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. …

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

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