> For the complete documentation index, see [llms.txt](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general-functions-less-than-greater-than-luadoc-begin-general/getras.md).

# getRAS()

Return the RAS value or nil if no valid hardware found

@status current Introduced in 2.2.0

## Parameters

none

## Return value

* `number` representing RAS value. Value bellow 0x33 (51 decimal) are all ok, value above 0x33 indicate a hardware antenna issue. This is just a hardware pass/fail measure and does not represent the quality of the radio link

### Notice

RAS was called SWR in the past