I would like to use a 433 LRS system with an FPV plane (X8) but the alternative 3DR 900 Mhz telemetry hardware is not permitted in Germany even if you have an Amateur Radio Licence as I do. The 800-1000 Mhz band is widely used by mobile phones and 3G/4G systems.
Has anyone had any success using the 2 way link on 433 LRS systems like, for example, the ImmersionRC system for APM telemetry. Thinking about it, even if the software could be made to work for the telemetry downlink, the uplink would still have to time share with the RC control signals so I am not sure how effective it would be.
Or alternatively, is there any way to allow the 3DR 433 telemetry hardware to be in use with 433 LRS without massive adjacent channel interference? I have tried a very short experiment with a HK openLRS system but without much success.
In Germany, large parts of the 430-440 Mhz/70Cm amateur band are available for use by telemetry but any solution would need to be legal.
I expect someone has already tried this but I cannot find anything in a forum search. Any help or pointers gratefully received.