Hi Team,
We are facing an issue with the Pimoroni RTC module on Raspberry Pi 4 and 5.
When we sync the time using:
sudo hwclock -w
and read the time using:
sudo hwclock -r
The time is shown correctly. However, after performing a hard reboot and leaving the Raspberry Pi powered off for around 10 minutes, the time is not synced, and we see the error shown in the attached log/screenshot.
Could you please check and advise us on how to resolve this issue?
Regards
Sakthinathan S
Are you using the RV3028 with a backup coincell battery? And did you follow the instructions and ran rv3028-python/examples/set-time.py at master · pimoroni/rv3028-python · GitHub once?
Hi,
We are expecting the RTC to automatically sync the system time during reboot so that, even without internet access, the correct time is restored after a reboot.
I have already added the dtoverlay for the RTC in the config.txt file. After running:
sudo hwclock -w
I can sync the time and read it back without any errors. However, this does not work after a reboot. Once the system restarts, it again fails to read the time from the RTC and shows the error logs (screenshot attached).
If I manually write the time again using hwclock -w, then I can read and sync it correctly — but the issue is that it doesn’t happen automatically on boot.
Problem: I need the system clock to sync with the RTC automatically on boot.
Any guidance on how to fix this would be greatly appreciated.
Pointing you back to my first reply: have you executed the script that I linked to? The docs say it has to be executed at least once. If you look at it, you will see it configures switchover which you need for your use-case.