"
As for the frequency/SkyEcho, FLARM uses the 'ISM' band (https://en.wikipedia.org/wiki/ISM_radio_band), which is a general-purpose unlicensed radio band allocated by the ITU, unfortunately the ITU allocated a different frequency range in AU/US to Europe.
uAvionix will have to explain whether it's a legal issue or a hardware issue as to why the SkyEcho can't receive the ISM band in Australia (915Mhz). If that could be solved it would be great."
It would be a hardware issue maybe thats why as soon as you select australia it will turn off the FLARM in the SE2
868mhz is not that far away from 915 but the antenna on the internal PCB is made for 868 so it would have a big mismatch
The RF chip nowdays will do the full frequency range but it would be the microstrip antenna
Most likely a new antenna and it would work fine but Australia is a small market so it would require different hardware version