Remote mains switching

[duncanmcg]

As with all good projects, this one has finally worked in the early hours of the morning, so it doesn't have much of a write-up yet...
...but if you're interested in home automation, I've managed to port some Arduino code to control Maplin remote mains switches with a £5 RF transmitter module.

The project is hosted on github https://github.com/dmcg/raspberry-strogonanoff.

[tand]

Did something similar, but used a bitbanging kernel driver (rfbb) to get more accurate timing.
See https://github.com/tandersson/rf-bitbanger for additional details.
What decoder chip is used in the Maplin sockets?

[maksm]

Uf, very nice idea! But more details would make this a superb post. Like how did you connect the transmitor and the range of control, some details and your motivation for doing this project. Please write more

I've done remote mains controlling via an USB relay, check it out:
http://myraspi.tumblr.com/post/26217760 ... of-concept
This was not done with a RPi, but is all Python driven.

[saturn]

Great idea for controlling mains. Can you share more information how to connect transmitter to Pi?

[duncanmcg]

Did something similar, but used a bitbanging kernel driver (rfbb) to get more accurate timing.
See https://github.com/tandersson/rf-bitbanger for additional details.

Now that's a lot more hardcore than my effort - I'll be stealing ideas

What decoder chip is used in the Maplin sockets?

I don't know - the original source reverse engineered the protocol with an oscilloscope.

[duncanmcg]

I'll post some follow up, including the circuit, on github soon. But if you're motivated - there's really only one way to wire the transmitter - it has VCC, GND, ANT and DATA - VCC accepts 3.3V, and so does DATA.

[fabi280]

Did something similar, but used a bitbanging kernel driver (rfbb) to get more accurate timing.
See https://github.com/tandersson/rf-bitbanger for additional details.
What decoder chip is used in the Maplin sockets?

I guess the Maplin sockets (http://www.maplin.co.uk/remote-controll ... ack-348217) are the same as mine.
Look at this ones I have - they are the same, except the socket type:
http://www.conrad.de/ce/de/product/6464 ... ifeld-30-m (Site is German, but just take a look at those pictures)

So if the IC is called SC5262S then it should work with rfbitbanger:
See http://www.raspberrypi.org/phpBB3/viewt ... 58#p133558

[IanH]

I've got some Maplin remote-controlled sockets - the decoder is an SC2272 chip. The data sheet at

http://electronics-diy.com/download.php ... 72_eng.pdf

details the data format. The transmitter is an SC2262 - see

http://chipcan.com/en/sc2262.pdf

although the hand-held transmitter doesn't follow the given application circuit (the buttons used actually have three sets of contacts - each one connects several of the IC pins to ground when pressed).