Interfacing 433mhz Remote Control Key FOB

[maurosmartins]

Hello all!

For a recent idea that I had I need a remote with one or two keys, the typical electric garage remote would be perfect because of its form factor and price on ebay for example.
eBay auction: #http://www.ebay.com/itm/Universal-Electric-Gate-Garage-Door-Remote-Control-Key-FOB-Cloning-Cloner-433mhz-/152435429297?epid=600821686&hash=item237ddc0fb1:g:uY8AAOSw32lYoWiG
My question is, how to interface this (receptor) with a microcontroller and what to expect.

Does anybody have done this before? Any help would be good!

Thanks in advanced best regards Mauro.

[PA0PBZ]

I'm not sure what you want to do with it and your link doesn't work for me but I guess this is a remote control made to clone another remote control.
If you want something to wireless control a microcontroller it can be done a lot cheaper, see for instance:

http://www.ebay.com/itm/433Mhz-RF-Transmitter-And-Receiver-Modules-for-Arduino-ARM-MCU-Remote-Control-/132259659198

[maurosmartins]

Hello PA0PBZ,

I would like to use one of these to trigger an action, I would like to use it because Of its form factor. I can carry this easilly in my pocket.



What I need to know is how to receiver the key press on the microcontroller.

Best regards  Mauro.

[MattHollands]

Hello PA0PBZ,

I would like to use one of these to trigger an action, I would like to use it because Of its form factor. I can carry this easilly in my pocket.



What I need to know is how to receiver the key press on the microcontroller.

Best regards  Mauro.

Most keys operate on 433MHz. I've had a lot of success using the HopeRF RFM69 module. You can find Arduino libraries online and I ported it to the MBED platform on my github.

[paulcav]

I would like to use one of these to trigger an action, I would like to use it because Of its form factor. I can carry this easilly in my pocket.

What I need to know is how to receiver the key press on the microcontroller.

Best regards  Mauro.

Hi mauro,

Most of these FOB transmitters come with a reciever

with this receiver it will output on one of the pins to correspond to the keypress. It is based on IC2262/2272 chips. IC Datasheet here.

Have a look here for one that i think will meet your requirements.

This is a datasheet that you can use here

[maurosmartins]

Hello paulcav and MattHollands, thank you very much for your replies.


paulcav, thank you for such complete answer, this helps me a lot, it is very easy to integrate.

MattHollands, you are using the RFM69 for "listening" for those key fobs, or you are suggesting using the RFM69 for creating a 433MHz link? if is for creating the link it is not good for me, I would like to use the already existent key fobs because they are cheap and can easily transported in the pocket.

Best regards, Mauro.

[MattHollands]

Hello paulcav and MattHollands, thank you very much for your replies.


paulcav, thank you for such complete answer, this helps me a lot, it is very easy to integrate.

MattHollands, you are using the RFM69 for "listening" for those key fobs, or you are suggesting using the RFM69 for creating a 433MHz link? if is for creating the link it is not good for me, I would like to use the already existent key fobs because they are cheap and can easily transported in the pocket.

Best regards, Mauro.

I'm suggesting "listening" for those keyfobs. By putting the RFM69 into OOK mode and setting it to a certain frequency, it will fully decode all data sent on that frequency and output it on a pin. You can look for the correct codes for the buttons. In fact I think you can make the module detect codes itself.

[paulcav]

If you want to use device with relays you can have an idea with this one
here

[AlessandroAU]

Check out my GitHub project:

https://github.com/AlessandroAU/ESP8266-433Mhz-and-IR-Bridge-MQTT

You can receive and duplicate those 433mhz OOK/ASK packets with very little hardware. (ESP8266 + 433Mhz modules)