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# PI Electronique (Elyx) - Connect POS

> ✨ **New recommended method:** We recommend using the [PI Electronique Connector (Elyx)](https://support.haddock.app/en/article/pi-electronique-connector-elyx-new-and-recommended-163zjcl/). It connects to haddock without complications, just works, and automatically syncs your POS data to haddock almost in real time.

1. Click your **restaurant name** to open the **menu**.

2. Go to **Restaurant settings** > **My integrations**.

3. In the integrations list, find **PI Electronique (Elyx)**.

4. **Request the necessary data** for the integration from your PI Electronique reseller or **contact our support chat**.

**Server URL** (public URL with port): the public address of your PI Electronique server. Example: `http://203.0.113.50:8082`.

**Access key** (API Key): the key that authorizes the connection with the PI Electronique API. If you do not have it, request it from your PI Electronique reseller.

**Location IDs** (optional): if you have several locations configured in PI Electronique and only want to sync some of them, enter their identifiers separated by commas. Example: `1,2,3`. If you leave the field empty, all locations sync.

5. Click **Connect**.

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## ⚙️ Technical requirements

* The PI Electronique server must be **powered on and reachable** from the internet (or from haddock's network).
* **You must have a fixed IP at the location.** If you do not have one, you can arrange it with your internet provider.
* The PI Electronique server port (default 8082) must be **open and forwarded** on the router.
* The PI Electronique REST API must be enabled in the POS configuration.

*Integrations may include additional costs not covered by haddock.*

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## ❓ Frequently asked questions

### I do not see sales in haddock after connecting

Check that the PI Electronique server is powered on and that you can open the server URL in a browser. If the URL does not respond, review the router configuration (port forwarding) or contact your PI Electronique reseller.

### The connection fails with an authentication error

Verify that the **API Key** you entered is correct. If you lost it or are unsure, request a new one from your PI Electronique reseller.

### Sales totals do not exactly match PI Electronique reports

PI Electronique groups invoices by work shift. Around shift or day changes, some tickets may be counted in a different shift depending on the report criteria. No data is lost: if you add together two consecutive shifts in both systems, the totals match.

### I only want to sync some locations

Enter the identifiers of the locations you want to sync in **Location IDs**, separated by commas (for example: `1,3`). If you leave the field empty, all locations sync.