Did simple test on windows Laptop connected to SBGC32 board: 1- Connect the board to my LapTop (USB) 2- Run BGC Gui, looks good, Board info is received, etc. etc. 3- Disconnect the BGC Gui 4- Start Serial Port Utility terminal (free download from CNET, to debug potential serial port issue) 5- Connect to the same port 6- Send command to the board; NO REPLY is received 7- Disconnect 8- Unplug/Plug the board 9- Send same command to the board from the Serial Port Utility; REPLY is received