Hardware: Robotdyn Nano knockoff with a Robotdyn RF24 knockoff. I went with a Nano because I wanted small and I went with Robotdyn because they boasted high current on the 3.3VDC line of their Nano. This would ostensibly solve all the trouble I'd read about with the sensitivity of the 3.3Vdc on these RF24+ modules. But for good measure I soldered on a 10uF cap between 3.3V and ground anyway. The Nano and RF24 module are hardwired (soldered) together and the only deviation from the recommendation is the CSn (SSn) is on pin 10, not 8. This is because according to the Nano pin-out pin 10 a dedicated CSn pin.
Software: Downloaded the TMRh20 library and put it where it belonged. For a sketch I used the starter code from YourDuino. It looks like so many other RF24 starter, or "Getting started" programs - oops, sketches, and it compiled.
Since I am more interested in RF testing I decided to forego the second, "receive" module and set only one module to dutifully transmit at a 500ms clip. Along with my 2.4GHz spectrum analyzer I'd have all I need for my initial 2.4GHz band RF experimentation. Or so I thought.
So far, I see nothing on the waterfall of my spectrum analyzer. With the two antennas practically touching I see not even a glitch. Either this RF24 module has the most poorly tuned antenna ever, or my set-up simply isn't transmitting. Based on what I've seen when these things actually work, I'm betting on the latter.
So, finally a question, when using the TMRh20 libraries, do these RF24 modules need to be paired to transmit? When I look at the serial monitor for the transmitter it prints and increments just like the sketch tells it to, but I don't see a corresponding 500ms blip on my spectrum analyzer.