[OpenTRV-dev] OpenTRV at local ham club
Stuart Poulton
EMAIL ADDRESS HIDDEN
Tue Jul 29 10:59:30 BST 2014
Bo,
Take a look at the B+, I think it will remove the requirement for a 4
port hub.
Stuart
On 29/07/14 10:56, Bo Herrmannsen wrote:
> this time i take i from top and down,
>
> yes, heating should be controlled just as you wrote, some might unlock
> the house and not have the sms access, of course they will not have
> the benefits of a preheated house, but what the heck... and LED to
> show status would be nice to tell them that heat is comming
>
> Interesting about the 3G dongle... but maybe in my case i can make do
> with the alarm system if there are a spare input and output, will have
> to check it
>
> As for current yes... i will prop give the pi its own 5V supply, then
> a 4 port usb hub with its own supply of 2A
>
>
>
>
> 2014-07-29 11:43 GMT+02:00 Gareth Coleman <EMAIL ADDRESS HIDDEN
> <mailto:EMAIL ADDRESS HIDDEN>>:
>
> Hello everybody, I thought I'd take the chance of chipping in even
> though I almost certainly don't fully understand the situation!
>
> Seems like you have two separate requirements, one to turn the
> heating on and off by text message, and the other to turn the
> heating on/off by the alarm output (indicating occupancy). And by
> 'off' you mean set the desired temperature to 5 degrees C, 'on' is
> set to 19 or so.
>
> We've experimented with using a cheap 3G dongle attached to a
> raspberry pi and using free software called gammu to send text
> messages. The software also receives text messages and drops them
> into a folder on the raspberry pi's filing system. It's pretty
> straightforward to set up - to make things easy we bought a
> known-compatible dongle off ebay for £10. Just make sure the Pi
> has a decent power supply so that the surges of current the dongle
> needs don't make the Pi brown-out.
>
> From there you could use any sort of simple text parsing system
> that is familiar (python, node.js, bash etc) to work out if the
> heating system should be changed to enter frost mode. Personally
> I'd use node-red because I think it's really good at allowing
> non-programmers to understand the system configuration. You don't
> want to be called out every time the system needs tweaking - the
> end-users need to 'own' the system. However if they are hams then
> they might be comfortable on the command line editing code
> directly, maybe not.
>
> One of the many great things about node-red is that you get a web
> interface out of the box, it looks like the attached image. It
> would be fine for slightly technical people, not so great for the
> general public as you can easily deploy new code that breaks things.
>
> Interfacing with the alarm might be more trivial or not, depending
> on how the alarm works (I've not experimented with such systems).
> But assuming it's something accessible such as a relay contact or
> a simple signalling voltage with some ability to source current,
> you can just whack it into the Pi's gpio pins (maybe use an
> opto-coupler or buffer to make things more robust) and take things
> from there.
>
> Hope that helps
>
> Gareth
>
>
> On 29 July 2014 10:35, Kevin Wood <EMAIL ADDRESS HIDDEN
> <mailto:EMAIL ADDRESS HIDDEN>> wrote:
>
> Hi Bo,
>
> I'm actually working on something quite similar at the moment
> for a second
> home that needs frost protection / monitoring remotely, in
> this case with
> oil fired heating.
>
> My plan is a raspberry pi attached to an AVR which controls
> the heating
> system.
>
> I'm thinking that the AVR can harvest temperature data from a
> couple of
> OneWire sensors, run the heating and hot water schedules and
> control
> relays that activate the heating system as required. It'll
> also have an
> RFM on the board for later integration with OpenTRV and, if I
> can reverse
> engineer it, the wireless oil level sensor on the oil tank.
>
> R-Pi can host a web interface or, more likely in the first
> iteration,
> provide a mechanism to at least SSH into it and check
> everything remotely.
> Of course it could also do email notifications and SMS would
> be possible
> either via an internet SMS gateway, or just hang a GSM module
> off it with
> a cheap pay as you go SIM installed?
>
> Does this premises have internet connectivity?
>
> Kevin
>
> > I was at local ham club last night at looked at their heating
> >
> > So far i "THINK" its all electrical heating as there is no
> district
> > heating
> > installed, makes things a bit more easy since heat not used
> will go back
> > to
> > the cylinder :-D
> >
> >
> > Next bit, there is one big room with 4 rads, which means one
> box should
> > control them all, the box will be central placed. Its mainly
> old timers so
> > the less complicated the better, the rest of the rooms are
> one rad per
> > room.
> >
> >
> > Mostly @kevin but others might chip in, they have some kind
> of remote
> > control where they can send a text to turn stuff on and they
> would like to
> > be able to turn on the heat remotely, how could we get to that?
> >
> > the point is that when the house is locked heating should
> turn off
> > completely or run at 5degree to prevent frost issues. then
> either by
> > remote
> > command or when house is unlocked it should go to warm mode,
> there would
> > be
> > no need to sense if its day or night or if people are in the
> room etc. the
> > alarm will output a signal when its on/off
> >
> > any ideas?
> >
> > /bo
> >
> > --
> >
> > |||||
> > @(~Ô^Ô~)@
> > -------------oOo---U---oOo-------------
> > | |
> > | Bo Herrmannsen |
> > | |
> > | |
> > | "blessed are the "cracked", |
> > | for its they who let in the light" |
> > | Ooo |
> > |_________________ooO____( )________|
> > ( ) ) /
> > \ ( (_/
> > \_)
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> --
> ------------------------
> Gareth Coleman
> layer zero labs
> l0l.org.uk <http://l0l.org.uk>
>
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>
>
> --
> |||||
> @(~Ô^Ô~)@
> -------------oOo---U---oOo-------------
> | |
> | Bo Herrmannsen |
> | |
> | |
> | "blessed are the "cracked", |
> | for its they who let in the light" |
> | Ooo |
> |_________________ooO____( )________|
> ( ) ) /
> \ ( (_/
> \_)
>
>
>
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