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Commit 6fb87b0

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Merge pull request #2551 from arduino/mcmchris/nano-matter/user-manual-qr-code
[PXCT-1043] Nano Matter - User Manual - QR Section - How to change it
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‎content/hardware/03.nano/boards/nano-matter/tutorials/01.user-manual/content.md‎

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@@ -481,6 +481,56 @@ If you want to commission your Nano Matter solution with another service, follow
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***Be aware that the Matter integration for Home Assistant is still in BETA, it can receive major updates and its functionality may vary between different vendors.***
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### Updating the Commissioning QR Code
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Each Nano Matter board comes with a default QR code used for commissioning. In this section, you will learn how to **generate a unique QR code** for your device by updating its provisioning ID.
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![Unique QR Codes for your Matter devices](assets/new-qr-codes.png)
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By assigning a unique provisioning ID, you can:
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- Generate a distinct QR code for each board.
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- Commission multiple Nano Matter boards to the same network without conflicts.
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- Prepare your devices for real-world field deployment.
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#### Prerequisites
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Before starting, make sure you have the following:
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- Make sure the **Arduino IDE** and the **Silicon Labs Arduino Core** are both installed.
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- Make sure there is only **one** board connected to your computer at a time.
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- Your Matter sketch already flashed to the board.
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- Clone the [Arduino Matter Provision Tool](https://github.com/silabs-bozont/arduino_matter_provision) repository on your local machine.
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#### Changing the Provisioning ID
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To assign a new provisioning ID and generate a new QR code:
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- Open a terminal and navigate to the cloned `/arduino_matter_provision` folder.
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- The provisioning command has the following format:
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```bash
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python arduino_matter_provision.py <board_name> <config_number>
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```
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- Replace `<board_name>` with `nano_matter` and choose a configuration number (e.g., `1`):
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```bash
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python arduino_matter_provision.py nano_matter 1
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```
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- Run the script to change the provisioning data using the given structure.
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![Running the script](assets/qr-code-change.gif)
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Once the script finishes, open the **Arduino Serial Monitor**. You will see the updated commissioning credentials there, no need to re-upload the sketch.
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Here’s what the new credentials might look like:
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- Manual Pairing Code: `00417637863`
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- QR code URL: `https://project-chip.github.io/connectedhomeip/qrcode.html?data=MT%3A8YT00-D000CQ-01VB10`
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***Make sure all your Nano Matter boards has been configured with a different ID.***
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### Device Decommissioning
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If you have a Matter device configured and working with a _specific platform_, for example with the Google Home ecosystem, and you want to integrate it with Alexa or Apple Home instead, you need to decommission it first from the previous service.

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