> For the complete documentation index, see [llms.txt](https://c-shengwen-tw.gitbook.io/ncrl-flight-controller/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://c-shengwen-tw.gitbook.io/ncrl-flight-controller/guide/rgb-led-indicator.md).

# RGB LED indicator

### Error states

| Color and frequency | Meaning                     |
| ------------------- | --------------------------- |
| Purple (static)     | Calibration required        |
| Red (blinking)      | Remote controller not reset |

### Normal states

| Color and frequency | Meaning                                |
| ------------------- | -------------------------------------- |
| Red (static)        | UAV armed, localization not present    |
| Dark blue (static)  | UAV disarmed, localization not present |
| Orange (static)     | UAV armed, localization present        |
| Light blue (static) | UAV disarmed, localization present     |