nRF24L01+ module not sending data

[mastermindscope]

@Whandall

That's a strange length to trigger some pointer copy, why?

I just want to send my packet without it being altered. In the spiTransfer function you can see that if you use a negative length, the intermediate is used so the packet data is not altered.

@Whandall

The configuration without any CRC seems very dangerous to me.

Why? As far as I understand CRC only checks if you sent this packet already or not. If I want to send a packet twice, because my control inputs aren't changing, I want it to really send and receive twice.

@Whandall

If you intend to make something more understandable,
it should not contain so many magic numbers.

This is a fair point .

@Whandall

If you want to take the "read only bits don't care" approach,
a 0x7F would have made it more obvious, that you want to clear all interrupts.

This is also true. I will make sure to make my code more obvious in future.

I have an update to the whole project. The nano stops doing anything after

@mastermindscope

SPI.begin();

I tried blinking the on-board LED before and after SPI.begin() but only before did the LED do something. Can I not use SPI.begin in the setup?