On 10/8/07, Mr Robert Conway <[EMAIL PROTECTED]> wrote:
>
> I thought the counter was used with the "tipping bucket" type of rain
> detector that measures rain fall for all weather station applications. I
> use it connected to a flow meter that provides 4000 pulses per litre. The
> flow meter has an LED with photo detector and I power the LED from the 1wire
> bus +VDC and the photo detetcor direct to connets to the counter inputs. I
> have the hobby version with battery backup thus never loosing data, so in my
> case I just compare the counter values before and after 1 time duration and
> work out the difference which becomes flow rate.
>
> great device and a big thanks to Paul in getting it running again
The battery backup explains the persistent counter values and the large
counts.
I now wonder about the 0x04 in the next, supposedly zero field, in your
example. Perhaps the counters actually are more than 4 bytes and this is the
high-order byte. Usually the counts wouldn't go this high before a reset, so
the field was never tested. The datasheet says nothing about higher order
fields.
Someone is kindly sending me a DS2423 counter device. I'll test this
hypothesis.
I presume we'd want the full resolution ( >32bits) reported if it exists.
Paul Alfille
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