I’ve got a small network of NRF24 radios connected through arduino Unos communicating with each other. I’ve tried to shrink everything by replacing the uno with a pro mini. I have created a small board to power the mini and the radio and provides 5v for the mini and 3.3v for the radio.
My problem is that for some reason, the mini’s don’t work. If I watch the traffic through the minis, I can see that everything is connected properly and the minis are receiving traffic. But they aren’t able to send anything. I’ve tried replacing every component and have verified that the exact same components that worked on the uno, does not work with the mini. The same sketch on both as well.
One thing I have noticed is that one the uno, the tx/rx light blinks distinctly, then turns off. On the mini, it stays constantly lit and when it tx, it gets slightly brighter.
I’m getting a bit frustrated with this and have done everything I can think of. Are there any common problems when going between uno and minis? Is the tx/rx light a sign of anything? Any ideas at all on the problem? I know the question is rather vague.
This is a link to the sketch I’m using
And I’ve attached a picture of the board that is powering the radio and mini. Forgot to include the values, but from left to right, its a micro usb, 0.1 cap, transistor, and another 0.1 cap.