Smart.IO User Guide: V1.0 (2018/06/22) in browseable webhelp format.
Smart.IO API is now documented in browseable Doxygen format: V0.1 2018/02/25 is available here.
Github
The Host Interface Layer code for STM32F4xx written in GCC and STM LL library is now on github: https://github.com/richardman/SmartIO-HostInterfaceLayer-STM32F4 Both generic makefile and JumpStart CodeBlocks IDE project files are included.
SmartConnect is an inexpensive PCB that connects a Smart.IO module to a ST-Nucleo board. It will be for sale in early November, or you can make you own by using the Gerber PCB files here: https://github.com/richardman/SmartConnect-PCB
Schematics:
Smart.IO Schematic in PDF
Arduino Shield for Smart.IO Schematic in PDF
MCU Datasheet
BlueNRG1 Datasheet from ST in PDF