# GoMobile Access QR Code Length

HTML version: [GoMobile Access QR Code Length](https://support.gladstonesoftware.cloud/kb/gomobile-access-qr-code-length)

## Problem
Some access control hardware (the hardware that reads a member's QR code at entry) only accepts QR codes up to a certain number of characters. GoMobile — Gladstone's consumer mobile app, see [GO Mobile in the glossary](../guides/glossary.md) — generates QR codes for member entry, but the standard QR code length may not be compatible with all types of hardware, especially older or non-standard systems.

## Resolution
1. **Check Hardware Compatibility**  
   Before you commit to GoMobile, check that your access control system is compatible with the standard QR code length.

2. **Standard QR Code Length**  
   The GoMobile app generates QR code values of 24 or 26 characters by default, which works with standard hardware installed by [ASP](../guides/glossary.md), a marketplace supplier of access control hardware.

3. **Alternative Configuration for QR Code Length**  
   If your access control hardware cannot accept the standard length:
   - Tell your Gladstone project manager during your implementation that you need an alternative QR code length (typically 16 characters).
   - Make sure this requirement is included in your project requirements.
   - Gladstone sets the chosen QR code length for your app. You do not need to change anything yourself.

4. **Changing QR Code Length After GoMobile Is Live**  
   - If you need to change the QR code length after your app is live, raise a case with Gladstone Support at [Raising a support case](../guides/raising-a-support-case.md).
   - A new app version/build will be required. The update must be reviewed and approved by Apple and Google, which can take up to 5 days.

## Notes
- QR codes are generated when the member accesses the entry page in the app and are refreshed every 2 months.
- If your app is already live, a new version build is required, as Google and Apple do not accept new builds of an existing version.