# LED indicator

| LED       | Color  | Description                       |
| --------- | ------ | --------------------------------- |
| Main led  | RGB    | Indicates the status of XBLink    |
| SYS led   | Green  | System led                        |
| LTE led   | Blue   | Status of the cellular connection |
| Power led | Yellow | On/Off                            |

![Main led](/files/-Ma70gUFR66pQ94bFh0l)

![SYS Led, LTE Led and POWER Led](/files/-Ma70JLwD0X9u0JtuNN0)

### 1.Main Led

| **Color** | Blink                                                         | Solid                                       |
| --------- | ------------------------------------------------------------- | ------------------------------------------- |
| Red       | Start up, Initializing                                        | Error                                       |
| Blue      | Trying to establish cellular network                          |                                             |
| Green     | XBFirm process is running - waiting the singal from Pilot App | All good - XBLink is connected to Pilot App |

> If the network cannot be connected, please check your hardware connection (SIM card status, antenna) and apn configuration, the current network environment.

### **2.SYS led**

* Blinks - Normal operation
* Solid - Firmware Upload

### **3. LTE led**

* When the connection is established and data is being transmitted/received, this led will blink at special intervals. Otherwise, if there is no connection, the led will remain off.

### **4.Power led**

* Light - Power is OK
* Off - No power input


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.xbstation.com/xblink-basic/xblink/led-indicator.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.