Wifi Read Write basic question

I am a complete novice and have a basic question on Wifi Transmitter receivers. I would like to build a device with three peddles. IF one on the peddles is pressed I want it to light up an LED over wifi using 433Mhz Transmitter receivers. I want to use three separate transmitters receive, one for each peddle. How do I link one transmitter to one receiver? I have no electronics experience so forgive me for the basic question. Is there a specific transmitter receiver i should be using that come as a pair and don't interfere?