That's great news! The temperature of the chip will affect the RTC speed a little, but that's still a really promising improvement. I'd be interested to see what others think but that sounds like it would be a good thing to merge into normal Espruino. I'll file an issue for it.
There is some potential for working out that value automatically as well - it wouldn't be perfect, but would improve the accuracy a lot from what you were seeing at the start!
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
That's great news! The temperature of the chip will affect the RTC speed a little, but that's still a really promising improvement. I'd be interested to see what others think but that sounds like it would be a good thing to merge into normal Espruino. I'll file an issue for it.
There is some potential for working out that value automatically as well - it wouldn't be perfect, but would improve the accuracy a lot from what you were seeing at the start!