Buttonless DFU not working on iOS

[jthansen]

I am unable to get DFU to work with iOS. I believe it has to deal with the device id being different in iOS with Flutter Blue. Since iOS creates their own UUID instead of using the MAC address like Android.

[fengqiangboy]

Did NRFConnect worked?

[jthansen]

Yeah, that works on iOS. Is there something I need to add with iOS as opposed to Android?

This code works with Android and then with iOS I get a PlatformException thrown.

• PlatformException(DFU_FAILED, iOS UUID, null)

Future<bool> performDfu() async {
    dfuRunning = true;
    try {
      var s = await FlutterNordicDfu.startDfu(device.id.id,'assets/file.zip',
        fileInAsset: true,
        enableUnsafeExperimentalButtonlessServiceInSecureDfu: true,
        progressListener:
        DefaultDfuProgressListenerAdapter(onProgressChangedHandle: (
            deviceAddress,
            percent,
            speed,
            avgSpeed,
            currentPart,
            partsTotal,
            ) {
          print('deviceAddress: $deviceAddress, percent: $percent');
        }),
      );
      print(s);
      dfuRunning = false;
      return true; 
    } catch (e) {
      dfuRunning = false;
      print(e);
      return false;
    }
  }

[fengqiangboy]

Can you paste more log that console print?

[jthansen]

[VERBOSE-2:ui_dart_state.cc(148)] Unhandled Exception: PlatformException(DFU_FAILED, Device address: 502CCB90-5B67-4287-3C7F-A17AD3124958, null)
#0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:564:7)
#1      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:302:33)
<asynchronous suspension>
#2      FlutterNordicDfu.startDfu (package:flutter_nordic_dfu/flutter_nordic_dfu.dart:141:27)
<asynchronous suspension>
#3      _x.performDfu (package:xxx/widgets/x.dart:1137:38)
<asynchronous suspension>
#4      System._updateFirmwareTapped.<anonymous closure> (package:xxx/screens/more/settings/system.dart:57:18)
#5      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:511:14)
#6      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:566:30)
#7      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:166:24)
#8      TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:240:9)
#9      TapGestureRecognizer.acceptGesture (package:flutter/src/gestures/tap.dart:211:7)
#10     GestureArenaManager.sweep (package:flutter/src/gestures/arena.dart:156:27)
#11     _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:225:20)
#12     _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:199:22)
#13     _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
#14     _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
#15     _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
#16     _rootRunUnary (dart:async/zone.dart:1136:13)
#17     _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#18     _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7)
#19     _invoke1 (dart:ui/hooks.dart:233:10)
#20     _dispatchPointerDataPacket (dart:ui/hooks.dart:154:5)

[fengqiangboy]

Sorry, I can't find the problem by this log message, can you try to use IOS-Pods-DFU-Library?
And tell me the right code, I will compare them with my DFU platform code. Thx~

[jthansen]

I got the iOS DFU library to work with this code, nRF Toolbox Repo. I had to change: @objc public var alternativeAdvertisingNameEnabled from true to false. I tried changing that property in your plugin but it still didn't work. Are you calling the DFU initiator differently? They have this for their DFU function:

func performDFU() {
        self.disableOtherButtons()
        progress.isHidden = false
        progressLabel.text = nil
        progressLabel.isHidden = false
        uploadStatus.isHidden = false
        uploadButton.isEnabled = false

        self.registerObservers()
        
        // To start the DFU operation the DFUServiceInitiator must be used
        let initiator = DFUServiceInitiator(centralManager: centralManager!, target: selectedPeripheral!)
        initiator.forceDfu = UserDefaults.standard.bool(forKey: "dfu_force_dfu")
        initiator.packetReceiptNotificationParameter = UInt16(UserDefaults.standard.integer(forKey: "dfu_number_of_packets"))
        initiator.logger = self
        initiator.delegate = self
        initiator.progressDelegate = self
        initiator.enableUnsafeExperimentalButtonlessServiceInSecureDfu = true
        dfuController = initiator.with(firmware: selectedFirmware!).start()
        uploadButton.setTitle("Cancel", for: UIControlState())
        uploadButton.isEnabled = true
    }

Have you accomplished buttonless DFU with this plugin yet?

[fengqiangboy]

Yes, we use dfuInitiator.start(targetWithIdentifier: uuid) to start dfu

[jthansen]

It's working today with a different unit. So I'm not sure what was all wrong.