com.polidea.rxandroidble2.exceptions.BleCharacteristicNotFoundException:找不到带有UUID的特征 [英] com.polidea.rxandroidble2.exceptions.BleCharacteristicNotFoundException: Characteristic not found with UUID

问题描述

我正在尝试从我的蓝牙设备读取未经请求的数据流.数据应显示为字节数组.不幸的是，我提供的UUID似乎不正确.可能出什么问题了?

I'm trying to read an unsolicited data stream from my Bluetooth device. The data should appear as a byte array. Unfortunately, the UUID I'm supplying doesn't seem to be the correct one. What could be going wrong?

val stringDeviceUUID = rxBleDevice.bluetoothDevice.uuids[0].toString()
val charUUID = UUID.fromString(stringDeviceUUID)

println("$stringDeviceUUID = $charUUID?")

/* If device if it is not already connected... */
if (rxBleDevice.connectionState != RxBleConnection.RxBleConnectionState.CONNECTED) {

 /* Establish connection to device */
 device !!.establishConnection(false) ?
  .doOnNext {
   _ -> Log.d("Device: ", "Connection Established")
  } ?
  .flatMapSingle {
   rxBleConnection -> rxBleConnection.readCharacteristic(charUUID)
  } ? .subscribe({
   count ->
   // count should be in bytes
   println("OUTPUT: $count")

  }, {
   throwable ->
   Log.d("Device: ", "$throwable")
  })


}

我收到以下错误:

D/Device:: com.polidea.rxandroidble2.exceptions.BleCharacteristicNotFoundException: Characteristic not found with UUID 00001101-0000-1000-8000-00805f9b34fb

此UUID有什么问题?正是我从设备中检索到的UUID，为什么它不让我进行交流?

What is wrong with this UUID? This is precisely the UUID I retrieve from the device so why won't it let me communicate?

推荐答案

从您的代码段中看不到它，但是rxBleDevice和device是相同的RxAndroidBle实例吗?如果不是，也许用rxBleDevice.establishConnection(false)

It can't be seen from your code snippet, but are rxBleDevice and device the same RxAndroidBle instance? If not, perhaps replace device !!.establishConnection(false) with rxBleDevice.establishConnection(false)

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