> For the complete documentation index, see [llms.txt](https://docs.arkelectron.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.arkelectron.com/products/embedded-computers/ark-just-a-pi/getting-started.md). # Getting Started ## What's Pre-Installed Bundles that include a CM5 ship pre-imaged: * **OS**: Raspberry Pi OS (64-bit) with the carrier configuration baked in and [ARK-OS](https://github.com/ARK-Electronics/ARK-OS) pre-installed * **Credentials**: Username `pi`, password `raspberry`, hostname `just-a-pi` {% hint style="info" %} The default password is well known — change it (`passwd`) before putting the device on a network you don't control. {% endhint %} If you are installing your own Compute Module, follow the [Flashing Guide](/products/embedded-computers/ark-just-a-pi/flashing-guide.md) first. ## Connecting ### Option 1: WiFi Hotspot On first boot, if no known WiFi network is available, the Pi brings up a hotspot: * **Network**: `just-a-pi-` * **Password**: `password` Connect to the hotspot, open , and join your WiFi network from the **Connections** page:

ARK-UI Connections page

Once the Pi is on your network: ```bash ssh pi@just-a-pi.local ``` If mDNS is not available on your network, use the Pi's IP address instead. ### Option 2: Ethernet Plug either Ethernet port into your network. The Pi requests an address over DHCP. You can use an [ARK Ethernet Adapter](/products/accessories/ark-ethernet-adapter.md) to get an RJ45 jack. ### Option 3: Serial Debug Console The **UART0 Debug** connector (6-pin JST-GH) exposes the Compute Module's serial console at 3.3V. Connect a 3.3V USB-to-serial adapter to reach the console before the network is configured. See the [Pinout](/products/embedded-computers/ark-just-a-pi/hardware.md#pinout) for the connector pin assignments. ## ARK-UI Web Interface ARK-OS hosts a web UI at for managing the device: system info, network connections, services, and video streaming. See [ARK-OS](/products/embedded-computers/ark-just-a-pi/using-ark-os.md). ## Next Steps * [ARK-OS](/products/embedded-computers/ark-just-a-pi/using-ark-os.md) – The pre-installed services and web UI * [Flashing Guide](/products/embedded-computers/ark-just-a-pi/flashing-guide.md) – Image the Compute Module * [Hardware Reference](/products/embedded-computers/ark-just-a-pi/hardware.md) – Specifications, pinout and block diagram --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.arkelectron.com/products/embedded-computers/ark-just-a-pi/getting-started.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. 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.