Stratum 2
If checked, the module acts as an NTP server. The time zone must be GMT0. In the Setup/Communication menu,
the UDP INCOMING PORT value is 123. If this function is used, the module cannot receive anything on the UDP channel.
UDP sending still works.
The use of an external RTC module DS3231 is recommended, with an accuracy of +-1 minute per year. The following command, written in the Windows command prompt with the module's IP address,
tests the NTP server: w32tm /stripchart /samples:10 /computer:192.168.0.88