Chatgpt saved my day, it seems that the usb disk was interfering the
i2c signals on the bus by air..., yes i use pull up's of the i2c bus
with 2K2. The bus has short wires of about 10cm to a external pcb with
the ds2482 devices.
When i placed the usb disk outside the metal casing the problem was
gone.. The usb disk has plastic casing at one side.
Maybe usefull for someone also?
On 9/12/25 8:28 AM, Nico Bouthoorn via Owfs-developers wrote:
Hi all,
I’ve just lost a couple of days troubleshooting this…
I’ve been using a BeagleBone Black with a DS2482-800 for years without
any issues to control my greenhouse. Recently, I decided to upgrade
and switched to three DS2482-800s on a Raspberry Pi. At first,
everything seemed fine—the devices and sensors were detected. However,
from time to time, the DS2482-800 and the connected devices would
disappear.
After some digging, I found the cause: I had also connected a SATA/USB
disk to the Raspberry Pi for storage. Somehow, the disk interferes
with the I²C interface. When running |i2cdetect -y -r 1|, the I²C
addresses occasionally disappear.
Has anyone experienced something similar? It doesn’t seem to be a
1-Wire issue, but rather a Raspberry Pi flaw.
Thanks,
Nico
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