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Today's Topics:
1. Re: Raspberry pi controlling remote power sockets -
views/experience? (Ian Plain)
2. Re: LUG Meeting this Saturday (Zak Wilcox)
3. Re: Raspberry pi controlling remote power sockets -
views/experience? (Ashley Pittman)
4. Re: Raspberry pi controlling remote power sockets -
views/experience? (Zak Wilcox)
5. Re: Raspberry pi controlling remote power sockets -
views/experience? (Alex Butcher)
6. Re: Raspberry pi controlling remote power sockets -
views/experience? (David Fear)
----------------------------------------------------------------------
Message: 1
Date: Tue, 24 Jun 2014 13:04:00 +0100
From: Ian Plain <ian@cyber-cottage.co.uk>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Raspberry pi controlling remote power sockets -
views/experience?
Message-ID:
<CAPdamw_P=E3mp3223cjCAM6ezPA2RtHsresr7MhUGPM=66VcAA@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Have a read of http://homeeasyhacking.wikia.com/wiki/Home_Easy_Hacking_Wiki
be interested in results as use lots of them round the house would be nice
for a pc interface
On 24 June 2014 12:23, Peter Hemmings <peter@hemmings.eclipse.co.uk> wrote:
>
> Hi,
>
> I have to go upstairs to switch on my router on when I use anything
> downstairs on the WiFi lan. I have lots of other stuff connected via an 8
> way socket so need to simplify things and, ideally put the router on
> another socket. The problem is I keep forgetting to switch off the the
> sockets and have been looking into an interesting use of a pi and some
> remote sockets so I can control everything plus other stuff from the pi!
>
> Before going further, has anyone tried to something like this, if so what
> has been your experience!?
>
> I found these:
>
> http://www.maplin.co.uk/p/remote-controlled-mains-sockets-5-pack-n38hn
>
> but I think Morrisons/Asda were doing them a lot cheaper!
>
> There are quite a few posts/blogs on this but essentially you sniff the
> data sent by the remote that comes with the sockets, then use the Pi to
> replay this data, hopefully triggering the socket to turn on or off!
>
> I have seen Audacity used on the output of a cheap 433khz receiver to
> decode the 4 signals from the r/c transmitter.
>
> Seems an interesting project!
>
> I have also read there is a limitation on the pi's output rate (sorry may
> be wrong terminology!).
>
>
> Regards
>
> --
> Peter H
>
> _______________________________________________
> Bristol mailing list
> Bristol@mailman.lug.org.uk
> https://mailman.lug.org.uk/mailman/listinfo/bristol
>
--
Thanks
Ian Plain
http://www.cyber-cottage.co.uk
Twitter @cyberco
Skype ba17sw
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------------------------------
Message: 2
Date: Tue, 24 Jun 2014 13:24:25 +0100
From: Zak Wilcox <iwilcox@iwilcox.me.uk>
To: bristol@mailman.lug.org.uk
Subject: Re: [bristol] LUG Meeting this Saturday
Message-ID: <53A96DF9.8030206@iwilcox.me.uk>
Content-Type: text/plain; charset=ISO-8859-1
On 23 Jun 2014, Sebastian wrote:
> Who is intending on coming this Saturday and when?
I usually just lurk, but I'll be there Saturday, for the duration.
------------------------------
Message: 3
Date: Tue, 24 Jun 2014 13:49:50 +0100
From: Ashley Pittman <ashley@pittman.co.uk>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Raspberry pi controlling remote power sockets -
views/experience?
Message-ID: <855E41FE-3230-4E18-AD58-D10FBECB1564@pittman.co.uk>
Content-Type: text/plain; charset=windows-1252
I do this a reasonable amount, I have my central heating controlled by raspberry pi amongst other things.
Right now I?m using a network PDU for the heating and other critical controls, this is working fine but takes up a lot of space, where I use wireless power sockets are for the fish tank lights and a ?daylight alarm clock? which is where the lights come on slowly over a ten minute window to wake you up in the morning. The downside of using remote power sockets is it?s simplex - there is no feedback to confirm the state change and as with all communications channels there are losses.
