Android串口通信简单封装，可以用于和连接串口的硬件通信或者进行硬件调试
Step 1. Add the JitPack repository to your build file
//Add it in your root build.gradle at the end of repositories:
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
Step 2. Add the dependency
//Add the dependency
dependencies {
implementation 'com.github.tyhjh:SerialPortUtil:1.0.0'
}
读取文件权限应该是需要的
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>获取所有串口地址
String[] devicesPath = new SerialPortFinder().getDevicesPaths();
打开串口，设置读取返回数据超时时间
SerialPortService serialPortService = new SerialPortBuilder()
.setTimeOut(100L)
.setBaudrate(9600)
.setDevicePath("dev/ttyS4")
.createService();发送指令
//发送byte数组数据
byte[] receiveData = serialPortService.sendData(new byte[2]);
//发送16进制的字符串
byte[] receiveData = serialPortService.sendData("55AA0101010002");
Log.e("MainActivity：", ByteStringUtil.byteArrayToHexStr(receiveData));打开或者关闭日志,默认关闭
serialPortService.isOutputLog(true);//关闭串口
serialPortService.close();
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