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* Minor updates/refinements [HC-1663]
* Improved [HC-1662]
* New article: Install the PLC runtime (HC-1638)
* Unpublish article [HC-1461]
Topic is out of scope for the Help Center for the foreseeable future.
* Updated and improved [HC-1299]
title: "Change the email address for your Arduino account"
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id: 360016466160
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---
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Learn how to change the email address associated with your Arduino account.
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> [!NOTE] If you created your account using a third-party sign-in option (Google, GitHub, or Apple), you won’t be able to change the associated email address.
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Follow the steps below to change the email address:
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1. Sign into [id.arduino.cc](https://id.arduino.cc/).
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1. In the Personal info tab, scroll down to the **Account settings** section.
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1. Click the **Edit** button under Account settings.
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1. Enter a new email address in the Email field.
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1. Click **Save settings**.
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1. An email will be sent to the new email address with instructions on how to confirm the change.
1. Open your email inbox and look for an email from **auth@arduino.cc** with the subject "Verify your email".
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> [!TIP]
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> If you don't see the email in your main inbox, please check the spam folder.
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1. Open the email and click the **Confirm Now** button to complete the account registration.
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You can review your account and configure your account on [the profile page](https://id.arduino.cc/).
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> [!WARNING]
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> Your account will be automatically deleted if your email is not verified. Please verify your email address to avoid losing access. If you need help, see [Verify your email address](https://support.arduino.cc/hc/en-us/articles/360016822039-Verify-your-email-address).
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---
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<h2id="sso">Sign up with SSO (Single Sign On)</h2>
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Alternatively, you can sign in using an identity provider such as Google or Facebook.
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1. Go to [arduino.cc](https://www.arduino.cc/) and click Sign In in the top-right to open the [sign-in page](https://login.arduino.cc/login).
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> [!NOTE]
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> If another account is signed in, click the  profile button and select 'Sign Out'.
Copy file name to clipboardExpand all lines: content/About Arduino/My Arduino Account/How-to-change-the-email-address-connected-to-the-Arduino-account.md
1. Open your system's command line application inside the extracted folder.
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***Windows:** Hold <kbd>⇧Shift</kbd> and right-click any blank space inside the extracted folder. In the context menu, select **Open command window here / Open PowerShell window here**.
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***macOS:** Control-click on the extracted `unor4wifi-update-macos` folder and select "**New Terminal at Folder**" from the context menu. A terminal window will open.
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***macOS:** Control-click on the extracted `unor4wifi-update-macos` folder and select "**Services > New Terminal at Folder**" from the context menu. A terminal window will open.
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***Linux:** Open [a command line terminal](https://ubuntu.com/tutorials/command-line-for-beginners) in the extracted folder.
> If you're using macOS, you may need to adjust your system's security settings to allow this command if you encounter a warning pop-up. To proceed, go to _System Settings > Privacy & Security_, and under _Security_, click _Allow Anyway_ to allow espflash to run.
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> If you're using macOS, you may need to adjust your system's security settings to allow this command if you encounter a warning pop-up. In the System Settings app, select _Privacy & Security_ and scroll down to the _Security_ section. Click _Allow Anyway_ to allow espflash to run, and repeat the previous step.
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1. The terminal window might now show a list of the serial ports present on your computer. Use the arrow keys on your keyboard to select the port for the board and then press the <kbd>**Enter**</kbd> key.
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***Windows:** The board will have a name like "USB Serial Device".
@@ -67,5 +69,5 @@ Follow these steps:
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1. Close the terminal window.
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1. Disconnect the USB cable of the **UNO R4 WiFi** board from your computer.
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1. Ensure that the Download pin is no longer shorted.
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1. Ensure that the Download and GND pins are no longer shorted.
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1. Connect the **UNO R4 WiFi** board to your computer with the USB cable again.
Copy file name to clipboardExpand all lines: content/Software Support/IDE Settings/Modify-the-buffer-size-of-the-Wire-library.md
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title: "Modify the buffer size of the Wire library"
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id: 4406686928786
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draft: true
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The Wire library is used to communicate with I2C/TWI devices. Being able to change/modify it’s buffer size is very useful for I2C/TWI device communication.
The **PLC runtime** runs on your PLC device and enables the Arduino PLC IDE to communicate with it. Learn how to install the PLC runtime on your device.
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---
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> [!TIP]
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> Arduino PLC IDE lists only the COM port number for each connected device. Disconnect any unused USB devices and restart Arduino PLC IDE to make it easier to select the right port.
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Follow these steps:
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1. Create or open a project in PLC IDE.
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1. Find the **Device configuration** panel:
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1. If necessary, scroll down inside the configuration panel until you see the "**Other**" section:
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1. Select the serial port for your device.
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- If mulitple ports are available, try the one with the lower COM port number first.
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- If you need help, see [Identify the serial ports of your PLC device](https://support.arduino.cc/hc/en-us/articles/16724283965596-Identify-the-serial-ports-of-your-PLC-device).
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1. Click the **Download** button.
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1. The runtime will be compiled and uploaded to the target device.
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1. The process is complete when a line like this appears in the Resources tab of the **Output** panel:
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