Why does my ESC keep beeping and won't arm?

Question: Why does my ESC keep beeping and not arm?

Answer: Continuous beeping from your ESC usually indicates it hasn't received the correct arming signal or there is a configuration issue. First, ensure your transmitter throttle stick is at the lowest position before powering up the ESC. Many ESCs require this to arm properly. Next, check the ESC calibration: disconnect the battery, hold the throttle at maximum, then connect the battery until you hear the confirmation tones, and finally lower the throttle to minimum to complete calibration. Also, verify that your ESC and flight controller are properly connected and configured, especially the throttle channel and signal polarity. Make sure your battery voltage is sufficient; low voltage can cause beeping. If your ESC has a programmable LED or beeping code, refer to its manual to decode the pattern. Lastly, inspect for any physical damage or loose wires. Following these steps should help your ESC arm correctly and stop beeping.