How to fix ExpressLRS receiver not binding 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 issues. Next, confirm the receiver is powered correctly—check voltage and connections carefully. Put your transmitter into binding mode, usually by holding the bind button or selecting bind in the LUA script. Then, power up the receiver while holding its bind button or shorting the bind pads as per your model’s instructions. Wait for the LED on the receiver to indicate a successful bind (often a solid light). If it doesn’t bind, try resetting both devices and repeat the process. Also, check your antenna connections; poor antenna contact can prevent binding. Finally, ensure you’re within a couple of metres of the receiver during binding to avoid signal interference. Following these steps should resolve most binding problems with ExpressLRS receivers.