RTC?

[jeremy]

Looking at the latest kickstarter post, it mentions that it adds support for time functions and changes thing in the RTC domain. Does the ESP32 have an RTC in it? With a calendar? The data sheets are vague on this area, and only mention "RTC" SRAM and "RTC" clock sources. Or does the lopy have an external RTC IC on board?

[jeremy]

After looking at the ESP-idf files, RTC may confusingly be an acronym for "real time coprocessor". If this is true, how does the lopy keep time?