OS CC-2540 Directory Structure \Final Design.png -- Start here to see how the board is layed out \BLE v1.0 prater mod.sch -- HM-10 Host board schematic \BLE v1.0 prater mod.brd -- HM-10 Host board layout \OSCC2540 - BOM.csv -- HM-10 Host board Bill Of Materials \ATMega 328 SPI\ATMega 328 SPI.atsln -- ATMega 328 Firmware Project file for ATMEL Studio 6.2 \HM-10 Hack\HM-10 Firmware\Projects\ble\HostTestApp\CC2540\HostTestRelease.eww -- IAR Project file for CC2540 firmware \Interface Board\Interface Board.zdsproj -- Project file for Zilog interface board \HM-10 SDI\HM-10 SDI.sln -- Visual Studio 2013 project for windows interface to OS-CC2540 Best steps to start prototyping the firmware Look over the Final Design.png Look over Board schematic and layout Order BOM parts Order HM-10 Host Board from OSH Park Build Board Flash ATMega Firmware Flash CC2540 Firmware Start Issuing Commands via SPI to HM-10 Host Board