[OpenTRV-dev] OpenTRV at local ham club
Bo Herrmannsen
EMAIL ADDRESS HIDDEN
Tue Jul 29 11:00:49 BST 2014
only if they have upgraded the fuses then.... but will look for it
2014-07-29 11:59 GMT+02:00 Stuart Poulton <EMAIL ADDRESS HIDDEN>:
> 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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>> >
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>>
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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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--
|||||
@(~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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