> For the complete documentation index, see [llms.txt](https://docs.mclimate.eu/mclimate-lorawan-devices/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mclimate.eu/mclimate-lorawan-devices/devices/mclimate-open-close-sensor-lorawan/open-close-sensor-lorawan-communication-protocol/event-notification.md).

# Event notification

## Open/Close event

With the command your application server can understand when there was an Open/Close event. This would let you trigger and actions in response. The command code is the same for the opening and for the closing event.

{% hint style="info" %}
The command is sent together with the keepalive of the device, where it replaces the keep-alive command byte.
{% endhint %}

<table data-header-hidden><thead><tr><th width="143.99999999999997"></th><th></th></tr></thead><tbody><tr><td><strong>Byte index</strong></td><td><strong>Received response</strong></td></tr><tr><td>0</td><td>20 – Command code</td></tr></tbody></table>

## Button push event

With the command your application server can understand when there was a Button push event. This would let you trigger and actions in response.

{% hint style="info" %}
The command is sent together with the keepalive of the device, where it replaces the keep-alive command byte.
{% endhint %}

<table data-header-hidden><thead><tr><th width="143.99999999999997"></th><th></th></tr></thead><tbody><tr><td><strong>Byte index</strong></td><td><strong>Received response</strong></td></tr><tr><td>0</td><td>21 – Command code</td></tr></tbody></table>


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