[OpenTRV-dev] Occupancy sensing, was intro

[Bo Herrmannsen]

yes.. and it does not have to be acurate at all... just under 70%... maybe 
let it drift arround 65%

-----Oprindelig meddelelse----- 
From: Damon Hart-Davis
Sent: Tuesday, October 01, 2013 6:10 PM
To: Closed list for developer discussions
Subject: Re: [OpenTRV-dev] Occupancy sensing, was intro

Yes, humidity is certainly a possibility, and indeed a good one for 
improving user willingness to use the system.  We could aim to keep RH% 
under 70% for example.

But not this round: too much basic stuff still to get working!

Rgds

Damon


On 1 Oct 2013, at 10:41, Bo Herrmannsen wrote:

> of course keep it small
>
> it was more like worst case if we had to upgrade at some point
>
> after adding the RFM irq we have 2 digital left unless i overlooked one
>
> and the analogs of course... while on the analog i figured one use for 
> them... attach an analog humidty sensor and heat room so it does not get 
> to "wet".. ie if user sets a low temp like 5 and water starts to run down 
> the walls
>
> /bo
>
> -----Oprindelig meddelelse----- From: Damon Hart-Davis
> Sent: Tuesday, October 01, 2013 7:45 AM
> To: Closed list for developer discussions
> Subject: Re: [OpenTRV-dev] Occupancy sensing, was intro
>
> Hi,
>
> My view is the reverse: we already have *lots* of I/O which should suffice 
> and we ought to be able to trim to fit.  We want to keep small and simple 
> for cost and power reasons.
>
> But I think that the SMD version of the ATmega328 has a couple of extra 
> I/O pins available anyway.
>
> Rgds
>
> Damon
>
>
> On 1 Oct 2013, at 05:58, Bo Herrmannsen wrote:
>
>> hmm
>>
>> i was thinking... what if we run out of io pins... what is the next step 
>> in line of atmel chips we can but arduino on?
>>
>> /bo
>>
>> -----Oprindelig meddelelse----- From: Damon Hart-Davis
>> Sent: Monday, September 30, 2013 2:41 PM
>> To: Closed list for developer discussions
>> Subject: [OpenTRV-dev] Occupancy sensing, was intro
>>
>> Hi,
>>
>> Please excuse some savage editing of subject line and below.
>>
>> OpenTRV occupancy is still a lot more primitive than I'd like, but one 
>> technique I use a fair amount (sometimes it seems like only tool in my 
>> inadequate stats toolkit) is interquartile ranges of values observed over 
>> at least a day or preferably 7 days.
>>
>> So, for example, when background luminance is the the lowest quartile 
>> having measured for at least a day, I deduce that people are not using 
>> the room or at least not active.  That's reasonably robust and doesn't 
>> depend on absolute levels.
>>
>> A similar thing might work for even doppler: *relatively* little activity 
>> may be interpretable as equivalent to none or lack of occupancy.
>>
>> But the stuff you're talking about sounds good too.  Good novel sensors 
>> and good signal processing / stats are a winning combo, I hope.
>>
>> Rgds
>>
>> Damon
>>
>>
>> On 30 Sep 2013, at 13:29, Adrian Godwin wrote:
>>
>>> The problem with Doppler is that I want to detect occupancy without 
>>> movement, eg sleeping. This isn't easy but we're experimenting with some 
>>> 16 pixel thermal cameras. These might be able to learn environmental 
>>> warmth and distinguish it from bodies.
>>>
>>> On 30 Sep 2013 12:03, "Bo Herrmannsen" <EMAIL ADDRESS HIDDEN> wrote:
>>> ...
>>>
>>> Hmm... about sensor... is that not only true for IR types?...
>>>
>>> /bo
>>>
>>> From: Adrian Godwin
>>> Sent: Monday, September 30, 2013 11:57 AM
>>> To: Closed list for developer discussions
>>> Subject: Re: [OpenTRV-dev] intro
>>>
>>> ...
>>
>>> On Mon, Sep 30, 2013 at 10:42 AM, Bo Herrmannsen 
>>> <EMAIL ADDRESS HIDDEN> wrote:
>>> Hi
>>>
>>> ...
>>
>>>
>>> From: Adrian Godwin
>>> Sent: Friday, September 27, 2013 12:27 PM
>>> To: EMAIL ADDRESS HIDDEN
>>> Subject: [OpenTRV-dev] intro
>>>
>>> Hi,
>>> ...
>>>
>>> I was at the Connecting Homes even in connection with an energy-managed 
>>> house project. This also requires good occupancy sensors and we're 
>>> looking at a crude thermal imaging camera. We think there might be a 
>>> case for making a ceiling-mounted occupancy sensor with light and 
>>> temperature sensors and I'm wondering if this could share some 
>>> development with your plans.
>>>
>>> -adrian
>>>
>>>
>>
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