...A user can control all devices via a web browser on Android.
Requirements and supported devices.
1. Autoguider: QHY5 or QHY6
2. CCD: QHY8L
3. DSLR: Canon or Nikon DSLR
4. USB serial adapter (FTDI232) for controlling a DSLR camera shutter and a serial shutter cable
http://www.beskeen.com/projects/dslr_serial/dslr_serial.shtml
5. USB serial adapter (FTDI232) for controlling a mount via a serial port
6. Power USB hub: I have used Belkin Ultra Slim Hub (4 ports and 7 ports)
7. Android device (rooted, with usb host, and with kernel supporting usb charging and FTDI driver).