How to Fix ExpressLRS Receiver Not Binding to Transmitter

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

Answer: First, ensure both your ExpressLRS transmitter module and receiver are running compatible firmware versions. Mismatched versions often cause binding issues. Next, verify you’ve entered bind mode correctly on both devices—usually by powering the receiver with the bind button held or shorted, and putting the transmitter module into bind mode via its LUA script or button. Check your antenna connections; a loose or damaged antenna can prevent binding. Make sure your transmitter and receiver are within 1–2 metres during binding to avoid signal loss. Also, confirm that your receiver’s power supply is stable and within the recommended voltage range. If you’re using a flight controller, ensure it’s properly connected and configured for ExpressLRS. Lastly, try resetting both devices to factory defaults and repeat the bind process. If issues persist, consult the ExpressLRS documentation or community forums for device-specific tips.