ExpressLRS 4.1.0 remains the current stable radio-link release
ExpressLRS lists 4.1.0 as its latest release. The 4.x line is a major-version boundary for mixed fleets and includes fixes affecting specific transmitter and receiver hardware.
Fri, 25 Sep 2026
Radio firmware is infrastructure. A major-version mismatch can strand an otherwise flight-ready aircraft.
Inventory transmitter modules and receiver versions before upgrading a fleet. Update deliberately rather than one radio at a time without a compatibility plan.