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 firmware versions are compatible and up to date. Power the receiver with a stable 5V supply and check the LED indicator; it should flash rapidly when in bind mode. To bind, hold the bind button on the receiver (or short the bind pads) while powering it on, then activate bind mode on your transmitter. Make sure the receiver and transmitter are close (within 1 metre) during binding. Confirm you’re using the correct frequency band and model profile matching the receiver’s settings. If binding still fails, double-check wiring and solder joints, especially the connection to the receiver’s UART or SPI ports. Also, verify your transmitter’s module is properly seated and configured for ExpressLRS. Finally, try resetting both devices and repeat the binding process. If problems persist, consult your receiver’s manual for specific instructions or test with another receiver/transmitter to isolate the issue.