RTC

[DroZDi]

1. Install battery
2. Set timezone

# timedatectl set-timezone Europe/Warsaw

3. Set time

# date -s "2025-05-20"
# date -s "21:54:30"

4. RTC before:

RTC1.jpg (26.89 KiB) Viewed 310 times

5. Install util-linux-extra

# apt install util-linux-extra
or download: http://ftp.de.debian.org/debian/pool/ma ... _arm64.deb
and install dpkg -i

6. RTC manipulation

# hwclock --set --date "2025-05-20 22:15:00"
# hwclock --hctosys (Sync OS Time with RTC)
# hwclock --systohc (Sync RTC Time with OS)

7. Set synchronization from RTC

# timedatectl set-ntp off

Add in /etc/rc.local:

# Synchronise System clock to hardware RTC
/sbin/hwclock --hctosys --localtime --noadjfile

8. RTC after

RTC3.jpg (27.78 KiB) Viewed 243 times

9. Overview image

Zero2.jpg (50.36 KiB) Viewed 310 times