Thank you Peter! I badly needed that "foundation". I'll start from ground zero.
Regarding SPI - could it be used with a RF module?

I just want to receive one a float as string once every minute and dont know how to do it RMT is too complicated for me, and all the examples are only for how to read NEC codes, so im gonna adapt the Arduino library for my needs.

Could you share the config? I still cant figure out how to tune it to read 2000bps from RadioHead.

Thank you for your effort Peter! I will try the basics. Now i print all the channels to the console and am seeing alot of traffic, even with the transmitter turned off, but its useless to me.

Well, i am completely lost :) I didnt know that implementing this "simple" communication is so hard(for me). I have no idea how to use RF transceivers between different platforms and libraries. The only examples for the RMT lib are for NEC remotes and NeoPixel. I just cant believe that nobody is con...

I decided to switch the Arduino lib to RadioHead's RH_ASK as there the docs are cleaner and just started to diving in it

Well, im gonna need some more help guys, as im too bad at radio waves, modulations, etc :) Im gonna send a signed int/float for temperature. Lets say i use the VirtualWire lib on the Arduino nano transmiter for which I've found the following info: http://www.airspayce.com/mikem/arduino/VirtualWire.p...

Thank you guys, i have NO experience with any transmit/receiver module, but im very interested in it, as i need low power one way connection to my esp32 board. The transmiter could be any other architecture . The RMT module looks as good start, i already made a voltage divider for the receiver data ...

This is my pair https://www.amazon.com/SMAKN%C2%AE-433M ... B00M2CUALS

Sorry, i wasn't clear. Im mostly interested in the receiver XD RF 5V, but i could use any other.