Note:

Further information on the functionality of the SNTP client is provided in the Microsoft MSDN documentation.

7.10.1GENERAL SETTINGS

The following registry settings control the functionality of the SNTP client (refer also to chapter Registry Editor).

Note:

Changes to the registry entries are not active until the next restart of the SNTP client. The dword entries are in hexadecimal format (see also chapter Sample settings).

Basic registry entries under [HKEY_LOCAL_MACHINE\Services\Timesvc]:

Entry	Type		Description
Server	string	/	Specifies the domain name of an SNTP server. If only a name is
	multi_strin		specified, this value is a string. If a list of servers is specified, the
	g		value is a multi-string.
			Public time servers:
			swisstime.ethz.ch	- IP 129.132.2.22	ETH Zürich
			thrad.cybernet.ch	- IP 212.90.197.226	Swisscom
			pool.ntp.org	- IP 212.101.3.211	Int. NTP Server Project
Refresh	dword		Specifies the duration in milliseconds between the synchronizations
			with the SNTP server.
			Caution: Minimum value for refresh: 5*60*1000ms
RecoveryRefresh	dword		Specifies the time in milliseconds until the next synchronization if the
			previous attempt failed.
			Caution: The specified time for this code must be less than or equal
			to the specified time for the refresh code.
			Caution: Minimum value for RecoveryRefresh: 5*60*1000ms
Threshold	dword		Specifies the time in milliseconds between the time on the SNTP
			server and the current time on the device. If the difference between
			the time on the SNTP server and the current time on the device is
			greater, the time synchronization is interrupted.
AutoUpdate	dword		If this value is set to one (1), the SNTP client is activated if a server
			was defined.
ServerRole	dword		Always set to zero (0). SNTP server is not supported!

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