Decode and Send 433 MHz RF Signals

with Arduino

This guide shows how to use an Arduino to decode 433 MHz signals from RF remotes,

and send them with an Arduino and a 433 MHz transmitter to remotely control mains

switches outlets.

Why Decoding RF Signals?

I’ve tried different methods of controlling the mains voltage, but some of the methods

require:



Experience dealing with AC voltage



Opening holes in your wall/ceiling/switches



Modifying the electrical panel



Knowing the electrical rules for each country

It’s difficult to come up with a solution that is safe and works for everyone. One of the

easiest and safest ways to remotely control appliances connected to mains voltage is

using radio frequency (RF) controlled outlets. Why? Using remote controlled outlets

have 5 benefits:

1. Fairly inexpensive

2. Easy to get

3. Works with ESP8266 and Arduino