How to Fix Binding Issues Between ExpressLRS Receiver and Transmitter

Question: Why won’t my ExpressLRS receiver bind to the transmitter?

Answer: Start by ensuring both your ExpressLRS transmitter and receiver are flashed with compatible firmware versions. Mismatched versions often cause binding failures. Power the receiver with a stable 5V supply and check that the receiver's LED indicates it’s in bind mode (usually a rapid flashing light). On the transmitter, enter bind mode via the LUA script or your transmitter’s ExpressLRS menu. Keep the receiver and transmitter close during binding to avoid signal issues.

Double-check your receiver’s antenna connections; a loose or damaged antenna can prevent binding. Also, verify that the correct receiver model is selected in your transmitter settings. If you’re using a flight controller, ensure it’s properly connected and set up for ExpressLRS, with the correct UART and serial protocol configured.

Finally, try resetting both devices and repeating the binding process. If problems persist, consult the ExpressLRS GitHub or community forums for firmware-specific guidance.