JS调用蓝牙串口连接4.0以上的版本方法，请指教

if(device==null){
main = plus.android.runtimeMainActivity();
BluetoothAdapter = plus.android.importClass("android.bluetooth.BluetoothAdapter");
UUID = plus.android.importClass("java.util.UUID");
uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
BAdapter = BluetoothAdapter.getDefaultAdapter();
device = BAdapter.getRemoteDevice(mac_address);
plus.android.importClass(device);
bluetoothSocket = device.createInsecureRfcommSocketToServiceRecord(uuid);
plus.android.importClass(bluetoothSocket);
}
if (!bluetoothSocket.isConnected()) {
console.log('检测到设备未连接，尝试连接....');
bluetoothSocket.connect();
}
尝试连接蓝牙时，会报错Uncaught java.io.IOException: read failed, socket might closed or timeout, read ret: -1;at android.bluetooth.BluetoothSocket.connect at index.html:1，经搜集资料可能时蓝牙版本问题。不知道有什么方法可以解决。请各位朋友指点。谢谢！