> For the complete documentation index, see [llms.txt](https://docs.freeflysystems.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.freeflysystems.com/astro/maintenance/faq-and-troubleshooting.md).

# FAQ & Troubleshooting

## Known Issues and Solutions

<table data-search="false"><thead><tr><th>Issue</th><th>Solution</th></tr></thead><tbody><tr><td>Battery cells out of balance</td><td>Leave on the charger (under supervision) for about 8 hours</td></tr><tr><td>Cannot control gimbal</td><td>Update Astro and controller. <br><a data-mention href="/pages/-MfEgkLhyBx2gshNPzKR">/pages/-MfEgkLhyBx2gshNPzKR</a></td></tr><tr><td>Astro drifts up/down while hovering</td><td><a href="https://freefly.gitbook.io/astro-public/astro/maintenance-manual/calibration-and-tuning#sensor-calibration">Calibrate accelerometer</a></td></tr><tr><td>Cannot record video using the Sony a7R-IV, or "unable to write to card, check card speed"</td><td>Install a faster SD card into the camera</td></tr><tr><td>Can't connect laptop version of AMC to Astro</td><td>Change the <a href="https://freefly.gitbook.io/astro-public/astro/ecosystem/components/pilot-handsets#hotspot">UDP settings</a></td></tr><tr><td>Gimbal is limp with camera on</td><td><p>Ensure the Astro firmware and your gimbal firmware are both up to date.</p><p> <a data-mention href="/pages/-MfEgdwv8b4b_1lyQ29E">/pages/-MfEgdwv8b4b_1lyQ29E</a></p></td></tr></tbody></table>

## FAQ

| Question                                   | Answer                                                                                                                                                                                                                                                                                                                                                                                                               |
| ------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Is there a compatible LiDAR sensor?        | <p>Yes! Freefly offers the <a href="/spaces/WXREyAKYAeQJ4gfg2SPg/pages/PKsjinocOGdkheWSuHJ4">Flux Lidar payload </a>for super fast in-field processing. </p><p></p><p><a href="/spaces/WXREyAKYAeQJ4gfg2SPg/pages/oMI0k9h3384CBFOvVWqZ">Hovermap ST-X</a> offers autonomous flight in GPS-denied environments.</p><p></p><p><a href="https://freeflysystems.com/payloads">See all compatible LiDAR payloads</a>.</p> |
| Is there a thermal sensor for Astro?       | <p>Yes, Freefly offers a <a href="/spaces/WXREyAKYAeQJ4gfg2SPg/pages/gNjdFnw8zBRt7EZ2sTL4">thermal module upgrade</a> for the Sony LR1 mapping payload.<br><br><a href="https://freeflysystems.com/payloads">See all compatible thermal payloads.</a></p>                                                                                                                                                            |
| Where can I find my Astro's serial number? | <p>The serial number can be found on the belly of the aircraft, near the vibration isolator.<br><img src="/files/TguR4atfLalxYT0YOoay" alt=""></p>                                                                                                                                                                                                                                                                   |
|                                            |                                                                                                                                                                                                                                                                                                                                                                                                                      |

## Advanced Troubleshooting

For in-depth problem-solving, you can check our [Troubleshooting Tree](https://docs.google.com/spreadsheets/d/1DXkk0BmRx9qLbjpBt2KgKYFOQhEGUTcyyQB6rOmb4ac/edit#gid=528435697) or [Astro Support page](https://freeflysystems.com/support/astro-support) for solutions to specific questions or error codes.&#x20;

If you need more help or can't find what you're looking for, please [contact us](https://freeflysystems.com/contact)!


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