nrf 2401 w/ code rf24.h by tmrh20 serial print problem

Used code from tmrh20 for nrf2401 transmitter and receivers.
Check pinout once, twice, thrice, four times. Wiring is checked.
Code is tested, used, posted.
Serial monitor prints out "????" when it should print "Press T"

See code file attached: file is the same for transmit and receive modules.
See link for pin-out:
Have followed specs, double-checked, and varied wire connections.
Looking for an educated guess on why it would print "????" instead of the print TMRH20 coded in.

As far as I can tell, the project is 99.5 percent complete: code, wiring, etc. There is just one little teeny bitty problem that is eluding me.

transmit.ino (4.75 KB)

Console baud rate? It needs to be the same speed used in Serial.Begin(). I’d look at your code and tell you but I cannot do that since I’m using a tablet and you attached your code rather than inserting it inline with code tags (the </> icon).

Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Thanks.. Tom... :slight_smile:

Have a look at this Simple nRF24L01+ Tutorial. I have deliberately made them as simple as possible and they have been proved to work by other Forum users.