androidstudio没有蓝牙模块

Posted 2023-04-11

参考技术A androidstudio连接步骤如下：
1、设置权限。
2、客户端开启蓝牙。
3、注册搜索蓝牙receiver。
4、客户端请求连接。
5、服务器端开启蓝牙，服务器端等待连接即可。

如何简单地将字符串从 android studio (kotlin) 传递到 arduino 串行蓝牙模块 (HC-05)？

【中文标题】如何简单地将字符串从 android studio (kotlin) 传递到 arduino 串行蓝牙模块 (HC-05)？

【英文标题】：How to simply pass a string from android studio (kotlin) to arduino serial bluetooth module (HC-05)?

【发布时间】：2019-07-03 02:43:27

【问题描述】：

我正在使用 Android Studio (

Kotlin

) 为学校项目制作一个 Android 应用。 我需要通过 HC-05 蓝牙模块向 Arduino Genuino Uno 模块发送

字符串

。 当应用程序启动时，Arduino 已经连接（配对）到我的 Android 设备。 谁能帮我找到一个正确且简单的方法来

只发送这些数据

？ 非常感谢。

【问题讨论】：

你可以使用类似 ***.com/questions/22899475/… 的东西，它是用 Java 编写的，但可以提供帮助。

谢谢，我试试这个。

【参考方案1】：

我终于得到了答案，我做到了：

private fun CheckBt() 
    Toast.makeText(applicationContext, "It has started", Toast.LENGTH_SHORT).show()
    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter()

    if (!mBluetoothAdapter.enable()) 
        Toast.makeText(applicationContext, "Bluetooth Disabled !", Toast.LENGTH_SHORT).show()
        /* It tests if the bluetooth is enabled or not, if not the app will show a message. */
        finish()
    

    if (mBluetoothAdapter == null) 
        Toast.makeText(applicationContext, "Bluetooth null !", Toast.LENGTH_SHORT).show()
    


fun Connect() 

    val device = mBluetoothAdapter.getRemoteDevice("98:D3:32:71:17:DE")
    Log.d("", "Connecting to ... $device")
    Toast.makeText(applicationContext, "Connecting to ... $device.name mac: $device.uuids[0] address: $device.address", Toast.LENGTH_LONG).show()
    mBluetoothAdapter.cancelDiscovery()
    try 
        btSocket = device.createRfcommSocketToServiceRecord(myUUID)
        /* Here is the part the connection is made, by asking the device to create a RfcommSocket (Unsecure socket I guess), It map a port for us or something like that */
        btSocket.connect()
        Log.d("", "Connection made.")
        Toast.makeText(applicationContext, "Connection made.", Toast.LENGTH_SHORT).show()
     catch (e: IOException) 
        try 
            btSocket.close()
         catch (e2: IOException) 
            Log.d("", "Unable to end the connection")
            Toast.makeText(applicationContext, "Unable to end the connection", Toast.LENGTH_SHORT).show()
        

        Log.d("", "Socket creation failed")
        Toast.makeText(applicationContext, "Socket creation failed", Toast.LENGTH_SHORT).show()
    

    //beginListenForData()
    /* this is a method used to read what the Arduino says for example when you write Serial.print("Hello world.") in your Arduino code */


private fun writeData(data: String) 
    var outStream = btSocket.outputStream
    try 
        outStream = btSocket.outputStream
     catch (e: IOException) 
        //Log.d(FragmentActivity.TAG, "Bug BEFORE Sending stuff", e)
    
    val msgBuffer = data.toByteArray()

    try 
        outStream.write(msgBuffer)
     catch (e: IOException) 
        //Log.d(FragmentActivity.TAG, "Bug while sending stuff", e)