chrome.serial.update bug

gistfile1.txt

function convertArrayBufferToString(buf){
  var bufView = new Uint8Array(buf);
  var encodedString = String.fromCharCode.apply(null, bufView);
  return decodeURIComponent(encodedString);
}

var onReceiveCallback = function(info) {
  console.log('received', convertArrayBufferToString(info.data));
};

//convertStringToArrayBuffer('hello')
var convertStringToArrayBuffer=function(str) {
  var buf=new ArrayBuffer(str.length);
  var bufView=new Uint8Array(buf);
  for (var i=0; i<str.length; i++) {
    bufView[i]=str.charCodeAt(i);
  }
  return buf;
};

var onGetDevices = function(ports) {
  for (var i=0; i<ports.length; i++) {
    console.log(ports[i].path);
  }
};
console.log(chrome.serial.getDevices(onGetDevices));

var onConnect = function(connectionInfo) {

  console.log(chrome.runtime.lastError, connectionInfo);

  chrome.serial.onReceive.addListener(onReceiveCallback);

  var connectionId = connectionInfo.connectionId;
  
  var buffer = new ArrayBuffer(1);
  var dataView = new DataView(buffer);
  dataView.setInt8(0, 0xaa);
  
  chrome.serial.send(connectionId, buffer, function(){
    
      chrome.serial.update(connectionId, {bitrate: 9600}, function(result){
        console.log(chrome.runtime.lastError, result);

        chrome.serial.send(connectionId, buffer, console.log.bind(console));

      });
    
  });
};

chrome.serial.connect('/dev/tty.usbserial-A700eTSd', {bitrate: 200}, onConnect);