>
> On Thu, Oct 29, 2009 at 2:03 AM, Mr Doug - <dsc3...@yahoo.com> wrote:
>
>> I am a little confused about how and why items appear in the chip
>> directories. As a for instance in the DS18S20 directory (10.xxxx) where does
>> trim and trim blanket come from? I do not see anything in the Maxim docs
>> about that. Now should they be set? What is the method for calibrating
>> temperature?
>>
>> For the DS2438 (26.xxxx) there are check boxes CA, EE, IAD, settings trim
>> and udate. Where is this all documented?
>>
>> There is a humidity reading and I do have the hobby boards temp/hum/solar
>> board but how does owfs make the calculation and is it trim-able. There are
>> two sensor? numbers listed HIH4000, HTM1735. The hobby board is an HIH3610.
>>
>> So without reading through the source code how does one understand all
>> this?
>>
>>
> The humidity issue is a little different. When the OWFS project started,
the only use of the DS2438 was in a humidity sensor based on the HIH3610
(this was the Dan Awbry published design) so I included it directly in the
file structure. Now we use a more sophisticated approach of including
implementation-specific properties in their own subdirectory. I didn't want
to break existing code...
Paul Alfille
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