RF Communication - key fob types?

Projects Networking, Protocols, and Devices
1

Hello All,

I would like to connect a wireless RF module to a relayduino for wireless, programmable control of relays.

However, it's the first project I do with RF and I don't know much about it...

My main question would be: can a 433mhz receiver use signals from any 433mhz transmitter?

If it can, it would make my life a whole lot easier. Eventually I want to be able to control the relays from as far as 50m with a key fob.

Have any of you guys used key fobs with Arduino before? Any good kits to recommend?

Thanks so much!

-W

2

My main question would be: can a 433mhz receiver use signals from any 433mhz transmitter?

No.
Different transmitters operate at slightly different frequencies, different modulation types (spread spectrum, fm, fsk etc) and protocols.