• Do you notice any drift between the two RTC modules?

    Hardly none due to the "daily" GPS updates of both real time clocks.
    The DS3232 is a +- 2 PPM device which drifts ~ 0.17 seconds per day and since
    this is less than a second per day there is no way to measure it before the next sync update.
    (It has to be greater than 1 second to measure the drift or inaccuracy)


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