> 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/documentation/actions/group-rfid/rfid-start-tag-locating.md).

# RFID Start Tag Locating

Start Tag Location based on the RSSI signal.

Action available for the following operating systems:

<figure><img src="https://1614058754-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJ5vDGuBZwhJDeu5Rq7Wt%2Fuploads%2Fgit-blob-4a8b1474a0373af72d0001d0c46012fe8e93fcfa%2F02_Supported_OS_android.png?alt=media" alt="OS Supported: Android"><figcaption></figcaption></figure>

### Parameters

* **User Parameters** *\<string>*
* **Apply Filter** *\<string>*
  * 1 - Yes
  * 2 - No<br>
* **Memory Bank** *\<string>*
  * -1 EPC ID Content
  * 0 Reserved
  * 1 EPC
  * 2 TID
  * 3 User<br>
* **Mask Value** *\<string> -* Hexadecimal.
* **Bit Position** *\<numeric> -* Index of the first Bit to apply mask.
* **Bit Lenght** *\<numeric> -* Number of Bits to use in the mask.