Background: using some Nano's connected to nrf24L01 to send data to a receiver. All is good until I ran out of Nano's. Bought some new ones and now they are not sending or receiving any data.
Troubleshooting: Verified correct wiring, used another nano, (windows updated on me) updated libraries, Swapped out for known good nrf24L01 and same fault... switch to a Mega2560 (and correct pins 50-53) and it worked.
What's going on with these Nano's? It seems like they are not talking on the SPI. What's going on and can I fix it?
(Decent programmer, advanced electronic background)