I'm trying to get a simple TX/RX pair to work. I've got identical Nanos and I'm using the example from: http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo
I followed the advice about adding a cap across the Vcc GND on the nrf board, and added a 10uF electrolytic to both.
I still haven't received a packet yet, and I wondering how to eliminate the power supply as a cause. I scoped the power pins, and even without a cap I got about 250mV of ripple. With the cap it goes down to about 100mV. Is this within tolerance? What kind of caps does anyone else use, and has anyone scoped the result to see where the threshold lies?
Aside form that, are there any other clever ways to debug this issue?
Update 20160122. I finally tested using those cheap piggyback 3.3v regulator boards that plug straight into the nrf board. Works perfectly, not one lost packet over 5000 packets sent. Interestingly, the RX side appears to be the fussy one. Thanks to everyones' suggestions. For a total combined cost of about 4$ per node, I have a great wireless TX/RX solution.