# `Common.Message.ParamExtRequestRead`
[🔗](https://github.com/fancydrones/xmavlink/blob/main/lib/common.ex#L10457)

# `t`

```elixir
@type t() :: %Common.Message.ParamExtRequestRead{
  param_id: [char()],
  param_index: XMAVLink.Types.int16_t(),
  target_component: XMAVLink.Types.uint8_t(),
  target_system: XMAVLink.Types.uint8_t()
}
```

Request to read the value of a parameter with either the param_id string id or param_index. PARAM_EXT_VALUE should be emitted in response.

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*Consult [api-reference.md](api-reference.md) for complete listing*