> For the complete documentation index, see [llms.txt](https://developer.magtek.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/dynaprox/documents/programmers-manuals/programmers-manual-commands/commands/user-interface/buzzer.md).

# Buzzer

## Command 0x1805 - Buzzer

The host uses this command to start a buzzer for playing a sequence of tones. Each sequence can have a minimum of 1 to maximum of 10 tones.

{% stepper %}
{% step %}
The sequence of events is as follows:

* The host ensures the device is not currently running another command, for example, that it is not running a transaction using **Command 0x1001 - Start Transaction**.
  {% endstep %}

{% step %}

* The host composes a command request in the format below and sends it to the device.
  {% endstep %}

{% step %}

* The device plays a specific tone sequence as the command specified. After finish, the device sends **Notification 0x1805 - User Interface Operation Complete** to report Buzzer/Buzzer Result.

The host should wait for **Notification 0x1805 - User Interface Operation Complete** before sending another command.
{% endstep %}
{% endstepper %}

{% hint style="warning" %}
If the buzzer is currently playing a sequence of tones and any transaction that uses the buzzer to make a sound is started, the device will stop the buzzer for that transaction to take over.
{% endhint %}

## Table - Request Data for Command 0x1805 - Buzzer

<table><thead><tr><th>Tag</th><th width="75.33331298828125">Len</th><th width="263.33331298828125">Value / Description</th><th width="78">Typ</th><th width="73.33331298828125">Req</th><th width="96.6666259765625">Default</th></tr></thead><tbody><tr><td>Beginning of any wrappers, at minimum including <strong>Request Message</strong></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>1805 = <strong>Command 0x1805 - Buzzer</strong></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>81</td><td>N*4</td><td><p>N = Number of tones</p><ul><li>0x01 – Min (1 tone)</li><li>0x0A – Max (10 tones)</li></ul><p>4 = 4 bytes data parameter for each tone in the sequence Byte0-Byte1 – Frequency in units of 1 Hz</p><ul><li>0x0000..0x0031 (&#x3C; 50 Hz, Silent)</li><li>0x0032 - Min (50 Hz)</li><li>0x0FA0 - Max (4000 Hz)</li><li>0x0FA1..0xFFFF (> 4000 Hz, Error)</li></ul><p>Byte 2-Byte3 – Duration of tone in units of 1 millisecond</p></td><td>B</td><td>R</td><td></td></tr><tr><td></td><td></td><td><ul><li>0x0001 – Min (1 ms)</li><li>0xFFFF – Max (65535 ms)</li></ul></td><td></td><td></td><td></td></tr><tr><td>End of any wrappers, at minimum including <strong>Request Message</strong></td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table>

## Table - Response Data for Command 0x1805 - Buzzer

<table><thead><tr><th>Tag</th><th width="73.66668701171875">Len</th><th width="167">Value / Description</th><th width="75.3333740234375">Typ</th><th width="74">Req</th><th width="96.6666259765625">Default</th></tr></thead><tbody><tr><td>Beginning of any wrappers, at minimum including <strong>Response Message</strong> </td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>1805 = <strong>Command 0x1805 - Buzzer</strong></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>No parameters.</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>End of any wrappers, at minimum including <strong>Response Message</strong> </td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table>

## Table - Request Example for a sequence of 5 tones

{% code title="Example (Hex)" %}

```
AA00 810401031805 8418 1805 8114 00C8 01F4 0190 01F4 0258 01F4 0190 01F4 00C8 01F4
```

{% endcode %}

## Table - Response Example

{% code title="Example (Hex)" %}

```
AA00 810482031805 820401000000
```

{% endcode %}


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