ESP8266 Community Forum

Does exists way how to use 433MHz RX run on NodeMCU?

THX

I don't really know but I assume that using 433Mhz to switch (radio remote controlled switches) on and of should be possible, about communication as in receiving I'm not so sure.

(This library just beams messages for different types of home automation switches, only uses the Arduino interface, digitalWrite and delay, so should work, it also has a recieving part, but that won't probably work out of the box, it uses interrupts etc.)
https://github.com/hjgode/homewatch/tre ... moteSwitch

Virtual wire is a bi-directional library (can both recieve and send messages)
https://www.pjrc.com/teensy/td_libs_VirtualWire.html

So in general sending messages is easier than receiving messages...

I got both recieving and sending working on the ESP8266, nodeMCU v0.9. with cheap ass 433Mhz radio's. Using this library:

https://github.com/sui77/rc-switch

I also got my switches in the house reacting the RemoteSwitch library, Rock'nRoll in combination with a webserver: https://github.com/hjgode/homewatch/tree/master/arduino/libraries/RemoteSwitch

Here is the code I used to get this working

https://github.com/lemio/ESProjects/tree/master/433Mhz

So to answer your question, both sending and receiving is possible, so you could build a network of cheap 433Mhz transmitters and an ESP to connect to the internet, but perhaps using more ESP's is a easier/better and also cheap solution.