Arduino蓝牙小车的代码

Arduino蓝牙小车的代码主要分为两部分：Arduino板子的代码和手机APP的控制代码。

Arduino板子的代码主要负责读取蓝牙信号，并根据信号来控制小车的动作，以下是一个简单的示例代码：

int leftMotorPin1 = 8; //左电机引脚1
int leftMotorPin2 = 9; //左电机引脚2
int rightMotorPin1 = 10; //右电机引脚1
int rightMotorPin2 = 11; //右电机引脚2

void setup() {
  pinMode(leftMotorPin1, OUTPUT);
  pinMode(leftMotorPin2, OUTPUT);
  pinMode(rightMotorPin1, OUTPUT);
  pinMode(rightMotorPin2, OUTPUT);
  Serial.begin(9600); //设置串口通信波特率为9600
}

void loop() {
  if (Serial.available() > 0) { //如果串口接收到数据
    int command = Serial.read(); //读取数据
    switch (command) {
      case 'F': //前进
        digitalWrite(leftMotorPin1, HIGH);
        digitalWrite(leftMotorPin2, LOW);
        digitalWrite(rightMotorPin1, HIGH);
        digitalWrite(rightMotorPin2, LOW);
        break;
      case 'B': //后退
        digitalWrite(leftMotorPin1, LOW);
        digitalWrite(leftMotorPin2, HIGH);
        digitalWrite(rightMotorPin1, LOW);
        digitalWrite(rightMotorPin2, HIGH);
        break;
      case 'L': //左转
        digitalWrite(leftMotorPin1, LOW);
        digitalWrite(leftMotorPin2, HIGH);
        digitalWrite(rightMotorPin1, HIGH);
        digitalWrite(rightMotorPin2, LOW);
        break;
      case 'R': //右转
        digitalWrite(leftMotorPin1, HIGH);
        digitalWrite(leftMotorPin2, LOW);
        digitalWrite(rightMotorPin1, LOW);
        digitalWrite(rightMotorPin2, HIGH);
        break;
      case 'S': //停止
        digitalWrite(leftMotorPin1, LOW);
        digitalWrite(leftMotorPin2, LOW);
        digitalWrite(rightMotorPin1, LOW);
        digitalWrite(rightMotorPin2, LOW);
        break;
      default:
        break;
    }
  }
}

手机APP的代码主要负责通过蓝牙与Arduino板子进行通信，并发送控制指令。以下是一个简单的Android APP示例代码：

public class MainActivity extends AppCompatActivity {

    private BluetoothAdapter bluetoothAdapter;
    private BluetoothSocket bluetoothSocket;
    private OutputStream outputStream;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if (bluetoothAdapter == null) {
            Toast.makeText(this, "不支持蓝牙", Toast.LENGTH_SHORT).show();
            finish();
            return;
        }

        if (!bluetoothAdapter.isEnabled()) {
            Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(intent, 1);
            return;
        }

        Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
        for (BluetoothDevice device : pairedDevices) {
            if (device.getName().equals("HC-06")) { //HC-06是蓝牙模块的名称，需要根据实际情况修改
                try {
                    bluetoothSocket = device.createRfcommSocketToServiceRecord(UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));
                    bluetoothSocket.connect();
                    outputStream = bluetoothSocket.getOutputStream();
                } catch (IOException e) {
                    Toast.makeText(this, "连接失败", Toast.LENGTH_SHORT).show();
                    finish();
                    return;
                }
                break;
            }
        }

        Button forwardButton = findViewById(R.id.forward_button);
        forwardButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sendCommand('F');
            }
        });

        Button backwardButton = findViewById(R.id.backward_button);
        backwardButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sendCommand('B');
            }
        });

        Button leftButton = findViewById(R.id.left_button);
        leftButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sendCommand('L');
            }
        });

        Button rightButton = findViewById(R.id.right_button);
        rightButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sendCommand('R');
            }
        });

        Button stopButton = findViewById(R.id.stop_button);
        stopButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sendCommand('S');
            }
        });
    }

    private void sendCommand(char command) {
        try {
            outputStream.write(command);
            outputStream.flush();
        } catch (IOException e) {
            Toast.makeText(this, "发送指令失败", Toast.LENGTH_SHORT).show();
            finish();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        try {
            if (bluetoothSocket != null) {
                bluetoothSocket.close();
            }
            if (outputStream != null) {
                outputStream.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}