Sadly, when I do:
i2cdetect -l
I get nothing back. Leading me to conclude that there are no busses available.
FWIW, when I do:
/sbin/hwclock -vr
I get:
hwclock from util-linux 2.36.1
System Time: 1681724077.614748
Trying to open: /dev/rtc0
Trying to open: /dev/rtc
Trying to open: /dev/misc/rtc
No usable clock interface found.
hwclock: Cannot access the Hardware Clock via any known method.
Also FWIW, when I do:
ls -l /dev/i2c*
I get:
ls: cannot access '/dev/i2c*': No such file or directory
Further confirming that there are no available busses.
Is it possible that I need to modprobe a different (or additional) module than
"i2c_bcm2835"?
Thanks!
Rick
PS: I'm still wondering if there is some kind of documentation of these
modules and what they do that would give me a bit of background for this
project.
On Mon, Apr 17, 2023, at 1:10 AM, Reco wrote:
> Hi.
>
> On Sun, Apr 16, 2023 at 06:41:53PM -0700, Rick Thomas wrote:
>> I found this in journalctl :
>> Apr 16 18:23:33 pi kernel: rtc-ds1307: probe of 1-0068 failed with error
>> -121
>> Apr 16 18:23:33 pi kernel: i2c i2c-1: new_device: Instantiated device
>> ds1307 at 0x68
>>
>> Is rtc_ds1307 the wrong module for my DS3231 rtc hardware?
>
> No, because ds1307 kernel module should work with DS3231.
> But the address of the device (0x68) on I2C bus could be different,
> or the device is actually connected to another I2C bus (i.e. - not 1st).
>
> Consider running i2cdetect to clarify things.
>
> Reco
