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Before going on, please check if you have original DS18B20 sensors. I had some counterfeits with the strangest behaviour. Same vanished after some time. Sometimes after a few minutes, sometimes after a few hours, whereas other counterfeits connected at the same time at the same one-wire bus still worked. I see that you have the waterproof DS18B20. I've never ...


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In my case, I had to change the interface speed from the default 4 MHz to 65kHz and then it worked!


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The Pi's logic (GPIO) outputs are 3V3. You will not be able to drive the DM860T directly from the Pi's GPIO as the DM860T needs a minimum logic level of 4V. To use the Pi with the DM860T you would need to add additional components to the Pi, e.g. transistors.


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