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 prevent binding. Power the receiver correctly, using a stable 5 V or 3.3 V supply as specified. Next, enter binding mode on the receiver—this usually involves holding a button or shorting pads while powering it on. Then, activate binding mode on the transmitter via the Lua script or module interface. Check the antenna connections on both devices; loose or damaged antennas reduce signal and can block binding. Also, verify you’re using the correct binding procedure for your hardware version, as it can vary. Keep the transmitter and receiver close (within a metre) during binding to ensure strong signal. Finally, if binding still fails, try reflashing the firmware on both devices with the latest release, making sure to select matching settings like packet rate and power. Following these steps should resolve most binding issues with ExpressLRS setups.