This is the results from the pingpair_test.pde sketch...
This is using the Mega to transmit:
and this is the Nano as a receiver:
I noticed that both images do not reflect the same "test", but the results are the same no matter what configuration I use..
It receives it, but the mega doesn't receive the ACK... I'm kind of thinking the Mega is faulty. I know the voltage regulator is bad, for sure. I can't even use the barrel plug to power it.