3 ms·
That's what I get for not reading the datasheet more carefully, I guess. Thanks, I'll switch to that, I have a bunch of bare modules.
by StavrosK 6y ago
That's what I get for not reading the datasheet more carefully, I guess. Thanks, I'll switch to that, I have a bunch of bare modules.
- tyingq 6y agoIt's +- 5% on accuracy, so not the best RTC, but it's fairly simple to give the internal RTC a better oscillator: https://user-images.githubusercontent.com/2858309/73125119-71fc6c80-3f60-11ea-879e-9a5b5f027982.JPG https://user-images.githubusercontent.com/2858309/73125119-7... Supposedly that makes it as good as typical cheap RTC modules. Or, maybe +-5% is fine with just a few NTP updates now and again. Edit: Apparently the built-in accuracy is substantially better if you avoid the deep sleep mode.
- StavrosK 6y agoYeah, since I need to be getting weather updates I'll definitely be using NTP. 5% is pretty bad, though, that's more than an hour off a day. I guess it's not bad for short durations, and I'm assuming it mainly uses it so it can wake from deep sleep states, which is extremely useful. Thanks for the schematic, that's great to know!