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OK - after some time and retries:I received the new ordered HAT.I took your Linux-Image and tried again.Changing of the i2c Adress did not work...What...

I just ordered a new one, i will inform you when the new one works... (located in Switzerland).

i2c runs great, can read my device on 0x38 without any issue, no read from pico...  fw.png

Now I startet from the beginning with your Bookworm-Image. Still not working, now I can't even read any i2c register (addresses are shown with i2cde...

Hello PiMaster Thank you so much for your great support and effort. Since i'm running an old Firmware 0x117, I tried to update - may this could be...

After Reboot i have 0x00 in this register and the addresses are still on 6x --> see image attached.  pi.png

I still don't get how to change the i2c Adress.After setting: sudo i2cset -y 1 0x6b 0x00 0x50 what to do else / is there any "store to eprom" action...

Not yet, but I try again tonight...

As soon as i have not connected the other Device (what works since years) the adresses appear and pico-status works! When I reconnect the other Devi...

Hi PiMaster Thanks for your reply. What button do you mean for FactoryReset?The second one called "UPS Pico HV4 Reset"?

That's how it looks like on the i2c...  1000035990.jpg

I decreased the now the clock as suggested, but with no effect, I still don't see Adresses 0x68 / 0x69...  1000036000.jpg

After some time then from time to time the 0x68 / 0x69 are shown with i2cdetect, but even then Pico_status has an IO-Error (attached image)... &...