How to fix ExpressLRS receiver binding issues

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. Double-check that the receiver is powered correctly, with a stable 5V or 3.3V supply as required. Put the receiver into bind mode, usually by holding a button while powering on or connecting a bind plug, depending on your model. Then, enter bind mode on your transmitter via the ExpressLRS LUA script or module interface. Make sure the receiver’s LED indicates it’s in bind mode (often a blinking light). Keep the transmitter and receiver close together (within 1 metre) during binding to avoid signal issues. If it still won’t bind, try reflashing the firmware on both devices and verify your settings match, especially the RX slot and module frequency. Lastly, confirm your antenna connections are secure and intact—damaged antennas can cause binding failure. Following these steps should resolve most binding problems with ExpressLRS receivers.