> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/kalipso/5.0/developing/form/controls/events/scanner-trigger-pressed.md).

# Scanner Trigger Pressed

Kalipso - Form - Controls  - Events - Scanner Trigger Pressed

This Event is triggered when the scanner trigger is pressed

{% hint style="info" %}
This event is for Zebra, NordicID and Cipherlab.

* Zebra - it is available in Windows CE/Mobile and Android. In order for this event to work a call to ZebraScanConnect or ZebraRFIDConnect actions must be called. If you call ZebraScanConnect and after ZebraScanDisconnect, the event will continue to work.
* NordicID - it is available for Android only. In order for this event to work a call to NordicIDNURConnect action must be called. If you disconnect this will event stop working.
* Cipherlab - it is available for Android only. In order for this event to work a call to RFIDConnect action must be called. If you disconnect this will event stop working.
  {% endhint %}

#### Event available on the following operating systems

![](https://3821468174-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LrTlA1suFa5N48x_83N%2F-MGIW3wIXgRupIGNu8-p%2F-MGIiDGuNcrVFP-DbUma%2FTodos.PNG?alt=media\&token=406123c5-e2bb-4ec6-8044-9533b8686f6f)