# `Common.Message.ParamExtValue`
[🔗](https://github.com/fancydrones/xmavlink/blob/main/lib/common.ex#L10495)

# `t`

```elixir
@type t() :: %Common.Message.ParamExtValue{
  param_count: XMAVLink.Types.uint16_t(),
  param_id: [char()],
  param_index: XMAVLink.Types.uint16_t(),
  param_type: Common.Types.mav_param_ext_type(),
  param_value: [char()]
}
```

Emit the value of a parameter. The inclusion of param_count and param_index in the message allows the recipient to keep track of received parameters and allows them to re-request missing parameters after a loss or timeout.

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