I am trying to advertise in NEXUS 9 and getting the error of ADVERTISE_FAILED_DATA_TOO_LARGE. It was working perfectly fine when I was adding the service after successfully advertising but if I add the service through Advertise Data builder so that other devices can filter while scanning, I get error code 1 i.e ADVERTISE_FAILED_DATA_TOO_LARGE
a) Working Code
public void startAdvertisingService() {
AdvertiseSettings settings = new AdvertiseSettings.Builder()
.setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH)
.setTimeout(0)
.setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY)
.build();
AdvertiseData.Builder advertiseData = new AdvertiseData.Builder();
advertiseData.setIncludeDeviceName(true);
BluetoothLeAdvertiser myBluetoothLeAdvertiser = btAdapter.getBluetoothLeAdvertiser();
myBluetoothLeAdvertiser.stopAdvertising(mAdvertiseCallback);
myBluetoothLeAdvertiser.startAdvertising(settings, advertiseData.build(),mAdvertiseCallback);
}
private AdvertiseCallback mAdvertiseCallback = new AdvertiseCallback() {
@Override
public void onStartSuccess(AdvertiseSettings settingsInEffect) {
super.onStartSuccess(settingsInEffect);
BLEBroadcast();
}
@Override
public void onStartFailure(int errorCode) {
String description = "";
if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_FEATURE_UNSUPPORTED)
description = "ADVERTISE_FAILED_FEATURE_UNSUPPORTED";
else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_TOO_MANY_ADVERTISERS)
description = "ADVERTISE_FAILED_TOO_MANY_ADVERTISERS";
else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_ALREADY_STARTED)
description = "ADVERTISE_FAILED_ALREADY_STARTED";
else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_DATA_TOO_LARGE)
description = "ADVERTISE_FAILED_DATA_TOO_LARGE";
else if (errorCode == AdvertiseCallback.ADVERTISE_FAILED_INTERNAL_ERROR)
description = "ADVERTISE_FAILED_INTERNAL_ERROR";
else description = "unknown";
}
};
and also adding the service:
void BLEBroadcast() {
BluetoothGattCharacteristic characteristic = new BluetoothGattCharacteristic(characteristicUUID, BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_INDICATE | BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_WRITE, BluetoothGattCharacteristic.PERMISSION_READ | BluetoothGattCharacteristic.PERMISSION_WRITE);
BluetoothGattDescriptor desc = new BluetoothGattDescriptor(descriptorUUID, BluetoothGattDescriptor.PERMISSION_READ | BluetoothGattDescriptor.PERMISSION_WRITE);
desc.setValue("".getBytes());
characteristic.addDescriptor(desc);
BluetoothGattService service = new BluetoothGattService(serviceUUID, BluetoothGattService.SERVICE_TYPE_PRIMARY);
service.addCharacteristic(characteristic);
mGattServer.addService(service);
}
b) Not working when adding service initially so that can be discovered by central through filter:
calling BLEBroadcast()
function before calling startAdvertisingService()
and also adding
AdvertiseData.Builder advertiseData = new AdvertiseData.Builder();
advertiseData.addServiceUuid(new ParcelUuid(serviceUUID));
gives advertising failure with error code 1.
I suspect that this is the line of code causing the trouble:
advertiseData.setIncludeDeviceName(true);
The advertisement will not have enough space for both the device name and a 16 byte service UUID. So if you include the above then add:
advertiseData.addServiceUuid(new ParcelUuid(serviceUUID));
You will get the error you describe. Try removing the first line.
Basically your data exceeds 31 bytes, so you need to trim it down.
Change this to false, then it will work:
advertiseData.setIncludeDeviceName(false);
You can either change your device's name to something shorter. Example: XYZ_Name_pic - > XYZ
Go to bluetooth -> settings - > rename device name
or you can pass false instead of true
advertiseData.setIncludeDeviceName(false); // pass false not true
来源:https://stackoverflow.com/questions/31490649/bluetooth-peripheral-advertise-failed-data-too-large