I'm sure this is the solution to implement.
I know almost zero about electronics but am always looking for fun things
to do with 1wire and Raspberry.
Thanks again,
Peter
On Sun, Jul 7, 2013 at 5:34 PM, Jerry Scharf wrote:
> Peter,
>
> KISS says use a multimeter, I started with the 1-wire solu
Thank you. I'll make your suggested changes, except it's not clear what I
should do about your third item.
I also submitted OWFS 2.9p1 to FOSSology for automated license review:
https://fossology.ist.unomaha.edu/?mod=browse&upload=167&item=460688
I'm not sure what to make of all the details.
Pau
Peter,
KISS says use a multimeter, I started with the 1-wire solution because
that was the thread. This will work fine but I have to admit the sugar
cube seems even nicer. Again, measuring with a multimeter is all it takes.
They make wire that is specifically designed to prevent water ingress
How would I probe? The compartments are sealed. Whatever solution I finally
adopt there will be at least two wires from each bilge compartment leading
to the areas above the floor (deck). The wires will be sealed so that they
don't provide a passage for water.
If anyone is interested, here is our
You found an error, but I think the fix is a few lines up in the
"copy_buffer" routine, where a zero-length string should be a valid return.
Applied. Thanks Jan.
On Sun, Jul 7, 2013 at 4:05 PM, Jan Kandziora wrote:
> Hello,
>
> I found ascii properties like /simultaneous/single and $chip/alias
On 7 July 2013 22:03, Rob Kapteyn wrote:
> My reliable low-tech solution to this has been to use a microswitch with a
> rubber band around it, held open by a sugar cube.
> It is best to use the normally closed contacts.
> When there is enough water to dissolve the sugar cube, the lever moves in
>
My reliable low-tech solution to this has been to use a microswitch with a
rubber band around it, held open by a sugar cube.
It is best to use the normally closed contacts.
When there is enough water to dissolve the sugar cube, the lever moves in
and opens the contacts.
This might also be useful as
Just one note: pay attention to the insulation on the wire. Using general
pvc insulated wire will cause a leak itself. Best would be to embed some
stainless bolts, and connect wires to them using nuts and washers on the
exterior side.
Vajk
On Sun, Jul 7, 2013 at 9:18 PM, Jerry Scharf wrote:
>
>> Elegant solution. Would I need a computer? Could I just do it with a
>> multimeter?
Yes indeed. If it was me, I would solder a two-conductor cable onto two nails
and drive them, say, an inch apart somewhere in the bottom of the compartment,
and run the cable back to some place where I could
On 7 July 2013 21:05, Peter Hollenbeck wrote:
> Elegant solution. Would I need a computer? Could I just do it with a
> multimeter? I love my Raspberry Pis but maybe one isn't required in this
> case.
Would you be better just with a cheap moisture meter [eg 1] and probe
it from the outside occasio
Elegant solution. Would I need a computer? Could I just do it with a
multimeter? I love my Raspberry Pis but maybe one isn't required in this
case.
"If I understand the job right, doesn't that mean that you will be doing major
surgery to dry the compartment and solve the water ingress issues?"
Abs
Hello,
I found ascii properties like /simultaneous/single and $chip/alias
return -EINVAL when the string result is . I don't think this is
a useful behaviour as catching this error just for the "empty string"
case obscures real error cases happening in the layers below.
*This problem is only visi
It wouldn't matter if salt water destroyed a moisture sensor. I would take
occasional readings of the 7 compartments. Any reading other than
"completely dry" would mean I would have to cut an inspection hole in that
compartment and address the problem.
Thanks again,
Peter
On Sun, Jul 7, 2013 at
On 07/06/2013 08:40 AM, Peter Hollenbeck wrote:
> I am building a 26 foot wood power boat. The bilge below the cabin and
> afterdeck floor is 7 sealed water tight (hopefully) compartments. I
> plan no inspection ports but would like a way to detect moisture. If
> there were an appropriate sensor
On Sun, Jul 07, 2013 at 04:21:17PM +0200, Jan Kandziora wrote:
> Another possible method working with both water and non-polar liquids is
> checking the dielectrical permittivity, same method as a capacitive
> touchscreen uses. There are really cheap ICs for that purpose out there,
> but they all
Am 07.07.2013 17:24, schrieb Peter Hollenbeck:
> Could I use leaf wetness sensors such as this:
> http://www.hobby-boards.com/store/products/Leaf-Wetness-Sensor.html
>
Should work for a while, at least as long the bilge is dry. Once
seawater gets in contact with the board I think it has to be repla
Am 07.07.2013 17:00, schrieb Peter Hollenbeck:
> I like the idea of using cheap ICs. Can you suggest one for me to consider?
>
For your application, I cannot recommend any.
Kind regards
Jan
--
This SF.net emai
Could I use leaf wetness sensors such as this:
http://www.hobby-boards.com/store/products/Leaf-Wetness-Sensor.html
?
Peter
On Sun, Jul 7, 2013 at 8:00 AM, Peter Hollenbeck wrote:
> I like the idea of using cheap ICs. Can you suggest one for me to consider?
> Thank you,
> Peter
>
>
> On Sun, Jul
I like the idea of using cheap ICs. Can you suggest one for me to consider?
Thank you,
Peter
On Sun, Jul 7, 2013 at 7:21 AM, Jan Kandziora wrote:
> Am 07.07.2013 15:49, schrieb Peter Hollenbeck:
> > I don't really understand why that works,
> >
> Usually, there is air between the heater and hea
Am 07.07.2013 15:49, schrieb Peter Hollenbeck:
> I don't really understand why that works,
>
Usually, there is air between the heater and heat sensor. This will heat
the sensor, but only marginally as
* heat conduction through air is nearly always insignificant
* heat convection through air is ins
why not one of those ?!?
http://www.fuchs-shop.com/download/MultiSensor_Manual_V091028.pdf
this page is from germany but you should be able to get these anywhere else ...
regards,
marcus
Peter Hollenbeck schrieb:
>I don't really understand why that works, but I could certainly do it.
>Thank
I don't really understand why that works, but I could certainly do it.
Thanks for the suggestion.
Peter
On Sun, Jul 7, 2013 at 5:01 AM, Jan Kandziora wrote:
> Am 07.07.2013 02:13, schrieb Peter Hollenbeck:
> > Stuart Island, British Columbia
> >
> > Interesting idea.
> > Ocean water temperature
If we build it right the bilge should be bone dry so I guess I would want
to detect moisture.
Peter
On Sun, Jul 7, 2013 at 12:11 AM, Colin Law wrote:
> On 7 July 2013 01:13, Peter Hollenbeck wrote:
> > Stuart Island, British Columbia
> >
> > Interesting idea.
> > Ocean water temperature here i
Am 07.07.2013 02:13, schrieb Peter Hollenbeck:
> Stuart Island, British Columbia
>
> Interesting idea.
> Ocean water temperature here is about 10C and air temperature, when we are
> here April through October, ranges from about 10 to 20. I will have to
> experiment to see if the differential would
On 7 July 2013 01:13, Peter Hollenbeck wrote:
> Stuart Island, British Columbia
>
> Interesting idea.
> Ocean water temperature here is about 10C and air temperature, when we are
> here April through October, ranges from about 10 to 20. I will have to
> experiment to see if the differential would
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