Hmm... Disabling the ack would be giving up smiley If it were me, I'd try to find the root cause, systematically working to isolate the problem. The thing to do here is strip back the layers and start from scratch. Can two nodes get the ACK from each other just using the pingpair example from RF24, sitting a few feet from each other? As you move them apart, is there a point at which the messages go through but the acks do not? Do those results change as you change the types of nodes?
I will test with the ping pair between the parent and child ... but the ones that are failing are the ones at higher distances.... so i think without one of them with special antennas not even will talk....
I remember when i had with my home made antennas even at short distance the one with special antenna couldn't send... only receive..
will test and come back...