Switch remotely a radiotor on/off with a 433mhz sender/reciever. Possible?

Well, im new in this arduino stuff.
You get the hole story.
My father in law have a holiday house which have a heating system in the living floor witch can be turned on and off by a Gsm( sms ) module.
The module just sends a minus 12 v out when it receives a sms ( plus 12 v i a common for the outputs )
Is it possible? or should i say how is it possible. Ive bought some 433mhz receivers and transmitters. I would like to wirelessly turn radiotor on in another room.
Can that be done with these transmitter modules ?
Like im giving the transmitter a 1 in the data pin, will it then give a 1 the reciever with can trigger an optocoubler and then a relay for the radiotor?!?
Please help.

Thanks anders

Like im giving the transmitter a 1 in the data pin, will it then give a 1 the reciever with can trigger an optocoubler and then a relay for the radiotor?

Yes, that is easily doable. Use time Tx/Rx module and VirtualWire library.
Follow the examples in the library for Tx and Rx.
http://www.airspayce.com/mikem/arduino/

Probably don't need an optocoupler, just a simple NPN transistor to bring the relay coil- terminal low to turn it on. Add a diode across the relay coils, anode to coil- (with the transistor collector) and cathode to coil+ (5 or 12V supply typically).

The receiver will need an arduino to filter messages and toggle the relay.

i use these premade relay boards: http://dx.com/p/arduino-5v-relay-module-blue-black-121354
cheaper then buying just a relay localy.

Don’t forget to check how many amps you are trying to switch.

you can also get these things premade:

http://www.aliexpress.com/wholesale?shipCountry=us&shipCompanies=&SearchText=Wireless+Remote+Switch&exception=&isFreeShip=y&isRtl=yes&CatId=0&g=y&SortType=price_asc&initiative_id=SB_20131104060901&isPremium=y&filterCat=410606%2C410612%2C410603&groupsort=1&needQuery=n

I use for that www.wiore.com. Up to 6 ELRO wireless power switches. Works well over internet. :slight_smile: