I have been working for a few days with the NRF24L01 modules, and had them working fine for a day. Then next day, powered everything back up, and nothing. After days of mucking around, I think that the Arduino is not communicating with the module properly. I have determined this from using Robin2's 'CheckConnection' sketch as well the 'Scanner' example from the RF24 library.
I have chop and changed all the hardware, even wires, to the point where I can now plug it into one Uno and everything looks fine, then plug it into two different Unos and no good. Conversely I can plug different modules into the working Uno and they are fine.
My basic setup is the NRF24L01+PL+LNA module, plugged into a YL-105 adapter, plugged into an Uno, using 7/8 for CE/CSN and then 11/12/13
The difference between the Uno boards is the one that works has an SMD chip and the others are plug in type.
Any help on what else I can try to get these going would be greatly appreciated.