>> This is using the 3v3 from the RPi, I've not got the required parts to do 
>> level conversion but I have a level convertor on order.
> 
> This means, that 1-wire bus is powered by 3.3V, which can slow down
> communication on long lines.

Sure at the moment it's still very much for testing, I've got a DS2483 which I 
can drive with 5v and still use 3v3 for the i2c, testing that later today.

> Now time difference is not so high. For sure if you convert to 5 volt
> the difference will be negligible.

We'll see when I've got convertors available :)
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