У вашего броузера проблема в совместимости с HTML5
Watch this video to learn how to connect a Serial RS232 device to a computer using a USB to serial adapter. The adapter in this video is perfect for connecting cellphones, PDAs, digital cameras, modems, ISDN terminal adapters, or any Serial RS232 device through the USB port on a computer.
C2G Serial Adapters: http://www.cablestogo.com/category/adapters/adapters-usb/adapters-usb-serial
C2G Serial Cables: http://www.cablestogo.com/category/pc/pc-serial/null-modem-cables
C2G HDMI Matrix Selector Switch: http://www.cablestogo.com/product/40011
www.c2g.com
Music: "Microchip" by Jason Farnham