For this I?m using a ?tellstick duo? which comes from a swedish company, this is a little USB module that plugs into the Pi and can transmit to most of the cheap receivers you can get, for simple on/off it seems to work with 90% of brands, for dimming it?s a lot more fussy and additionally some of the receivers themselves do a good job, for example the protocol specifies 256 levels of brightness however with one of the receivers that I have this maps onto about 10 discrete levels, the lowest of which I estimate to be around the 70% level. The other dimmer receiver is almost imperceptible when on at it?s dimmest which is ideal for the alarm clock.
There are cheaper approaches, for example you can use a arduino with a 433.92 MHz transmitter to talk to the same protocol but it?s a lot of work getting this working and I?ve found it's very much a case trial-and-error so unless you?re interested in the process or have future plans I?d recommend sticking with the tellstick.
What I?m looking at currently is wireless temperature sensing with a arduino, a temperature probe and some nRF24L01 wireless modules that work with both arduino and raspberry pi, this again is partly for fun but also because the Arexx bs-1000 that I?m currently using is just not very good.
Ashley,
On 24 Jun 2014, at 12:23, Peter Hemmings <peter@hemmings.eclipse.co.uk> wrote:
>
> Hi,
>
> I have to go upstairs to switch on my router on when I use anything downstairs on the WiFi lan. I have lots of other stuff connected via an 8 way socket so need to simplify things and, ideally put the router on another socket. The problem is I keep forgetting to switch off the the sockets and have been looking into an interesting use of a pi and some remote sockets so I can control everything plus other stuff from the pi!
>
> Before going further, has anyone tried to something like this, if so what has been your experience!?
>
> I found these:
>
> http://www.maplin.co.uk/p/remote-controlled-mains-sockets-5-pack-n38hn
>
> but I think Morrisons/Asda were doing them a lot cheaper!
>
> There are quite a few posts/blogs on this but essentially you sniff the data sent by the remote that comes with the sockets, then use the Pi to replay this data, hopefully triggering the socket to turn on or off!
>
> I have seen Audacity used on the output of a cheap 433khz receiver to decode the 4 signals from the r/c transmitter.
>
> Seems an interesting project!
>
> I have also read there is a limitation on the pi's output rate (sorry may be wrong terminology!).
>
>
> Regards
>
> --
> Peter H
>
> _______________________________________________
> Bristol mailing list
> Bristol@mailman.lug.org.uk
> https://mailman.lug.org.uk/mailman/listinfo/bristol
------------------------------
Message: 4
Date: Tue, 24 Jun 2014 13:53:12 +0100
From: Zak Wilcox <iwilcox@iwilcox.me.uk>
To: bristol@mailman.lug.org.uk
Subject: Re: [bristol] Raspberry pi controlling remote power sockets -
views/experience?
Message-ID: <53A974B8.5000700@iwilcox.me.uk>
Content-Type: text/plain; charset=ISO-8859-1
On Tue, 24 Jun 2014 Peter Hemmings wrote:
> I have to go upstairs to switch on my router on when I use anything
> downstairs on the WiFi lan.
What's the motivation for keeping it off when unused? Power savings?
The educational fun of building a remote switch? Because it's the
future and you want your jetpack? Many moons back I bought an X10
wirelessly switched plugthrough socket with the goal of saving power
when stuff didn't need to be on. I got warm fuzzies from using it, but
later I borrowed one of those plug-through watt-meter thingys and
measured everything, and found it was quite thirsty itself with or
without the load plugged in --- more thirsty even than the thing I'd
controlled with it, which was a disappointing own-goal.
So if efficiency is the aim and you're buying a widget, see if you can
find the widget's own power draw in its specs.
I've never tried it and my hardware-fu is non-existent, but I've a hunch
that if your Pi is always on anyway, a homebrew setup with a relay would
consume the least.
------------------------------
Message: 5
Date: Tue, 24 Jun 2014 14:56:14 +0100 (BST)
From: Alex Butcher <lug@assursys.co.uk>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Raspberry pi controlling remote power sockets -
views/experience?
