machine.RTC() Accuracy

All ESP32 boards running MicroPython.
Target audience: MicroPython users with an ESP32 board.
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davef
Posts: 811
Joined: Thu Apr 30, 2020 1:03 am
Location: Christchurch, NZ

machine.RTC() Accuracy

Post by davef » Mon Sep 27, 2021 2:16 am

I have done quite a bit of reading but can't find a definitive statement for expected RTC accuracy. I have seen comments about 1 second/day but then suggestions like external 32KHz xtal are dropped-in as well.

On the ESP8266 I used a virtual timer, running off the system clock to get reasonable accuracy for my application.

If machine.RTC() is relatively poor for the ESP32 is there any point to trying to run a virtual timer off the system clock?

Thanks,
Dave

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