Request, new cmds for communication with educational hardware as it is arduino

[debrouxl]

The key factor is that the hardware mentioned here is cheap and wide open for DIY purposes.

You don't connect an expensive StreamSmart or Lab Cradle to the Prime / Nspire. Instead, you leverage some of TI's LaunchPad boards with customizable firmware, or other similarly open and cheap boards which can be made to expose a USB CDC interface on top of a USB VID:PID that the calculator recognizes (knowing that OS patching in RAM, through Ndless 4.2, could technically kill the filtering).

I think it's a good move to keep up with the trends in technology and pricing. TI is implementing the same BASIC commands on the 83PCE/84+CE and the Nspire, providing additional more advanced Lua APIs (Asynchronous Serial Interface, Bluetooth Low Energy) on the Nspire, and defining a de-facto standard.
TI's higher-end, USB-only models are thereby gaining functionality provided on older models through the legacy I/O port, in a more standard way: the legacy I/O port used a relatively slow half-duplex protocol on layer 2.