Message-ID: <alpine.LFD.2.03.1406241450470.7724@nffheflf.pb.hx>
Content-Type: text/plain; charset="iso-8859-15"; Format="flowed"
On Tue, 24 Jun 2014, Zak Wilcox wrote:
> On Tue, 24 Jun 2014 Peter Hemmings wrote:
>> I have to go upstairs to switch on my router on when I use anything
>> downstairs on the WiFi lan.
>
> What's the motivation for keeping it off when unused? Power savings? The
> educational fun of building a remote switch? Because it's the future and
> you want your jetpack? Many moons back I bought an X10 wirelessly
> switched plugthrough socket [but] found it was quite thirsty itself with
> or without the load plugged in --- more thirsty even than the thing I'd
> controlled with it, which was a disappointing own-goal.
^ This.
If you're determined to do something like this, Lidl have the plugs and
controller on offer periodicaly for about ?13-15.
Even Wilkinson have them (exactly, by appearances, though possibly with
fewer plugs) for ?20:
<http://www.wilko.com/switches+sockets/wilko-remote-control-wall-plugs/invt/0343066?VBMST=remote%20mains>
I use my Lidl ones for a bunch of uplighters, a table lamp, and to power off
an active subwoofer that would probably annoy my neighbours late at night if
watching a movie.
Best Regards,
Alex
------------------------------
Message: 6
Date: Tue, 24 Jun 2014 15:05:07 +0100
From: David Fear <david@dfear.co.uk>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>,
Peter Hemmings <peter@hemmings.eclipse.co.uk>
Subject: Re: [bristol] Raspberry pi controlling remote power sockets -
views/experience?
Message-ID: <53A98593.4030105@dfear.co.uk>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 24/06/14 12:23, Peter Hemmings wrote:
>
> Hi,
>
> I have to go upstairs to switch on my router on when I use anything
> downstairs on the WiFi lan. I have lots of other stuff connected via an
> 8 way socket so need to simplify things and, ideally put the router on
> another socket. The problem is I keep forgetting to switch off the the
> sockets and have been looking into an interesting use of a pi and some
> remote sockets so I can control everything plus other stuff from the pi!
>
> Before going further, has anyone tried to something like this, if so
> what has been your experience!?
>
> I found these:
>
> http://www.maplin.co.uk/p/remote-controlled-mains-sockets-5-pack-n38hn
>
> but I think Morrisons/Asda were doing them a lot cheaper!
>
> There are quite a few posts/blogs on this but essentially you sniff the
> data sent by the remote that comes with the sockets, then use the Pi to
> replay this data, hopefully triggering the socket to turn on or off!
>
> I have seen Audacity used on the output of a cheap 433khz receiver to
> decode the 4 signals from the r/c transmitter.
>
> Seems an interesting project!
>
> I have also read there is a limitation on the pi's output rate (sorry
> may be wrong terminology!).
>
>
> Regards
>
Hi
Wouldn't leaving the router on be a much easier solution. Most routers
and wireless routers only use (at max) 3w. Have a separate extension
lead for the stuff that is to be kept on.
Found some cheaper ones:
REMOTE CONTROL MAINS SOCKET ADAPTOR SET - 5 PLUG IN SOCKETS & REMOTE
INCLUDED
http://www.ebay.co.uk/itm/REMOTE-CONTROL-MAINS-SOCKET-ADAPTOR-SET-5-PLUG-IN-SOCKETS-amp-REMOTE-INCLUDED-/161336288206
?24.49
specs for above:
Voltage 240Vac, 50Hz
Max. load 2400W
Max. current 10A
Transmission frequency 433.92MHz
Remote battery 12V, A23
Socket dimensions 112 x 58 x 65mm
Remote dimensions 81 x 35 x 15mm
Standby Power 1.0W
Interesting project.
This maybe a better option for your needs:
Web Controlled 8-Channel Powerstrip
http://www.instructables.com/id/Web-Controlled-8-Channel-Powerstrip/
--
Regards
-----------------------------------
Dave Fear :: david@dfear.co.uk
Order your free giffgaff SIM card through my page and get 5 pounds free
credit http://t.co/z1KJF5y
------------------------------
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