The SI Master is connected directly to the device with an USB OTG (On the Go) cable that can be easily found in many electronic or mobile phone stores for less than €10. Here are some examples: http://www.amazon.co.uk/s/field-keywords=usb%20otg%20cable.
The app also has support for some serial-to-USB converters if you want to connect to an SI Master with a serial interface.
If you have a Bluetooth receipt printer available, you can also print the split times of the runners when they are being readout. From China/Ebay it is possible to buy a cheap printer for about €50.
NOTE: There also exist a Lite version of SI-Droid Event which has some limitations. Please start with installing that version to make sure that your device is capable of communicating with the SI Master. Most of the newer devices supports this but there can be exceptions. More information about which devices and printers that are supported can be found on the web site: http://www.joja.se
Features of SI-Droid Event
✓ Supports SI Masters (BSM7 and BSM8) set to 'Read SI cards' mode
• Both Normal and Extended mode
• Both the USB and the Serial version of the master
• Both 4800 and 38400 baud rate
✓ Can read all types of SICards
✓ Possibility to define courses (manually, from a card or through IOF XML import) and do code checking
✓ Automatically assigns the runner during readout to the best matching course
✓ Automatically fetches the runners name and club from either the card, an own CSV file or from an SICard DB on the Internet (mostly Swedish runners)
✓ Calculates and presents the runners results per course
✓ Can print a runners split times to a Bluetooth receipt printer
✓ Can share the results and split times as HTML, CSV or IOF XML v3.0 files (e.g. for WinSplits)
✓ Possibility to Backup and Restore the complete event to SD card (Restore not possible in Lite version)
✓ Can be configured to play any kind of sound during readout (runner OK, runner mispunched or course not found)