[PXCT-1397] Re-flashing UNO Q with a new image (arduino-flasher-cli)

content/hardware/02.uno/boards/uno-q/tutorials/04.update-image/update-image.md

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+---
+title: Flashing a New Image to the UNO Q
+description: Learn how to flash a new image (the Linux OS) to the UNO Q board using the Arduino Flasher CLI.
+tags: [UNO Q, Arduino]
+author: Karl Söderby
+---
+
+The [Arduino® UNO Q](https://store.arduino.cc/products/uno-q) runs a Linux operating system (OS), which comes pre-installed on the board.
+
+There is often no need to re-install the OS on your board (also known as flashing an image), as the OS automatically receives updates regularly.
+
+However, if we want to hard-reset the board and perform a fresh installation, it is possible. This process requires some additional tools installed on your machine.
+
+***Note that the instructions in this tutorial will wipe the board clean, and files & configurations saved on the board will be destroyed.***
+
+## Requirements
+
+### Hardware Requirements
+
+- [Arduino® UNO Q](https://store.arduino.cc/products/uno-q)
+- [USB-C® cable](https://store.arduino.cc/products/usb-cable2in1-type-c)
+- Female-to-female jumper wire
+
+### Software Requirements
+
+To re-flash the board, we will use the **Arduino Flasher CLI** tool:
+
+- Download the [Arduino Flasher CLI](https://www.arduino.cc/en/software/)
+
+***Note that this tool will download an image with a size that exceeds 1 GB. A stable Internet connection is recommended.***
+
+## Download & Install CLI Tool
+
+1. Download the [Arduino Flasher CLI](https://www.arduino.cc/en/software/) for your OS (MacOS / Linux / Windows)
+2. Unzip the downloaded file, (you will receive a executable binary named `arduino-flasher-fli`)
+
+### Verify Tool Is Installed
+
+Before flashing a new image, check that the `arduino-flasher-cli` tool is working. Below are instructions to verify the tool is installed and working on your OS.
+
+#### MacOS
+
+Navigate to the unzipped folder (e.g. `arduino-flasher-cli-x.x.x-darwin-arm64`), and run the following command:
+
+```
+./arduino-flasher-cli
+```
+
+You should see something like:
+
+![Output from testing tool (MacOS)](assets/macos.png)
+
+This means it is working, and we can proceed to [flashing the board](#flash-image-to-the-board).
+
+#### Linux
+
+Navigate to the unzipped folder (e.g. `arduino-flasher-cli-x.x.x-darwin-arm64`), and run the following command:
+
+```
+./arduino-flasher-cli
+```
+
+You should see something like:
+
+![Output from testing tool (Linux)](assets/linux.png)
+
+This means it is working, and we can proceed to [flashing the board](#flash-image-to-the-board).
+
+#### Windows
+
+Navigate to the unzipped folder (e.g. `arduino-flasher-cli-x.x.x-darwin-arm64`), and run the following command:
+
+```
+arduino-flasher-cli
+```
+
+A new window should appear, prompting you to install the driver. Install it, and run `arduino-flasher-cli` again in the terminal.
+
+![Output from testing tool (Windows)](assets/windows.png)
+
+This means it is working, and we can proceed to [flashing the board](#flash-image-to-the-board).
+
+## Preparing the Hardware
+
+To prepare the hardware for flashing, follow the instructions below:
+
+1. Disconnect the board from your computer.
+2. Add the female-to-female jumper cable between the two pins specified in the image:
+
+    ![Short the two pins](assets/flash-uno-q.png)
+
+3. Do **not** connect the board to the computer yet. This will need to be timed in the next step.
+
+## Flash Image to the Board
+
+In this step, we will upload the new image to the board using the Arduino Flasher CLI.
+
+1. Open a terminal and navigate to the directory where you unzipped the Arduino Flasher CLI (normally `/Downloads`).
+2. Type the following command in the terminal: `./arduino-flasher-cli flash latest` **but do not press Enter yet**
+3. **Connect the board to the computer**, and press **Enter** to run the command **during the boot animations** on the LED matrix (immediately after plugging in). You only need the jumper to force recovery at plug-in; **you may remove it after you run the command**.
+4. A download sequence will begin (the image is >1 GB). Once the download is complete, it will flash the board with the new image. **Please note:** this will take several minutes. Do **not** disconnect the USB cable during this process.
+5. Once flashing completes and the tool reports success, **power-cycle** the board (unplug and re-plug USB) so it boots the new OS. (Ensure the jumper is removed before the power-cycle.)
+
+***It is important to run the flashing command ONLY when the board is booting up; it does not work once the OS has finished booting.***
+
+
+## Troubleshooting
+
+- Ensure the Arduino Flasher CLI is unzipped and accessible.
+- Check that the correct pins are shorted, and that they are shorted **before** connecting the board to the computer.
+- Make sure the board has not finished booting when running the flashing command (`./arduino-flasher-cli flash latest`).
+- Verify that you are running the command from the correct directory where the Arduino Flasher CLI was unzipped.
+- After the tool reports a successful installation, **power-cycle** the board **with the jumper removed.**