[Bug]: Service UUIDs no longer found in advertismentData

[LipJ01]

Requirements

• [X] I've looked at the README 'Common Problems' section

Have you checked this problem on the example app?

No

FlutterBluePlus Version

1.27.1-1.28.7

Flutter Version

3.14.0

What OS?

iOS

OS Version

17.1.1

Bluetooth Module

Nordic nRF52833

What is your problem?

The following code snippet no longer works the same. Prior to 1.27.1 This will find the serviceUUID that my ble device is advertising. Post 1.27.0 I always have empty serviceUUID field in advertismentData.

FlutterBluePlus.scanResults.listen((results) {
    for (ScanResult r in results) {
        print('BLE: ${r.device.platformName} GATT table: ${r.advertisementData}');
    }
}

Logs

Previously:
BLE: MicroNode_123456_v6.5.13 GATT table: AdvertisementData{localName: MicroNode_123456_v6.5.13, txPowerLevel: null, connectable: true, manufacturerData: {}, serviceData: {}, serviceUuids: [8D53DC1D-1DB7-4CD3-868B-8A527460AA84]}

Now:
BLE: MicroNode_123456_v6.5.13 GATT table: AdvertisementData{localName: MicroNode_123456_v6.5.13, txPowerLevel: null, connectable: true, manufacturerData: {}, serviceData: {}, serviceUuids: []}

[chipweinberger]

try master branch

[chipweinberger]

fixed in 1.28.8

[LipJ01]

I've just tested. This is NOT fixed. Please reopen issue and perhaps slow down the releases a tad.

[sprimm98]

Hi! This problem also exists in version 1.29.11 (Flutter 3.16.2 on Android 11). Please reopen this thread.

[chipweinberger]

@sprimm98 open a new issue.

also perhaps you can debug the issue, and open a PR. maybe the problem is here.

        // Service UUIDs
        List<String> serviceUuidsB = new ArrayList<String>();
        if(serviceUuids != null) {
            for (ParcelUuid s : serviceUuids) {
                serviceUuidsB.add(uuidStr(s.getUuid()));
            }
        }

[sprimm98]

Thanks for replying @chipweinberger. For now, I'll set continuousUpdates back to true for scanning as this seems to solve the problem. I don't think there is an issue with that snippet above, maybe it's related to the Bluetooth module.

[chipweinberger]

please can you try to debug it? ie why do you need to set continuousUpdates to get a response?

this seems to be a common problem

[chipweinberger]

its related to this bug: https://github.com/boskokg/flutter_blue_plus/issues/710#issuecomment-1837140039

can you add these logs

                log(logLevel.DEBUG, remoteId + " advHex:" + advHex); 

                // filter duplicates
                if (((boolean) mScanFilters.get("continuous_updates")) == false) {
                    boolean isDuplicate = mAdvSeen.containsKey(remoteId) && mAdvSeen.get(remoteId).equals(advHex);
                    mAdvSeen.put(remoteId, advHex); // remember
                    if (isDuplicate) {
                        log(logLevel.DEBUG, "filtered duplicate. " + remoteId);
                        return;
                    }
                }

                    // filter keywords
                    String name = scanRecord != null ? scanRecord.getDeviceName() : "";
                    List<String> keywords = (List<String>) mScanFilters.get("with_keywords");
                    if (filterKeywords(keywords, name) == false) {
                        log(logLevel.DEBUG, "filtered keyword " + remoteId);
                        return;
                    }

                    // filter divisor
                    if (((boolean) mScanFilters.get("continuous_updates")) != false) {
                        int count = scanCountIncrement(remoteId);   
                        int divisor = (int) mScanFilters.get("continuous_divisor");
                        if ((count % divisor) != 0) {
                            log(logLevel.DEBUG, "filtered divisor " + remoteId);
                            return;
                        }
                    }

[sprimm98]

These logs worked as expected, showing remoteId and advHex. So I went back to startScan and assumed this was caused by CALLBACK_TYPE_FIRST_MATCH. However, you have already addressed this in the latest release. Thanks.