RF24 VS OneButton

Yeah. If you have the main RF24 library installed it's under the examples in "scanner"

No unfortunately I don't. One of the cool things I did learn about the NRF24L01's though is that on the main page run by the guy that is like THE author of the library that everybody uses with them; He has a sketch that you can run and it will scan all of the frequency channels it supports and give you an ascii graph showing which ones it saw signals the most on.

Here is THE library on which 90% of everyone else's libraries are based off of. This guy quite literally wrote the book on these devices. Bookmark this link and treat this guy as the source of truth for all things related to the RF24 series. I recently discovered 8 NRF24L01's that I had stuck away and I've been playing with them for about the past two months and this is my go-to website for anything I want to know about connecting them and using them. 🙃

That's right. Just like Wifi and other radio comms have the ability to vary which specific frequency they make use of, the RF24 line and others give you the ability to choose the default channel. I think each of the available channels is about 100Hz away from each other. Here is the main web page by the author of pretty much the go-to library for the RF24 series of devices. One of the projects he has listed there (if I remember correctly) will go through all of the available channels and give you a psuedo-graphic representation of how much interference it is seeing on each channel in order to hep pick which channel to use so you aren't fighting it out with all of the devices your neighbors might be using with the various devices they have.

I started playing around with my pico and an nrf24L01+ module this week and I was thinking to just hack this a bit more, starting from porting the https://github.com/nRF24/RF24/blob/master/examples_pico/scanner.cpp scanner to micropython.

I used the RF24 library and official datasheet as a reference.

Which Library did you use to interface with the NRF modules? I've tried the RadioHead library and this one but haven't been able to get a successful send/receive between my two Arduinos.

But I didn't know if it worked. I saw a lot of different random signals, but I had no way to know if it was just amplified noise, nor I had a way to know if the downconverter frequency was exactly 2.4GHz, or something else. I have a few cheap nRF24L01 modules around, and plenty of 3.3V Arduino boards, so after a quick read on the nRF24 library (https://github.com/nRF24/RF24), I had a super simple generator running using the carrier wave function of the nRF24.

Matthias Hertel - OneButton library - https://github.com/mathertel/OneButton

Currently I am using OneButton.h library (https://github.com/mathertel/OneButton)) to code  my push button project.

At the moment I'm playing around with the one button library, but I can't figure out how to use the FN key with it. I was hoping to work out how you called that key and use it in the onebutton code.