手机通过蓝牙发送一个数组到stm32

要使用蓝牙发送数组到STM32，需要完成以下步骤：

1. 确认手机和STM32都支持蓝牙通信，并且已经成功连接。

2. 在STM32的代码中，使用USART或UART接口读取蓝牙数据。可以使用HAL库提供的函数来实现。

3. 在手机应用程序中，将数组转换为字符串，并通过蓝牙发送。在Android平台上，可以使用BluetoothAdapter和BluetoothSocket类来实现。

以下是一个简单的示例代码，演示如何将一个数组发送到STM32：

在STM32中：

#include "stm32f4xx.h"
#include "stm32f4xx_hal.h"

#define BUFFER_SIZE 10

uint8_t buffer[BUFFER_SIZE];

void USART2_IRQHandler(void) {
  HAL_UART_IRQHandler(&huart2);
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
  if (huart->Instance == USART2) {
    HAL_UART_Receive_IT(&huart2, buffer, BUFFER_SIZE);
  }
}

int main(void) {
  HAL_Init();
  SystemClock_Config();

  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_USART2_CLK_ENABLE();

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  GPIO_InitStruct.Pin = GPIO_PIN_2 | GPIO_PIN_3;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  NVIC_SetPriority(USART2_IRQn, 0);
  NVIC_EnableIRQ(USART2_IRQn);

  UART_HandleTypeDef huart2;
  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  HAL_UART_Init(&huart2);

  HAL_UART_Receive_IT(&huart2, buffer, BUFFER_SIZE);

  while (1) {
    // Do something with the received data
  }
}

在Android应用程序中：

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;

import java.io.IOException;
import java.io.OutputStream;
import java.util.UUID;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";
    private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); // Standard SPP UUID
    private static final String DEVICE_ADDRESS = "00:00:00:00:00:00"; // Replace with your Bluetooth device address

    private BluetoothAdapter mBluetoothAdapter;
    private BluetoothSocket mBluetoothSocket;
    private OutputStream mOutputStream;

    private final Handler mHandler = new Handler(Looper.getMainLooper()) {
        @Override
        public void handleMessage(Message msg) {
            // Handle messages from the STM32 here
        }
    };

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

        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(DEVICE_ADDRESS);

        try {
            mBluetoothSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
            mBluetoothSocket.connect();
            mOutputStream = mBluetoothSocket.getOutputStream();
        } catch (IOException e) {
            Log.e(TAG, "Error connecting to Bluetooth device", e);
        }

        // Send an array to the STM32
        byte[] array = {0x01, 0x02, 0x03, 0x04, 0x05};
        try {
            mOutputStream.write(array);
        } catch (IOException e) {
            Log.e(TAG, "Error sending data to STM32", e);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        try {
            mBluetoothSocket.close();
        } catch (IOException e) {
            Log.e(TAG, "Error closing Bluetooth socket", e);
        }
    }
}