stm32蓝牙hc05发送数据给app
时间: 2023-05-28 13:01:09 浏览: 278
在STM32上使用HC-05蓝牙模块与App进行数据通信可以按照如下步骤进行:
1. 首先需要配置HC-05蓝牙模块和STM32之间的串口通信,包括波特率、数据位、停止位、校验位等参数。可以参考HC-05蓝牙模块的数据手册和STM32的相关文档进行配置。
2. 在STM32中编程实现数据的发送操作。可以使用STM32的USART串口库函数来实现数据的发送,示例代码如下:
#include "stm32f1xx_hal.h"
UART_HandleTypeDef huart1;
void SystemClock_Config(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_USART1_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
HAL_UART_Init(&huart1);
uint8_t data[10] = "Hello";
while(1)
{
HAL_UART_Transmit(&huart1, data, sizeof(data), 100);
HAL_Delay(1000);
}
}
3. 接下来,可以在App中开发接收STM32发送数据的代码。可以使用Android SDK提供的Bluetooth API进行开发,示例代码如下:
private static BluetoothAdapter bluetoothAdapter;
public static void connect(Context context) {
// Get a handle to the default local Bluetooth adapter
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
// Get a BluetoothDevice representing the remote device
BluetoothDevice device = bluetoothAdapter.getRemoteDevice("00:00:00:00:00");
// Create a socket with the remote device using UUID
BluetoothSocket socket;
try {
socket = device.createRfcommSocketToServiceRecord(UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));
} catch (IOException e) {
Log.e(TAG, "Failed to create Bluetooth socket");
return;
}
// Connect to the remote device using the Bluetooth socket
try {
socket.connect();
} catch (IOException e) {
Log.e(TAG, "Failed to connect to remote device");
try {
socket.close();
} catch (IOException e2) {
Log.e(TAG, "Failed to close Bluetooth socket");
}
return;
}
// Start a thread to read data from the Bluetooth socket
new Thread(new Runnable() {
@Override
public void run() {
byte[] buffer = new byte[1024];
int bytes;
while (true) {
try {
InputStream inputStream = socket.getInputStream();
bytes = inputStream.read(buffer);
String data = new String(buffer, 0, bytes);
Log.d(TAG, data);
} catch (IOException e) {
Log.e(TAG, "Failed to read from Bluetooth socket");
break;
}
}
}
}).start();
}
通过以上步骤,即可实现STM32与App之间的数据通信。需要注意的是,在进行数据交互时需要保证HC-05蓝牙模块和App之间的连接状态稳定,并避免数据丢失。