# `IEC60870.LinkLayerParameters`
[🔗](https://github.com/Ultraluv/ex_iec60870/blob/main/lib/iec60870/link_layer_parameters.ex#L1)

Serial link layer parameters for IEC 60870-5-101.
Corresponds to `sLinkLayerParameters` in `lib60870-C`.

- `address_length`: Length of link layer address in bytes (1 or 2, default: 1)
- `timeout_for_ack`: Timeout for link layer ACK in ms (default: 200)
- `timeout_repeat`: Timeout for repeated message transmission when no ACK received in ms (default: 1000)
- `use_single_char_ack`: Use single character `0xE5` for ACK (`FC=0`) or `RESP_NO_USER_DATA` (`FC=9`) (default: true)
- `timeout_link_state`: Interval to repeat request status of link (`FC=9`) in ms (default: 5000)

# `t`

```elixir
@type t() :: %IEC60870.LinkLayerParameters{
  address_length: 0 | 1 | 2,
  timeout_for_ack: pos_integer(),
  timeout_link_state: pos_integer(),
  timeout_repeat: pos_integer(),
  use_single_char_ack: boolean()
}
```

# `new`

```elixir
@spec new(keyword()) :: t()
```

Creates a new LinkLayerParameters struct with optional custom overrides.

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