> For the complete documentation index, see [llms.txt](https://docs.lyzi.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lyzi.io/en/faq/application-et-terminaux/lapplication-lyzi-pro-scan-me-demande-de-scanner-un-qr-code-au-demarrage.md).

# The Lyzi Pro Scan app asks me to scan a QR code at startup

### The signal

At startup, the Lyzi Pro Scan app displays **"You are not connected to a cash register, please scan a cash register code"** and opens the camera: **the app is disconnected.**

### The cause

**30 days of continuous inactivity.** If the app isn't opened for 30 days in a row, it disconnects from the cash register.

{% hint style="success" %}
**To avoid this:** launch the app from time to time, even without a payment.
{% endhint %}

### To reconnect it

1. Get the cash register's QR code:
   * either the manager finds it in the back office: **Point of sale and cash registers** › **Cash register** › **•••** (three small dots) › **Synchronize with the Lyzi Pro Scan app**;
   * or you ask Lyzi for the new QR code.
2. **Scan this QR code with the Lyzi Pro Scan app.**

### Expected result

The app displays the amount entry screen again. You can accept payments.

### Questions covered

* "The app asks me to scan a QR code"
* "You are not connected to a cash register"
* "The Lyzi app is disconnected"
* "How do I reconnect the app?"
* "Where can I find the QR code to reconnect my cash register?"
* "The app no longer works after the holidays"


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