I can report that I have successfully used the TP Link WA830RE to connect to the FC40 app. Will report range from field test shortly. I'll also look to upgrade the antennas too but not sure what to use yet!
Current range from FC40 to Samsung S3 - 500m - 550m - Estimated using Google Earth
Current range from FC40 to Samsung S3 - 500m - 550m - Estimated using Google Earth