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EDIT: This problem is solved! the problem was a script running on the pi, which occupied the SCL pin (in my case a script listening for a shutdown button). So it was not able to read the rtc.

I'm currently following this tutorial to connect my Raspberry Pi Zero W running Jessie Lite to the RTC DS1307. The rtc is being recognized when running sudo i2cdetect -y 1 with "UU", so everything fine until this point. But when entering sudo hwclock -D -r I'm getting an error:

Error Message

Does anybody have any experience or hints with this error? I was researching for 1 1/2 day now, but could not find a working solution. Any help is appreciated.

Moritz
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1 Answers1

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Back then I was not able to answer my own question. I have already edited the main post, but to close this question:

This problem is solved! the problem was a script running on the pi, which occupied the SCL pin (in my case a script listening for a shutdown button). So it was not able to read the rtc.

Moritz
  • 352
  • 1
  • 3
  • 15