如何知道 monitorCharacteristic 何时完成 react native ble plx？

Question

我在我的项目中使用 react-native-ble-plx 来与我的工具进行通信，我正在尝试监控它的特性之一。

结果相当长，因此 monitoringCharacteristic 函数一直在循环，直到它向我发送所有内容，但我不知道如何确保循环完成。

这是我的监控功能：

const scanMyDevice = async (device) => {

    const serviceUUID = '569a1-****'
    const writeUUID = '569a2-****'
    const readUUID = '569a2-****'

    await device.discoverAllServicesAndCharacteristics()
    await device.characteristicsForService(serviceUUID)

    await device.writeCharacteristicWithResponseForService(serviceUUID, writeUUID, 'IzEwCg==')

    var tempTrame = ''

    const subscription = device.monitorCharacteristicForService(serviceUUID, readUUID, (error, a) => {

      if (error) {
        console.log(error)
        console.log(error.message)
      }
      else {
        tempTrame = tempTrame + base64.decode(a.value)
        setTrameResult(tempTrame)
        console.log('// INSIDE ///', tempTrame)
      }
    }, 'idMonitor')

    return () => {
      subscription.remove();
    }

    console.log('DONE')
  }

在我的代码中，'DONE' 将在 'INSIDE trame' 之前打印。

我试图将 console.log('DONE') 放在 return 中，但它从未被打印出来。我试图将 .then( console.log('DONE')) 放在 return 之前，但它向我发送了一条错误消息，说它与此处无关...

有人可以帮我吗？

Answer 1

最后，我通过 BLE 为我想要 send/read 的信息定义了一个结束模式，从而解决了这个问题，然后我编写了一个循环以在未遇到结束模式时继续阅读：

let tempTrame = tempTrame + base64.decode(a.value)
let finalTrame = ''

// check if my variable has the end symbols (to be sure that I have all the information) and if it is the first time I get this information
if (tempTrame.includes('#109F')) {

    stop = true

    // suppress end symbols
    tempTrame = tempTrame.replace(endTrame, '')
    finalTrame = tempTrame
}
console.log(finalTrame)

如何知道 monitorCharacteristic 何时完成 react native ble plx？

How to know when monitorCharacteristic is done with react native ble plx?

bluetooth-lowenergy

react-native

react-native-ble-plx