> 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/flight-controller/ark-pi6x-flow/flashing-guide/pi-cm4-lite-with-micro-sd.md).

# Pi CM4 Lite with Micro SD

When using a Pi CM4 Lite without EMMC, a micro SD must be used for the OS. Follow the normal steps for flashing a micro SD using the Raspberry Pi Imager.

{% embed url="<https://www.raspberrypi.com/software/>" %}

If using Ubuntu:

```
wget -O pi_imager.deb https://downloads.raspberrypi.org/imager/imager_latest_amd64.deb && sudo dpkg -i pi_imager.deb && rm pi_imager.deb
```

{% hint style="warning" %}
Select **Raspberry Pi OS (Legacy, 64-bit)**, which is based on Debian Bookworm. ARK-OS has only been tested against Bookworm; newer Raspberry Pi OS releases based on Debian Trixie are not yet verified.
{% endhint %}

Apply OS customization to configure WiFi and enable SSH:

* Set the default hostname:

```
pi6x
```

* Set the Wifi:\
  It is recommended to add a Dummy Wifi to turn on the Wifi radio, it does not have to be a reachable/ functioning network.\
  Otherwise it can be turned on using the following command once you have ssh-d to the Pi using the debug port. This command is automatically applied once you install ARK OS, to clone ARK OS you either need Wifi or Ethernet connected to the board.

```
sudo nmcli radio wifi on
```

* Set the default **username (pi)** and **password (pi)**
* Enable SSH

<figure><img src="/files/FbhVfNfcfkHHNeapKaA0" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/apdAXEwy5wDJ0W2riuGj" alt=""><figcaption></figcaption></figure>

After flashing the SD card is complete, you will need to modify the **/boot/config.txt** file on the SD card before installing it into the Pi. See [**After Flashing, Before Installing**](/products/flight-controller/ark-pi6x-flow/flashing-guide/after-flashing-before-installing.md)**.**


---

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