Welcome to the hardware section of the APM forum!
Before posting, please check the hardware sections of the wiki table of contents and search this subforum for existing answers to your question. Help avoid duplicate threads by finding other operators with the same issue.
When formulating your post, use a descriptive title such as "Persistent ESC calibration error" (not "HELP!" or "Problem").
Please include the following information to help diagnose your query:
- Describe the problem you are having. What is the expected verses the observed behavior?
- Provide hardware information such as the brand and version of your autopilot, GPS, radio, and compass, as well as any other pertinent details about your setup.
- What platform and version of the APM firmware version are you running?
Please note that this subforum is the official support forum for genuine 3D Robotics products only. For hardware support of other manufactures' products, please contact the respective manufacturers.