Here’s an app note from Nordic Semiconductor on using nRF24LU1+ USB HID communication.
The Universal Serial Bus is the de factor inustry standard for the connection of computer peripherals, with approximately two billion sold devices every year. The success of USB is in large part due to its end product ease of use. However, such simplicity comes at a price, as the developer is often burdened with creating complex USB drivers. Fortunately, there is a simpler way to provide devices with USB support.
This application note primarily describes how to use HID to transfer data between a Microsoft Windows application and the nRF24LU1+. It also goes into some detail about the example application, an over-the-air firmware flash updater for the nRF24LE1 using the combined USB and RF features of the nRF24LU1+.