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I switched over to powered mode instead of parasitic mode and it works
fine. I'm not one to just move on when there is a quirk causing an
issue and a fix is found. I'm thinking the problem is in the "hard
pull-up" on the data line, I tried increasing the time from 0.5 sec to
1.5sec with no different results. I have a task running while testing
the DS1820, it is just this:

DIM DACCounter as BYTE

DO

Call DACPIN(18, SETIOUT, DACCounter)

SLEEP(0.0)

LOOP

End Sub 'SetIOUTtask

I'm not sure if this is effecting the time it takes for the hard pull-up
to be applied to the dS1820 data pin. Maybe the extra current is not
getting to the chip before the temperature conversion starts. I stopped
the task and it didn't make a difference either.

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