按照Electron官网的示例，去连接蓝牙
https://www.electronjs.org/docs/latest/tutorial/devices#web-bluetooth-api

如果想要开启软件，就连接蓝牙，会报错:
Uncaught (in promise) DOMException: Failed to execute 'requestDevice' on 'Bluetooth': Must be handling a user gesture to show a permission request.

可以使用如下方法，去模拟用点击操作，以绕过Chrome的安全限制：
mainWindow.webContents.executeJavaScript(document.getElementById("clickme").click();,true );

修改后的main.js如下：

const { app, BrowserWindow, ipcMain } = require('electron')
const path = require('path')

app.commandLine.appendSwitch('enable-features', 'ElectronSerialChooser')

let bluetoothPinCallback
let selectBluetoothCallback

function createWindow () {
  const mainWindow = new BrowserWindow({
    width: 1600,
    height: 600,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js')
    }
  })

  mainWindow.webContents.openDevTools();

  mainWindow.webContents.on('select-bluetooth-device', (event, deviceList, callback) => {
    event.preventDefault()
    selectBluetoothCallback = callback
    const result = deviceList.find((device) => {
      console.log("======>" + device.deviceName)
      return device.deviceName === 'Phoenix Neo 2'
    })
    
    if (result) {
      callback(result.deviceId)
    } else {
      // The device wasn't found so we need to either wait longer (eg until the
      // device is turned on) or until the user cancels the request
    }
  })

  ipcMain.on('cancel-bluetooth-request', (event) => {
    selectBluetoothCallback('')
  })

  // Listen for a message from the renderer to get the response for the Bluetooth pairing.
  ipcMain.on('bluetooth-pairing-response', (event, response) => {
    console.log("bluetooth-pairing-response")
    bluetoothPinCallback(response)
  })

  mainWindow.webContents.session.setBluetoothPairingHandler((details, callback) => {
    console.log("bluetooth-pairing-request")
    bluetoothPinCallback = callback
    // Send a message to the renderer to prompt the user to confirm the pairing.
    mainWindow.webContents.send('bluetooth-pairing-request', details)
  })

  mainWindow.loadFile('index.html')

  mainWindow.webContents
    .executeJavaScript(`document.getElementById("clickme").click();`,true );
}

app.whenReady().then(() => {
  createWindow()

  app.on('activate', function () {
    if (BrowserWindow.getAllWindows().length === 0) createWindow()
  })

})

app.on('window-all-closed', function () {
  if (process.platform !== 'darwin') app.quit()
})


function handleIPC(win) {
  win.webContents.send('do-some-render-work');
}