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