# Getting Started

## What's Pre-Installed

When you order an ARK Jetson PAB Carrier bundle, everything comes pre-flashed:

* **Flight Controller**: Latest PX4 stable firmware
* **Jetson**: Latest ARK kernel + ARK-OS (bundle purchases)
* **Credentials**: Username `jetson`, password `jetson`

## Important: Custom Kernel Required

{% hint style="warning" %}
The ARK Jetson PAB Carrier requires a custom device tree to enable all hardware features. If you reflash your Jetson, you must use the ARK kernel with the correct device tree.
{% endhint %}

Device tree files: <https://github.com/ARK-Electronics/ark_jetson_kernel/tree/main/device_tree/ark_pab>

See the [Flashing Guide](/products/flight-controller/jetson-pabs/ark-jetson-pab-carrier/flashing-guide.md) for complete instructions.

## WiFi Setup

### MHF4 Antenna Cables (Not Included)

{% hint style="info" %}
MHF4 to RP-SMA antenna cables are required for WiFi and are not included. You can purchase compatible cables from Amazon:

* [Option 1: 2-Pack MHF4 to RP-SMA](https://www.amazon.com/female-Pigtail-Antenna-Extension-wireless/dp/B07GTL2G69)
* [Option 2: 2-Pack MHF4 to RP-SMA (alternate)](https://www.amazon.com/dp/B076SGTMFS)
  {% endhint %}

### First Boot: WiFi Hotspot

On first boot, if no known WiFi network is found, the Jetson will create a hotspot:

* **Network**: `jetson-<serial>`
* **Password**: `password`

Connect to the hotspot, then open a web browser and go to <http://jetson.local> to configure your WiFi network.

<figure><img src="/files/QT0dPpndBMOmL9wJ9UKQ" alt=""><figcaption></figcaption></figure>

After clicking **Apply**, reconnect to your local network and refresh the page.

## Connecting to Your Jetson

### Option 1: SSH over WiFi

Once connected to the same network as your Jetson:

```bash
ssh jetson@jetson.local
```

If mDNS is not working on your network, use the Jetson's IP address directly.

### Option 2: Via Micro USB

{% hint style="danger" %}
**Micro USB + Flight Controller Conflict**

The Micro USB port is muxed with the Flight Controller USB connection. When Micro USB is connected:

* The Flight Controller is **disconnected** from the Jetson
* MAVLink routing and other FC-dependent services will not work
* You **MUST reboot** after disconnecting Micro USB to restore FC connectivity

See [Micro USB Console](/products/flight-controller/jetson-pabs/ark-jetson-pab-carrier/micro-usb-console.md) for more details.
{% endhint %}

When connected via Micro USB, the Jetson appears as a USB network device:

* PC IP: `192.168.55.100`
* Jetson IP: `192.168.55.1`

```bash
ssh jetson@192.168.55.1
```

## ARK-UI Web Interface

ARK-UI provides a web interface for managing your Jetson. Access it at <http://jetson.local>.

From ARK-UI you can:

* Configure WiFi networks
* Manage ARK-OS services
* Update flight controller firmware
* View system logs

<figure><img src="/files/cT7z1zp5Ql6M7PibmxdW" alt="" width="516"><figcaption></figcaption></figure>

## Next Steps

* [ARK Services](/products/flight-controller/jetson-pabs/ark-jetson-pab-carrier/ark-services.md) - Learn about the pre-installed ARK-OS services
* [Autopilot Connections](/products/flight-controller/jetson-pabs/ark-jetson-pab-carrier/autopilot-connections.md) - Connect QGroundControl or MissionPlanner
* [Flashing Guide](/products/flight-controller/jetson-pabs/ark-jetson-pab-carrier/flashing-guide.md) - Update or reflash your Jetson


---

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