Call to getCentralManager returned nil[NordicDFU.startDFU][IOS]

[daihieptn97]

I implement startDFU function and faulty Call to getCentralManager returned nil

 RNFetchBlob
        .config({
          // response data will be saved to this path if it has access right.
          path: dirs.DocumentDir + '/FirmwareBLE.zip',
          fileCache: true,
        })
        .fetch('GET', 'http://localhost/uploads/SdoorMasterV1001_009.zip', {
          //some headers ..
        })
        .then((res) => {
          // the path should be dirs.DocumentDir + 'path-to-file.anything'
          console.log('The file saved to ', res.path());

          NordicDFU.startDFU({
            //deviceAddress: remote.macBleHex,
            deviceAddress: "6E400001-B5A3-F393-E0A9-E50E24DCCA9E",
            deviceName : "423423423",
            filePath: res.path(),
          })
            .then(res => console.log('Transfer done:', res))
            .catch(console.log);

        });
    }, 2000);

I have added the code to the xcode in the function didFinishLaunchingWithOptions(AppDelegate.m)

  [RNNordicDfu setCentralManagerGetter:^() {
    return [BleManager getCentralManager];
  }];

  // Reset manager delegate since the Nordic DFU lib "steals" control over it
  [RNNordicDfu setOnDFUComplete:^() {
    NSLog(@"onDFUComplete");
    CBCentralManager * manager = [BleManager getCentralManager];
    manager.delegate = [BleManager getInstance];
  }];
  [RNNordicDfu setOnDFUError:^() {
    NSLog(@"onDFUError");
    CBCentralManager * manager = [BleManager getCentralManager];
    manager.delegate = [BleManager getInstance];
  }];

Package.json with me

"dependencies": {
    "@react-native-community/geolocation": "^2.0.2",
    "@react-native-community/netinfo": "^4.3.0",
    "base-64": "^0.1.0",
    "crypto-js": "^3.1.9-1",
    "native-base": "^2.13.8",
    "react": "16.9.0",
    "react-native": "0.61.3",
    "react-native-action-button": "^2.8.5",
    "react-native-background-timer": "^2.0.1",
    "react-native-base64": "0.0.2",
    "react-native-ble-manager": "^6.7.0",
    "react-native-ble-plx": "^1.1.0",
    "react-native-device-info": "^5.1.0",
    "react-native-elements": "^0.19.1",
    "react-native-facebook-account-kit": "1.0.0",
    "react-native-firebase": "^5.5.6",
    "react-native-gesture-handler": "^1.0.12",
    "react-native-image-picker": "^0.27.1",
    "react-native-ionicons": "^4.6.1",
    "react-native-keep-awake": "^3.1.0",
    "react-native-modal": "^11.4.0",
    "react-native-network-info": "^5.2.1",
    "react-native-nordic-dfu": "^3.0.1",
    "react-native-paho-mqtt": "^0.1.1",
    "react-native-parallax-header": "^1.1.3",
    "react-native-parallax-scroll-view": "^0.21.3",
    "react-native-progress": "^3.6.0",
    "react-native-smartconfig-2": "^1.2.3",
    "react-native-smartconfig-ll": "^0.2.4",
    "react-native-sortable-grid": "^2.0.0",
    "react-native-sortable-listview": "^0.2.9",
    "react-native-swiper": "^1.5.14",
    "react-native-udp": "^2.3.1",
    "react-native-vector-icons": "^6.6.0",
    "react-native-wheel-datepicker": "^2.2.3",
    "react-navigation": "^3.0.9",
    "react-navigation-collapsible": "^3.0.3",
    "react-redux": "^5.0.7",
    "recyclerlistview": "^1.3.4",
    "redux": "^4.0.0",
    "redux-thunk": "^2.3.0",
    "rn-fetch-blob": "github:joltup/rn-fetch-blob"
  },

thanks you !

[SaltedBlowfish]

This is because you are not calling .start() on BleManager. See first bullet point here: https://github.com/innoveit/react-native-ble-manager#note

Example:

...
BleManager.start({showAlert: false})
  .then(() => {
    // Success code
    console.log('Module initialized');
  });
...