# Skynode S LED status indicator

There are two sets of Red, Green and Blue LEDs on Skynode S.

#### **The LEDs on the MIPI connectors side indicate the status of the companion computer.**

<figure><img src="https://3329189600-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FFW1Ge1p1f6WHyiYCb146%2Fuploads%2Fgit-blob-be962a7b84986ca3f46a96624480d3915743edc1%2FIMG_5793%202.png?alt=media" alt="" width="375"><figcaption><p>Skynode S MIPI connectors side</p></figcaption></figure>

| LED     | State    | Meaning                                                     |
| ------- | -------- | ----------------------------------------------------------- |
| Blue    | On       | Flight controller communicating with the companion computer |
| Green   | On       | AuterionOS has finished booting.                            |
| All LED | Flashing | Device is thermal throttling.                               |

#### The LEDs on the other side indicate the status of the flight controller.

<figure><img src="https://3329189600-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FFW1Ge1p1f6WHyiYCb146%2Fuploads%2Fgit-blob-6cca1bf20f7d39c336f1c516db2088b7ccae0ca6%2FIMG_5792%202.png?alt=media" alt="" width="375"><figcaption><p>FMU side</p></figcaption></figure>

| LED   | State                                            | Meaning                                            |
| ----- | ------------------------------------------------ | -------------------------------------------------- |
| Green | On                                               | Flight controller power is on.                     |
| Red   | On (during boot)                                 | FRAM mounting failed or a hard fault occurred.     |
| Red   | Blinking (after boot)                            | CPU or RAM overload detected.                      |
| Blue  | Blinking (drone armed)                           | Failsafe mode activated.                           |
| Blue  | <p>Not blinking<br>(drone not armed)</p>         | Error state; there is an issue with the Commander. |
| Blue  | <p>Blinking every 100ms<br>(drone not armed)</p> | Not ready to arm.                                  |
| Blue  | <p>Blinking every 1s<br>(drone not armed)</p>    | Ready to arm.                                      |