Software modules for nRF24LU1+.
The modules provide an interface to some of the hardware modules that can be controlled by the MCU. Some hardware modules do not have a software module as they are too flexible to have a general interface. Timers are an example.
Please note that the RF tranceiver is functionally compatible with nRF24L01+. This collection therefore only contains a module for the on-chip SPI interface to the tranceiver. For radio usage use the module for nRF24L01+.