1. Connect your "Serial WiFi" to USB-Serial converter as shown on this picture:

Rx    <---> Tx
Tx     <---> Rx
Vcc   <---> +5V
GND <---> GND

2. Download most recent WebTop Serial firmware binary from this location ;

3. Turn "SWITCH" on your "Serial WiFi" adapter into "PROGRAM" position ;

4. Flash the firmware binary into your WebTop adapter. Follow these instructions ;

5. Turn "SWITCH" on your "Serial WiFi" adapter into "UART" position ;

6. Connect your "Serial WiFi" adapter to a Dongle Edition as shown on this picture:

7. Use Dongle settings instructions to switch NMEA Output option from USB onto Serial ;

8. Supply power to the Dongle over USB connector ;

9. Move your Dongle into an area of good GPS/GLONASS reception, turn on and leave nearby ;

10. Connect your Tablet/Cellphone to SoftRF Wi-Fi Access Point.
    SSID: SoftRF-XXXXXX
    Key: 12345678
    

11. Open up a browser then proceed to this URL: http:https://192.168.1.1

12. A page like this should come up:
    

13. Open up Settings menu. Select NMEA UDP option. Press Save and restart button.

14. Disconnect from SoftRF AP and connect to internet.
    Install XCSoar app from Google Play.
    Re-connect to SoftRF AP.
    

15. Open the XCSoar app in Fly mode. Double tap the screen then select Config:

16. Select Devices:

17. Push Edit button then configure the device as follows:

18. Push Monitor button and see if your tablet/phone is receiving NMEA data from your Prime Edition Mark II:

19. Return all the way back to XCSoar main screen:

20. Swipe three times to the left to reach Radar View. When any other traffic ^{(OGN Tracker or another Prime MkII)} is around - you should see it on this screen: