A massive pain point for users is confusing the generic firmware with the LTU-Rocket firmware. While both use the SX1280, the LTU variant includes specific registers for the Rocket’s external RF switch (needed to toggle between TX and RX modes on the 1W amp). Flashing generic SiK firmware will result in 0mW output because the RF switch never activates.
The firmware follows a :
Here’s the typical workflow for getting LTU-Rocket onto your board. ltu-rocket firmware