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 cause binding failures. Power the receiver with a stable 5V supply and confirm it’s correctly connected to your flight controller or setup. Put the receiver into bind mode—usually by holding a button or shorting pads—check the LED status for bind indication. Next, activate bind mode on the transmitter via the Lua script or module settings. Keep the transmitter close to the receiver (within 1–2 metres) during binding. If binding still fails, double-check your antenna connections for damage or poor solder joints. Also, verify that the receiver and transmitter have matching binding phrases or keys set; these must be identical. Finally, try restarting both devices and repeat the bind process. If problems persist, reflash the firmware on both units using the latest ExpressLRS releases and follow the official binding procedure carefully. This step-by-step approach usually resolves binding issues swiftly.