Hello,
I am trying to setup the RTC with a CR1225 battery following the instructions in the forum (just soldering the bracket and inserting the cell coin), but the RTC resets every time I power off the board.
I checked the voltage between the (+) in the battery and GND in the board and it is 3.3V, so I assume the battery holder is correctly soldered to the board and the battery should provide the necessary voltage.
After updating the clock with the Internet connection I get the following output from timedatectl:
Local time: mar 2020-06-23 15:52:55 CEST
Universal time: mar 2020-06-23 13:52:55 UTC
RTC time: mar 2020-06-23 13:52:55
Time zone: Europe/Madrid (CEST, +0200)
System clock synchronized: yes
systemd-timesyncd.service active: yes
RTC in local TZ: no
I think it is OK, but when I shutdown the system, wait for 5 minutes (current time is 15:58:00) and boot without Internet connection, I get the following output from timedatectl:
Local time: mar 2020-06-23 15:54:07 CEST
Universal time: mar 2020-06-23 13:54:07 UTC
RTC time: sáb 2000-01-01 01:01:19
Time zone: Europe/Madrid (CEST, +0200)
System clock synchronized: no
systemd-timesyncd.service active: yes
RTC in local TZ: no
As you can realize, RTC time resets to year 2000.
I think all instructions in the forum refer to Jetson Nano Developer Kit 945-13450-0000-000, but in my case I have two 945-13450-0000-100 boards. I tried both boards and the same thing happens. I don’t know if the Developer Kit version makes the difference.
What do you think? Has anyone succeed to properly setup RTC in Jetson Nano Developer Kit 945-13450-0000-100. Thanks in advance.
System description:
Jetson Nano Developer Kit 945-13450-0000-100
L4T 32.3.1. Ubuntu 18.04