Keep in mind that any home-grown solution would have to take several important steps to actually literally synchronize the clocks which the NTP and SNTP attempt to make amends with. "Lag" is a general term, but even in the case where the user doesn't "experience" lag, there is still some definitive amount of time for which the packets must travel through which is accessible through the TLI. Also, setting the clock after reading data takes some amount of time (hopefully less than a second!). It would be more beneficial if you learn how this is done and done correctly reading through a module source or program source (even in C) since this topic has been beaten into the ground.

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