javascript - 编写二进制文件Web串口api

Question

我正在使用 web 串行 api 来读取和写入串行端口。我能够读写。现在我的根文件夹中有一个 test.bin 文件。我需要直接将它发送到我的串口。这怎么可能？

    <?php
$file = fopen('test.bin', 'r');
$read = fread($file, filesize('test.bin'));
$value =  bin2hex($read);


?>
<input type="text" id="id" value="<?php echo $value; ?>" />


<script>
  var s = document.getElementById("id").value;
  var result = [];

  for (var i = 0; i < s.length; i += 2) {
    result.push(parseInt(s.substring(i, i + 2)));
  }
  result = Uint8Array.from(result);
  document.getElementById('log').innerHTML += result + "<br/>";


  console.log(result);
  button2.addEventListener('click', async () => {

    navigator.serial.requestPort().then(async (port) => {
      const textEncoder = new TextEncoderStream();
      const writableStreamClosed = textEncoder.readable.pipeTo(port.writable);
      const writer = textEncoder.writable.getWriter();



      await writer.write(result);

    })

  })