> For the complete documentation index, see [llms.txt](https://guide.cronuszen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.cronuszen.com/zen-link/updating.md).

# Updating

{% hint style="info" %}
Zen Link™ firmware updates are delivered over Wi-Fi. No cable, no PC, and no app interaction is required.
{% endhint %}

### Automatic updates <a href="#automatic-updates" id="automatic-updates"></a>

Plug in your Zen Link™ so that it powers up. Once it has connected to your Wi-Fi network, the update starts automatically after about 30 seconds. You do not need to open the Zenlink App.

{% hint style="warning" %}
If your Wi-Fi credentials are not valid, the Zen Link™ starts BLE setup instead of updating. Configure Wi-Fi from the Zen Link™ App, then let it connect again.
{% endhint %}

***

### One-time V1 upgrade <a href="#v1-upgrade" id="v1-upgrade"></a>

{% hint style="warning" %}
**V1 only.** Run this once. After the upgrade, your Zen Link™ V1 has the same functionality as a V2 and updates automatically from then on.
{% endhint %}

{% stepper %}
{% step %}

#### Enter Config Mode

Plug the Zen Link™ V1 in while holding the blue Config button.
{% endstep %}

{% step %}

#### Run the updater

Open the **ZenLinkConfigurator**, enter your Wi-Fi credentials, and select **Native Mode**.
{% endstep %}

{% step %}

#### Wait for the update

Once the Zen Link™ has connected to Wi-Fi, the update starts shortly after.
{% endstep %}
{% endstepper %}

***

### ZenLinkConfigurator <a href="#zenlinkconfigurator" id="zenlinkconfigurator"></a>

Apart from the one-time upgrade above, the **ZenLinkConfigurator** is only needed on a V1 device after a Factory Reset. There is no other use for it.

{% hint style="info" %}
A factory reset on a V1 is a last resort for a unrecoverable unit and is not part of normal use.
{% endhint %}


---

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