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Is there an internal RTC on nanopi neo air ?

Moderators: chensy, FATechsupport

Hello,

I observed that my nanopi neo air date and time is always up-to-date. There is no NTP on my system and I cannot see any RTC in hardware specs found on the web (except that friendlyarm sold an external RTC module for i2c).

In dmesg of linux 4.11.2:

Code: Select all

[    2.019415] sun6i-rtc 1f00000.rtc: rtc core: registered rtc-sun6i as rtc0
[    2.030259] sun6i-rtc 1f00000.rtc: RTC enabled
...
[    2.901481] sun6i-rtc 1f00000.rtc: setting system clock to 1970-01-01 00:00:15 UTC (15)

I can't find a battery on the PCB, I may have missed something. Could someone confirm ?

Regards.
auto3000 wrote:
Hello,

I observed that my nanopi neo air date and time is always up-to-date. There is no NTP on my system and I cannot see any RTC in hardware specs found on the web (except that friendlyarm sold an external RTC module for i2c).

In dmesg of linux 4.11.2:

Code: Select all

[    2.019415] sun6i-rtc 1f00000.rtc: rtc core: registered rtc-sun6i as rtc0
[    2.030259] sun6i-rtc 1f00000.rtc: RTC enabled
...
[    2.901481] sun6i-rtc 1f00000.rtc: setting system clock to 1970-01-01 00:00:15 UTC (15)

I can't find a battery on the PCB, I may have missed something. Could someone confirm ?

Regards.



Hi.
There is a RTC , in /dev/rtc0 , but not initialized and seems to works with 40KHz oscillator approximately!
it`s amazing that friendly arm does not apply the internal RTC and assume that IOT means every time connected
to the internet!

the kernel time is updated by timedatectl . you can disable it and install ntp.

regards.
Thanks for the info.

The date and time is always correct on my nanopi neo air, consequently I'm figuring the hw setup is correct.

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