测试

这是测试文章内容

navigator.bluetooth.getAvailability().then((available) => {
  if (available) {
    console.log("This device supports Bluetooth!");
  } else {
    console.log("Doh! Bluetooth is not supported");
  }
});

 navigator.bluetooth.requestDevice({
     optionalServices:['蓝牙设备服务ID'],
     acceptAllDevices:true
 }).then(async (device) => {
     that.unCharDevice = device;
     let server = await device.gatt.connect();
     let service = await server.getPrimaryService('蓝牙设备服务ID')
     let characteristic = await service.getCharacteristic('设备主动上报状态ID')
     let unCharacteristic = await service.getCharacteristic('向设备写入命令ID')
     characteristic.readValue();//读取命令
     characteristic.startNotifications();//监听命令下发后的返回值
     //监听蓝牙设备命令下发后的返回值
     characteristic.addEventListener('characteristicvaluechanged',item => {
         console.log(item)
     })
 })
     .catch(error => {
     alert('报错'+error)
 })    


 navigator.bluetooth.requestDevice({
     optionalServices:['蓝牙设备服务ID'],
     acceptAllDevices:true
 }).then(async (device) => {
    device.fore
 })
     .catch(error => {
     alert('报错'+error)
 })    
// 下发命令
unCharacteristic.writeValue(
    new Uint8Array('下发的命令byte数组')
)

// 断开连接
that.unCharDevice.addEventListener('gattserverdisconnected', event => {
  const device = event.target;
  console.log(`Device ${device.name} is disconnected.`);
});
  return device.gatt.connect();

血氧