How to read time in RTC?

ARGON EON DISCUSSION
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1

How do you read the time on the rtc? I feel like there’s something wrong with it and it keeps setting the time and date to 2009 october.

2

You will need to open the configuration tools in the Terminal by typing:

argon-config

Choose the update RTC option. Make sure your are connected to the internet.

Then REBOOT to save the settings.

3

I’ve done that before. But, if you unplug it (and since I’m waiting to get an RTC battery) that clock dies and gets reset. It’s just annoying, because sometimes even if I set it, it still somehow gets reset to 2009 even if I didn’t unplug it.

4

Sorry about that. The RTC will need a battery if the unit is unplugged to keep its settings.

5

Depending on your O/S the Pi could also be using the fake hw-clock which may/may not be required with a RTC. (in another project i was working on i had to remove it) Still awaiting mine but will confirm this. (search google remove fake-hwclock)

Drew

6

Oh okay noted. I guess it should be mentioned that the RTC clock does not function correctly until you place a battery. May also act weird until you place a battery. I guess I’ll just wait until I get the battery.

7

Does anyone know what battery this RTC takes?

8

The battery is CR 1220

9

So here is an update even with a battery it picks up the wrong time. Not only on reboot but just sitting idle. Mine keeps changing to a 2021 date very odd behavior. I went into raspi-config and verified the right timezone but when I do the RTC update it does not work. Again I do have a CR1220 battery installed.

10

You can get the RTC time be set correctly by doing this on the raspbian:

  1. install argon-config (sudo curl https://download.argon40.com/argoneon.sh | sudo bash)
  2. run sudo timedatectl set-ntp 0
  3. run sudo timedatectl set-time "YYYY-MM-DD hh:mm:ss"
  4. sudo nano /etc/systemd/timesyncd.conf and then uncomment NTP= and add your ntp servers (pool.ntp.org 0.pool.ntp.org 1.pool.ntp.org) and then save CTRL+X
  5. run timedatectl set-ntp 1
  6. run argon-config select to 3 for RTC clock, and the select 1 to sync system time TO the rtc clock.

Optional, set your timezone: sudo timedatectl set-timezone "America\Toronto" (change it your timezone, use timedatectl list-timezones if you want to see a list)

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11

Thanks for your step by step it was a great help setting the correct time for my RTC

12

When I issue this command
sudo timedatectl set-time YYYY-MM-DD hh:mm:ss
system responds “Too many arguments.”

13

Actually, my bad… Needs to put the date and time in quotes… like above

14

I get the error: Failed to parse time specification “YYY-MM-DD hh:mm:ss” using your suggested input

15

Maybe a single quote/apostrophe maybe? instead of a double quote

17

In case anyone still is wondering about this- you need to put the actual datetime in the format of “YYY-MM-DD hh:mm:ss” not that string exactly.
So, for today, the command should be: sudo timedatectl set-time “2022-07-22 02:52:10”

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