Programming a nRF24LU1+

The nRF24L01+ chip is not reprogrammable, but there is an alternative chip nRF24LU1+ that you can program/reprogram. There is not much information about this chip and how to program it.

But there is a guy that created a project using SDCC to be flashed on nRF24LU1+:

It would be great if nRF24LU1 modules were as easy to find (and low cost) was nRF24L01+.