# RV3028 RTC not passing time to Raspbian?

**URL:** <https://forums.pimoroni.com/t/rv3028-rtc-not-passing-time-to-raspbian/12479>\
**Category:** Support\
**Created:** [December 17, 2019, 8:45pm UTC](https://forums.pimoroni.com/t/rv3028-rtc-not-passing-time-to-raspbian/12479 "2019-12-17T20:45:48Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![alphanumeric](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/alphanumeric/32/2729_2.png) [@alphanumeric](https://forums.pimoroni.com/u/alphanumeric)\
**Post date:** [January 23, 2020, 1:21pm UTC](https://forums.pimoroni.com/t/rv3028-rtc-not-passing-time-to-raspbian/12479/12 "2020-01-23T13:21:25Z")

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I’m still having issues with that one breakout that was installed when I did the config.txt edit. I started a new thread on it. I could use some help with this Phil @gadgetoid or Sandy @sandyjmacdonald

> [@RV3028 not keeping correct time](https://forums.pimoroni.com/t/rv3028-not-keeping-correct-time/12836):
>
> It looks like I may have a bad RV3028. It was working fine as near as I can tell but is now unreliable after doing a config txt edit dtoverlay=i2c-rtc,rv3028,backup-switchover-mode=1. [https://forums.pimoroni.com/t/rv3028-rtc-not-passing-time-to-raspbian/12479](https://forums.pimoroni.com/t/rv3028-rtc-not-passing-time-to-raspbian/12479) It now craps out if left for any amount of time. I booted up that Pi yesterday and the time was off. And running sudo hwclock -r gets me that error message. hwclock: ioctl(RTC\_RD\_TIME) to .dev/rtc0 to read time failed: invalid argument …

EDIT: It appears to be a dud battery. It tests in the red on my battery tester set for 1.5V coin cells. I’ll have to have a look for one at a pharmacy etc.

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