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

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

Answer: First, ensure both your transmitter and receiver are running compatible ExpressLRS firmware versions. Mismatched versions often prevent binding. Power the receiver properly—use a stable 5V or as specified in the manual—and confirm the receiver’s bind button or pad is correctly pressed or shorted during power-up to enter bind mode. On your transmitter, enter the ExpressLRS Lua script, select the correct module, and initiate bind mode. Check that the receiver’s LED indicates binding status (usually blinking during binding and solid when successful). If it doesn’t bind, verify your wiring connections, especially signal and ground between the receiver and flight controller or power source. Also, ensure you’re using the correct frequency settings and that no other ExpressLRS devices nearby are interfering. Finally, try a full power cycle on both devices and repeat the binding process. Following these steps should resolve most binding issues.