Could not find service with UUID on peripheral with UUID

I am trying to make a call on a read and it works the first time, but if I unexpectedly unmount the component that is in the middle of receiving the call, and try to make the read call again, I get this error:

Could not find service with UUID 967C8518-A801-4D25-B215-34C30176346A on peripheral with UUID 9ED2B473-1899-4C82-AF06-1837751F291E

When I am connecting the first time and it is a success, this is what it says:

Looking for 2751DB6D-C940-4F2A-8AFA-07B56C7C414E with properties 2
Found 2751DB6D-C940-4F2A-8AFA-07B56C7C414E

The catch happens in here from the first function:

BleManager.read(this.state.peripheralUUID,
      this.state.serviceUUID,
      this.state.networkListCharacteristicUUID).then((response) => {
        this.readResponse(this.state.networkListCharacteristicUUID)
      })
      .catch((error) => {
        console.log(error)
      })

And readResponse is another function doing another read. But this is not the function that is throwing the error however I wonder if it has anything to do with it…

readResponse (UUIDToRead) {
    this.setState({outputLog: 'Reading response'})
    BleManager.read(this.state.peripheralUUID,
      this.state.serviceUUID,
      UUIDToRead).then((response) => {
        if (this.state.currentCommand === this.state.commands[0]) {
          const strVal = hex2a(response)
          var networks = strVal.split(', ')
          // remove duplicates
          let uniqueNetworks = [...new Set(networks)]
          this.setState({wirelessNetworks: uniqueNetworks})
          this.setState({
            dataSource: this.state.dataSource.cloneWithRows(uniqueNetworks)
          })
          if (Platform.OS === 'android') {
            // may need this regardless, if we can't solve issue #11
            this.setState({
              outputLog: '',
              isAndroid: true,
              androidHelper: 'Don\'t see your network but know the name?' +
              '\nType it in the first empty box below.'
            })
          } else {
            this.setState({outputLog: 'Please select your network.'})
          }
        } else if (this.state.currentCommand === this.state.commands[1]) {
          const ipAddress = hex2a(response)
          this.setState({outputLog: this.state.outputLog + '\n ip addy: ' + ipAddress + ' ' + response})
          if (ipAddress.length === 0) {
            this.setState({currentCommand: this.state.commands[0]})
          } else {
            this.setState({currentCommand: this.state.commands[2]})
          }
          if (this.state.currentCommand === this.state.commands[0]) {
            Toast.showLongBottom('Couldn\'t connect to ' + this.state.wirelessSSID + '. Please try again')
          } else {
            Toast.showLongBottom('Connected to ' + ipAddress)
            this.setState({apiIPAddress: ipAddress})
            AsyncStorage.setItem('apiIPAddress', ipAddress).done()
            this.setState({
              dataSource: this.state.dataSource.cloneWithRows([])
            })
            AppConfig.trntblIPAddress = ipAddress
            BleManager.disconnect(this.state.peripheralUUID)
            NavigationActions.pop({refresh: {key: 'presentationScreen'}})
          }
        }
      })
      .catch((error) => {
        BleManager.disconnect(this.state.peripheralUUID)
        this.setState({outputLog: this.state.outputLog + '\nUnable to read: ' + error})
        this.setState({attemptingToConnect: false})
      })
  }

Just to clarify, this DOES work on the first call, but each additional call if I interrupt/unmount the component, it does not work and I get the aforementioned error. This is what I’m doing for the unmount:

componentWillUnmount () {
    this.toggleScanning(false)
    BleManager.stopScan()
    BleManager.disconnect(this.state.peripheralUUID)
    this.nae.remove() // this is BleManagerDiscoverPeripheral
  }

Am I missing anything? When I restart the app, it works again the first time, I’m just having issues with it when unmounting the component. Thanks for any help.

[tamirla]

The problem in my case was that I called BleManager.start in componentDidMount and it was called over and over again, whenever I navigated to this component. Not sure how it’s related to this error, and why it caused problems only in iOS, but once I moved it to Root component problem solved.

[tamirla]

@marcosinigaglia I read again the issue described above, and notice my issue is actually similar. In my app I have 2 pages, in first one I present discovered peripherals, then when user clicks on one of them I connect to it, read some characteristics, then navigate to second page to show some details I read. When I go back to first page and choose another peripheral, I first disconnect from connected device, then I connect to second device, but when trying to read characteristic that I know is there I get “Could not find service with UUID on peripheral”. If I do NOT navigate to second page, I can disconnect, connect & read without any problem.

So it looks like unmounting first page is related somehow.