Nikola19992:
SI4432 seems to have too small range,chineese people say 1000meters,I think it's much less,about 500m.
Well you and the Chinese would be wrong.
Conventional RC control systems will go further than that and systems such as OpenLRS were developed specifically to offer m ore range, not a lot of point in developing an LRS system (Long Range System) if it is actually worse than the conventional offerings.