# `Modbuv.Tcp`
[🔗](https://github.com/ultra0224/modbuv/blob/v0.1.0/lib/modbuv/tcp.ex#L1)

Modbus TCP ADU framing: MBAP header plus the Codec PDU.

# `pack_exception`

```elixir
@spec pack_exception(0..255, 1..127, atom(), 0..65535) :: binary()
```

Encodes a Modbus exception response into a TCP ADU for the given slave, function code, reason, and transaction ID.

# `pack_req`

```elixir
@spec pack_req(tuple(), 0..65535) :: binary()
```

Packs a Modbus TCP request ADU (MBAP header + PDU). `transid` is the transaction identifier (0–65535).

# `pack_res`

```elixir
@spec pack_res(tuple(), list() | nil, 0..65535) :: binary()
```

Encodes a frame tuple and its response values into a Modbus TCP response ADU using the given transaction ID.

# `parse_req`

```elixir
@spec parse_req(binary(), map()) ::
  {:ok, tuple(), 0..65535} | {:error, atom(), integer() | nil}
```

Parses a Modbus TCP request ADU binary using the given fc_map. Returns `{:ok, frame, transid}` on success or `{:error, reason, fc}` on failure.

# `parse_res`

```elixir
@spec parse_res(tuple(), binary()) :: list() | nil | {:error, term()}
```

# `split_adus`

```elixir
@spec split_adus(binary()) :: {[binary()], binary()}
```

---

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