Setting the time on an esp32

[saltydog101]

I've worked with the ESP8266, and there I would set the time on bootup via ntp. I was able to call the RTC class from machine and also, use utime.localtime to help calculate the delta. Then I would call RTC().datetime to set the time accordingly. In the ESP32 port, there is neither an RTC class or a localtime function from utime, I'd be glad to look at adding it, but I wanted to make sure I'm not duplicating the same functionality elsewhere. Is someone already working on something similar?

[dpgeorge]

I wanted to make sure I'm not duplicating the same functionality elsewhere. Is someone already working on something similar?

Not to my knowledge, so feel free to go for it.

[mcauser]

Some work on machine.RTC here: https://github.com/micropython/micropython-esp32/pull/85

[saltydog101]

Thanks mcauser! I'll just add the localtime method to utime to complete setting the time.

[nickzoic]

Cool, I should add a call to machine.RTC().init() to mpy-utils as well ...

[MrSurly]

Actually, I did implement datetime() in https://github.com/micropython/micropython-esp32/pull/85

Though, I need to update it to make a bit more sense, since I screwed up the year / month thing (1900 and 0-11) Edit 1: Fixed, pushed, matches implementation from the documentation.

Edit 2: Also, implemented using subseconds (255-0) instead of µseconds ... probably not the right thing to do for machine.RTC (as opposed to pyb.RTC)

Edit 3: Implemented RTC().init(()), and replaced subseconds with microseconds

[vandys]

Has anybody wired in the SNTP code form the SDK? Seems like it'd be a nice fit.

[saltydog101]

Thanks @MrSurly, that's what I needed to set the time from ntp.