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# Examples


The [start/1](`tftp:start/1`) function starts a daemon process listening for UDP
packets on a port. When it receives a request for read or write, it spawns a
temporary server process handling the transfer.

This is a simple example of starting the TFTP server and reading the content of
a sample file using the TFTP client.

_Step 1._ Create a sample file to be used for the transfer:

```text
      $ echo "Erlang/OTP 21" > /tmp/file.txt
```

_Step 2._ Start the TFTP server:

```erlang
      1> Callback = {callback,{"",tftp_file,[{root_dir,"/tmp"}]}}.
      2> {ok, Pid} = tftp:start([{port, 19999}, Callback]).
      {ok,<0.65.0>}
```

_Step 3._ Start the TFTP client (in another shell):

```erlang
      1> tftp:read_file("file.txt", binary, [{port, 19999}]).
      {ok,<<"Erlang/OTP 21\n">>}
```
