> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso5/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/kalipso5/developing/form/actions/actions-description/group-rfid/nfc-tag-send-command.md).

# NFC Tag Send Command

Uses the device NFC antenna for sending a command and receiving the answer to HF tags when in close proximity.

Action available for the following operating systems:

![](/files/-MRyMmurYkr5sJQek1Ij)

### Parameters

* **Tag Type** numeric - The type of tags to write data. It can be one of:
  * 1 - **Mifare Classic**
  * 2 - **Mifare Ultralight**
  * 3 - **ISO 15693**
* **Coded** numeric - Specifies if the data to write and answer received are coded with ASCII codes enclosed in ‘<’ and ‘>’. This is useful for debugging. It can be one of:
  * 1 - **Yes**
  * 2 - **No**
* **Command** string - The command to send to the tag.
* **Target Answer** string - The target control or variable to store the command answer.

{% hint style="warning" %}
This action is currently only supported on Android.
{% endhint %}

{% hint style="info" %}
A part of Android documentation on the command parameter states:

* Applications must not append the EoD (CRC) to the payload, it will be automatically calculated.
* Applications must only send commands that are complete bytes, for example a SENS\_REQ is not possible (these are used to manage tag polling and initialization).
  {% endhint %}

{% hint style="info" %}
On Android, specifying **Tag Type = 0** allows to send a command for any tag type supported by Android.
{% endhint %}