# pc 接入 micro bit 方案

## 1. 通过串口连接

```js
document.getElementById("connect").addEventListener("click", async () => {
  try {
    if ("serial" in navigator) {
      // Get all serial ports the user has previously granted the website access to.
      const ports = await navigator.serial.getPorts();

      // 过滤出 micro:bit 设备，这里可能需要根据实际情况调整过滤器参数
      // const filters = [{ vendorId: 0x0D28, productId: 0x0204 }];
      // Filter on devices with the Arduino Uno USB Vendor/Product IDs.
      const filters = [
        { usbVendorId: 0x0d28, usbProductId: 0x0204 },
        { usbVendorId: 0x2341, usbProductId: 0x0001 },
      ];
      // Prompt user to select an Arduino Uno device.
      const port = await navigator.serial.requestPort({ filters });

      const { usbProductId, usbVendorId } = port.getInfo();

      // Wait for the serial port to open.
      await port.open({ baudRate: 9600 });

      // const writer = port.writable.getWriter();

      // const data = new Uint8Array([104, 101, 108, 108, 111]); // hello
      // await writer.write(data);

      // // Allow the serial port to be closed later.
      // writer.releaseLock();

      // await port.close();
      // 如果串口显示中文乱码，多半是编码格式错误的问题，这里编码格式选择’gb2312‘
      const textDecoder = new TextDecoderStream("gb2312");
      // 接收数据前先连接管道，这样就能边接收边转换了
      const readableStreamClosed = port.readable.pipeTo(textDecoder.writable);
      // 转换后的数据读取器
      const reader = textDecoder.readable.getReader();

      while (true) {
        const { value, done } = await reader.read();
        if (done) {
          reader.releaseLock();
          break;
        }
        console.log(value);
      }

      function stringToUint8Array(str) {
        var arr = [];
        for (var i = 0, j = str.length; i < j; ++i) {
          arr.push(str.charCodeAt(i));
        }

        var tmpUint8Array = new Uint8Array(arr);
        return tmpUint8Array;
      }
      console.log("port closed");
    }
  } catch (error) {
    console.error("There was an error:", error);
  }
});
```

## 2. link（硬件助手）+ 串口连接

nodejs 串口连接

````js

const SerialPort = require('serialport');
const Readline = require('@serialport/parser-readline');

// 找到你的Micro:bit串口名称，这可能会根据你的系统和Micro:bit而变，需要替换。
// 在Windows上可能是'COM3'、'COM4'等，而在macOS和Linux上一般是'/dev/tty.usbmodem1422'或类似名称。
const port = new SerialPort('/dev/tty.usbmodem1422', {
  baudRate: 115200,
});

// 串口数据读取的Parser
const parser = port.pipe(new Readline({ delimiter: '\r\n' }));

parser.on('data', data => {
  console.log('Received data:', data);
});

// 发送字符串数据到Micro:bit
function writeToPort(data) {
  port.write(data, function(err) {
    if (err) {
      return console.error('Failed to write to port:', err.message);
    }
    console.log('Message written to micro:bit:', data);
  });
}

// 程序关闭时关闭串口
process.on('exit', (code) => {
  port.close(() => {
    console.log('Serial port closed');
  });
});

// 使用writeToPort函数发送数据到Micro:bit
writeToPort('Hello, micro:bit!');

``

## 3.蓝牙连接

```js
    document.getElementById("connect").addEventListener("click", async () => {
      try {
        if ("serial" in navigator) {
          // Get all serial ports the user has previously granted the website access to.
          const ports = await navigator.serial.getPorts();

          // 过滤出 micro:bit 设备，这里可能需要根据实际情况调整过滤器参数
          // const filters = [{ vendorId: 0x0D28, productId: 0x0204 }];
          // Filter on devices with the Arduino Uno USB Vendor/Product IDs.
          const filters = [
            { usbVendorId: 0x0d28, usbProductId: 0x0204 },
            { usbVendorId: 0x2341, usbProductId: 0x0001 },
          ];
          // Prompt user to select an Arduino Uno device.
          const port = await navigator.serial.requestPort({ filters });

          const { usbProductId, usbVendorId } = port.getInfo();

          // Wait for the serial port to open.
          await port.open({ baudRate: 9600 });


          // const writer = port.writable.getWriter();

          // const data = new Uint8Array([104, 101, 108, 108, 111]); // hello
          // await writer.write(data);

          // // Allow the serial port to be closed later.
          // writer.releaseLock();

          // await port.close();
          // 如果串口显示中文乱码，多半是编码格式错误的问题，这里编码格式选择’gb2312‘
          const textDecoder = new TextDecoderStream('gb2312');
          // 接收数据前先连接管道，这样就能边接收边转换了
          const readableStreamClosed = port.readable.pipeTo(textDecoder.writable);
          // 转换后的数据读取器
          const reader = textDecoder.readable.getReader();

          while (true) {
            const { value, done } = await reader.read();
            if (done) {
              reader.releaseLock();
              break;
            }
            console.log(value);
          }

          function stringToUint8Array(str){
              var arr = [];
              for (var i = 0, j = str.length; i < j; ++i) {
                arr.push(str.charCodeAt(i));
              }

              var tmpUint8Array = new Uint8Array(arr);
              return tmpUint8Array
            }
          console.log("port closed");
        }
      } catch (error) {
        console.error("There was an error:", error);
      }
    });
````


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://shenjunhong.gitbook.io/blog/chang-jian-zong-jie/bian-cheng-mao/micor-bit.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.