Why is there no mention of vSP functions or events in the BT900 smartBASIC manual?

With the BT900, all vSP functionality is handled using GATT Client / Server commands, and because of this there are no specific smart BASIC related commands for vSP on this module. To better understand how this is achieved, please review the vsp.uart.bridge sample apps which can be found on the BT900 GitHub  page.