Re: HA Holy Grail #1: Occupancy Detection

["David Gumbrell" <david.gumbrell@xxxxxxxxx>]

Thanks for all the suggestions folks.

Although the original thread has become disconnected, my shower
"problem" is
very minor and really a throwaway comment related to PIRs not seeing
through
glass and hence unexpected effects on presence algorithms. To recap,
occasionally I lose bathroom presence if I spend too long in the shower
because no motion is being detected on the main sensor and room presence
times out. Probably my sensor positioning could have been better, although
I'd have to double check the zones and the sensor "footprint".
But I believe
extending the timeout period based on a shower-on detection (either by my
current humidity method or hot pipe temp change) would be sufficient, and
then the normal timeout could be reset on subsequent bathroom presence loss
(since there is always going to be a re-establishment of presence when you
come out of the shower). I really ought to experiment with this.

I have to say that I hate anything battery powered with a vengence, going
mad trying to find which particular smoke alarm beeps once every five
minutes due to a low battery (what complete plank came up with 5 minutes ?)
means that I have vowed that I willl *never* install something relying on
battery power again :-)

However, I was _briefly_ teased by the idea of a toilet seat sensor ....

Cheers,

David


On 8/31/06, Craig <craigc.lists@xxxxxxx> wrote:
>
>
> >> Part P stuff makes me very careful about the installation of
> >> automation stuff in the bathroom, and I'm also trying to
avoid the
> >> ceiling getting "sensor rash". Really, I probably
put the main sensor
> >> in the wrong place, I should have mounted it further into the
room and
> >> closer to the shower surround and then there would be no
issue.
>
> > How about one of the battery powered wireless PIRs? No zone
> > issues then. Visonic do one, and there was an article on
> > here a couple of days ago talking about how to pick up
> > messages from Visonic devices.
>
> Here:
>
> http://www.automatedhome.co.uk/article1747.html
>
> Don't forget the wireless BT/visonic door sensors could also be used
to
> help
> with this, with external reed switch maybe on the shower door? They
also
> have a spare input, so you could even fit a small discrete reed switch
on
> the toilet seat, flush handle, etc :)
>
> Savastore have them for around a tenner at the moment:
>
> http://www.savastore.com/products/electronics/homesecurity/
>
> I would assume because they are battery powered & wireless, there
is no
> 'P'
> issue :)
>
>  _
>


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