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 transmitter and receiver are running the same ExpressLRS firmware version to guarantee compatibility. Power the receiver with a stable 5V supply and check that the binding button or pad is pressed while powering up the receiver to enter bind mode—usually indicated by a flashing LED. On the transmitter, select the correct model profile and activate bind mode. Make sure the receiver antenna is properly connected and not damaged, as poor signal can prevent binding. Verify the receiver’s UART or CRSF port is correctly wired to your flight controller if applicable. Also, confirm your transmitter’s RF module is securely seated and configured for ExpressLRS. If binding still fails, try moving to an open area to avoid interference and reduce distance to under 5 metres. Finally, re-flash the firmware on both devices if needed, and double-check all settings match, including frequency bands and power levels. Following these steps should help establish a successful bind.