04-10-2020
Hi....You can keep local time with the TimeLib.h library. This runs from the processor's clock. You use NTP time from the network to periodically "true up" your local time. See TimeNTP example in the Time library and NTPClient in the ESP8266WiFi libarary.
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1. Windows & DOS: Issues & Discussions
All,
I have a Windows XP client which I need to get time synchronized from a Linux ntp server. What are the commands to perform the setup and configuration?
Thanks,
Mike (1 Reply)
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2. Solaris
All,
How do you set a Solaris 9 server which received ntp updates from a ntp server to broadcast them on a local subnet. I have created a /etc/inet/ntp.conf file to receive the updates from a server on network and need to make this server become like a ntp relay from the main server.
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Hello All
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5. AIX
Hello everybody! When I run command "ntpdate" the following error occures
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"
# oslevel -s
5300-08-06-0918
oslevel -r
5300-08
eny suggestion friends? :-) (3 Replies)
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6. Solaris
Hi, I am trying to configure NTP client on my Solaris server, but I am getting error like:
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bash-3.00# pwd
/etc/inet
bash-3.00#
bash-3.00#
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8. Solaris
hi all
ntp client side configuration file is done but in
# ntpq -p
remote refid st t when poll reach delay offset disp
==============================================================================
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Hi,
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10. Programming
Currently have two ESP8266 modules testing some Blynk apps, whereI'm not so happy with the Blynk business model for developers, but that's another story.
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LEARN ABOUT OPENSOLARIS
ntptrace
ntptrace(1M) System Administration Commands ntptrace(1M)
NAME
ntptrace - trace a chain of NTP hosts back to their master time source
SYNOPSIS
/usr/sbin/ntptrace [-vdn] [-r retries] [-t timeout]
[server]
DESCRIPTION
ntptrace determines where a given Network Time Protocol (NTP) server gets its time from, and follows the chain of NTP servers back to
their master time source. If given no arguments, it starts with localhost.
OPTIONS
The following options are supported:
-d Turns on some debugging output.
-n Turns off the printing of host names; instead, host IP addresses are given. This may be necessary if a nameserver is down.
-r retries Sets the number of retransmission attempts for each host.
-t timeout Sets the retransmission timeout (in seconds); default = 2.
-v Prints verbose information about the NTP servers.
EXAMPLES
Example 1 Sample Output From the ntptrace Command
The following example shows the output from the ntptrace command:
% ntptrace
localhost: stratum 4, offset 0.0019529, synch distance 0.144135
server2.bozo.com: stratum 2, offset 0.0124263, synch distance 0.115784
usndh.edu: stratum 1, offset 0.0019298, synch distance 0.011993, refid 'WWVB'
On each line, the fields are (left to right):
o The server's host name
o The server's stratum
o The time offset between that server and the local host (as measured by ntptrace; this is why it is not always zero for local-
host)
o The host's synchronization distance
o The reference clock ID (only for stratum-1 servers)
All times are given in seconds. Synchronization distance is a measure of the goodness of the clock's time.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWntpu |
+-----------------------------+-----------------------------+
SEE ALSO
xntpd(1M), attributes(5)
BUGS
This program makes no attempt to improve accuracy by doing multiple samples.
SunOS 5.11 19 Mar 1998 ntptrace(1M)