(I accidentally sent this from the wrong address the first time, and now I'm
re-sending it from the address that's actually subscribed to this list. My
apologies if it ends up going out to the list twice anyway.)
Hi Paul,
I've taken another look at it and it seems like the write actually is
worki
Hi Paul,
I've taken another look at it and it seems like the write actually is
working. Before, I had an Arduino sketch loaded that was also poking at the
DS2404. Now, with a different sketch that doesn't touch the DS2404, writing
via owfs seems to work.
The reading is still not quite right... a
>
>The design depends on there being a difference between the air temperature
>and the water temperature, which may or may not be the case in general. If
>there is any risk of them being at the same temperature you could address
>the problem by attaching a heater resistor to each sensor. Then t
Perhaps the self-heating of two sucessive reads?
On Wed, Sep 24, 2008 at 6:17 PM, Doug Collinge <[EMAIL PROTECTED]>wrote:
> The design depends on there being a difference between the air temperature
> and the water temperature, which may or may not be the case in general. If
> there is any risk
The design depends on there being a difference between the air temperature
and the water temperature, which may or may not be the case in general. If
there is any risk of them being at the same temperature you could address
the problem by attaching a heater resistor to each sensor. Then the water
The DS2404 has never really been tested. I'll work with you to see if we can
make it work.
As for accessing just parts of memory, it's not really possible via the
shell. The underlying libow API supports writes (and reads) with offsets and
a length. owcapi supports this. owperl supports this.
Pau
Hi,
I've got a few DS2404 chips and I'm playing around with them and an
Arduino. I've got the Arduino connected to the 3-wire port and my laptop
connected via a USB dongle to the 1-wire port. The DS2404 is getting +5V
and ground from the Arduino board. My laptop is running Gentoo with owfs
2.7-
I'm doing something to monitor lake temperatures that I am currently working on.
For your application, it is a good design. There shouldn't be much difference
in
your water temperatures at different water levels. Any lighting could affect
your air
temperatures, but might actually "help" your ap
