如何通过网络蓝牙API将十六进制发送到设备?

问题描述 投票:0回答:1

我已通过网络蓝牙API连接到设备。现在,我有一个十六进制字符串发送到设备:01113704B00000313233343132160506155001DB。此十六进制字符串无法正确发送到设备。如何将此十六进制发送到设备?

我尝试使用十六进制数组缓冲区(NPM插件),并亲自编写了该方法。他们不起作用。

这是我的代码:

import React from 'react';
import './App.css';
const hexToArrayBuffer = require('hex-to-array-buffer')


function App() {
  const openBLE = () => {
    navigator.bluetooth.requestDevice({
      filters: [{
        services: ['6e400001-b5a3-f393-e0a9-e50e24dcca9e']
      }]
    })
    .then(device => { 
      console.log('Begin to connect')
      return device.gatt.connect()
    })
    .then(server => {
      // Getting Battery Service...
      console.log('Connect to GATT server')
      return server.getPrimaryService('6e400001-b5a3-f393-e0a9-e50e24dcca9e');
    })
    .then(service => {
      console.log('Get characteristic')
      return service.getCharacteristic('6e400003-b5a3-f393-e0a9-e50e24dcca9e');
    })
    .then(characteristic => {
      console.log('Write characteristic')
      const buffer = hexToArrayBuffer('01113704B00000313233343132160506155001DB')
      return characteristic.writeValue(buffer); 
    })
    .catch(error => { console.log(error); });
  }
  return (
    <div className="App">
      <button onClick={ openBLE } >hello</button>
    </div>
  );
}

export default App;
javascript web-bluetooth
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