<![CDATA[RTC (Without battery backup)]]>In hunting down other issues, I came across several statements that the M5STACK Fire doesn't have a Real Time Clock (RTC). However, if I set the RTC with machine.RTC().dateTime(<Time tuple>), it seems to work. If I think read back with machine.RTC().dateTime(), it seems to be keeping time just fine.

So is the issue that there isn't a battery-backup, and I'll have to set it each time I wake (which is just fine), or that the software for the RTC really doesn't work?

]]>https://community.m5stack.com/topic/2004/rtc-without-battery-backupRSS for NodeMon, 16 Mar 2026 05:05:55 GMTSat, 30 May 2020 04:42:53 GMT60<![CDATA[Reply to RTC (Without battery backup) on Sun, 18 Oct 2020 12:29:57 GMT]]>Hello @toddkrein

you are correct, there is no RTC battery backup in M5Stack Fire.

Please note: In sleep modes time accuracy might be affected depending on the clock source used.

Please also refer to:
https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/system_time.html

Cheers
Felix

]]>https://community.m5stack.com/post/10383https://community.m5stack.com/post/10383Sun, 18 Oct 2020 12:29:57 GMT