System Time - ESP32 | 獸醫院評價網
RTCtimer:Thistimerallowstimekeepinginvarioussleepmodes,andcanalsopersisttimekeepingacrossanyresets(withtheexceptionofpower-onresets ...
[中文][1]
OverviewESP32 uses two hardware timers for the purpose of keeping system time. System time can be kept by using either one or both of the hardware timers depending on the applications purpose and accuracy requirements for system time. The two hardware timers are:
RTC timer: This timer allows time keeping in various sleep modes, and can also persist time keeping across any resets (with the exception of power-on resets which reset the RTC timer). The frequency deviation depends on the RTC Timer Clock Sources[2] and affects the accuracy only in sleep modes, in which case the time will be measured at 6.6667 μs resolution.
High-resolution timer: This timer is not available in sleep modes and will not persist over a reset, but has...
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