USB-OTG-CH340-UART-interface
USB-OTG-CH340-UART-interface that is a library communication with USB convert uart, that module is ch340 model, it not need root of your phone.
License
Copyright (C) [2018] [x-sir, USB-OTG-CH340-UART-interface Open Source Project]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.