Re: Light level monitoring - to add to Homevision/Comfort

[Kevin Hawkins <yahoogroupskh@xxxxxxxxxxxxxx>]

.. and can you get the light 'level' onto a C-Bus lighting group , if
so
you can use that with the C-Bus gateway and HV?

(Not sure if the external PIR has this capability)

K

On 31/05/2012 10:46, Paul Gordon wrote:
> Going to share?
>
> :-)
>
> P.
>
> -----Original Message-----
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
> Gary Tall
> Sent: 30 May 2012 21:56
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Light level monitoring - to add to
Homevision/Comfort
>
> I've worked out how to do this now
>
>
>
>
>
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
> Gary Tall
> Sent: 29 May 2012 22:31
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Light level monitoring - to add to
Homevision/Comfort
>
>
>
>
>
> I've done some quick testing of one of the external C-Bus PIR's, I can
setup
> a virtual group linked to the sunset/sunrise feature. This turns the
virtual
> group on at sunset but I'm a little confused as to how to setup the
expiry
> as sunrise. All the documentation I've read suggests you can have the
C-Bus
> PIR do this but in the toolkit I don't see this option, just a
standard
> expiry timer you can set up.
>
> I'm very rusty with C-Bus as I haven't used Toolkit for a couple of
years
> now but can anyone give me any pointers as to how to set up the Sunset
to
> Sunrise feature to turn off at Sunrise rather than a set timer.
>
> Whilst it would be nice to get the levels I can't see any way to do
this via
> the gateway so I guess that it is not possible.
>
> Thanks
>
> Gary
>
> From: ukha_d@xxxxxxx<mailto:ukha_d%40yahoogroups.com>
> [mailto:ukha_d@xxxxxxx<mailto:ukha_d%40yahoogroups.com>
 ] On Behalf
> Of Gary Tall
> Sent: 28 May 2012 20:30
> To: ukha_d@xxxxxxx<mailto:ukha_d%40yahoogroups.com>
> Subject: RE: [ukha_d] Light level monitoring - to add to
Homevision/Comfort
>
> Thanks Kevin. I don't have any of the internal C-Bus PIR's (SWMBO
didn't
> want too many things visible on the interior).
>
> It is a good call though as I do have six of the external PIR's though
> around the exterior of the house. It's a long while now since I've
opened
> the C-Bus Toolkit but it appears they have a sunset/sunrise feature
too. It
> looks like I could create a phantom light group for each of these and
use
> the state of these to determine whether the lights should turn on
on/off in
> the appropriate rooms.
>
> I need to have another look though as I can see how I turn the phantom
light
> on at "sunset" but not how to turn it off at
"sunrise"
>
> Thanks
>
> Gary
>
> From: ukha_d@xxxxxxx<mailto:ukha_d%40yahoogroups.com>
> <mailto:ukha_d%40yahoogroups.com>
 [mailto:ukha_d@xxxxxxx
> <mailto:ukha_d%40yahoogroups.com>
 <mailto:ukha_d%40yahoogroups.com>
 ] On
> Behalf Of Kevin Hawkins
> Sent: 26 May 2012 13:54
> To: UKHA Group
> Subject: Re: [ukha_d] Light level monitoring - to add to
Homevision/Comfort
>
>> Hi Gary,
>>
>> Is it inside or outside that you wish to monitor ? Do you already
have
>> by any chance any of the C-Bus sensors with inbuilt light level
>> reporting ? Some of the ceiling PIR's include this as a bonus
feature
>> (5753PEIRL), you never know, you might already have something.
>>
>> I'd need to check about support within the xAP gateway for these -
>> can't remember if they can report or at least control via a
lighting
>> compatible application or if they're on measurement. I think they
are
>> compatible as they can be used without logic to achieve much the
>> effect you want.
>>
>> I have played with this and it took a bit of refining to get it
>> working acceptably. I use sensors within the room now (xAP
reporting
>> but IDRANet hardware not C-Bus ) and also have outside light level
>> reporting. The lights can vary in brightness to maintain an inside
>> minimum lighting level but in practice they were mostly on/off in
the
>> not brightly illuminated room. Ramp times reduced the switching
>> annoyance. I also had to set up some logic to avoid this happening
>> when unoccupied and/or at weird times like at dawn if it got
brighter
>> and then darker again. Hysteresis was important too and I found
that
>> the lights were not sufficiently bright to avoid the room going a
lot
>> dimmer in overcast periods. I think you need a lot of reserve
>> brightness (wattage) to actually maintain a constant brightness if
>> that's your goal.
>>
>> Here's a couple of graphs for yesterday .. one inside and one
outside.
>> The shape of the curves is quite different and I was surprised how
>> steep the outside light changes were. If you look closely on the
>> inside graph at around 8.30PM you'll see the very small difference
the
>> lights coming on made in their overall contribution, but this was
in
>> more of a mood lit room (i.e. dimmer lighting).
>>
>> Inside http://tinyurl.com/ch8qu3m
>> Outside http://tinyurl.com/cx4cfhq
>>
>>
>> K
>>
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