CODEWITHSUNDEEP
androidbluetoothbluetooth-lowenergy
user3656651
user3656651

Reputation: 820

Android BLE Advertisement fails with error code 1

I have a sample app that is using BLE to advertise some data. However, my Advertisement fails with error code 1. Error code 1 basically means that the payload is bigger than the allowed 31 bytes for the advertisement packet. But from my code, I can see that the payload is less than 31 bytes. Where is the issue?

Some suggested turning off device name advertisement as a long name will take space. I have done that as well.

private void advertise(){
        BluetoothLeAdvertiser advertiser =         BluetoothAdapter.getDefaultAdapter().getBluetoothLeAdvertiser();
    AdvertiseSettings settings = new AdvertiseSettings.Builder()
            .setAdvertiseMode( AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY )
            .setTxPowerLevel( AdvertiseSettings.ADVERTISE_TX_POWER_HIGH )
            .setTimeout(0)
            .setConnectable( false )
            .build();
    ParcelUuid pUuid = new ParcelUuid( UUID.fromString( getString( R.string.ble_uuid ) ) );
    //ParcelUuid pUuid = new ParcelUuid( UUID.randomUUID() );


    AdvertiseData data = new AdvertiseData.Builder()
            .setIncludeDeviceName(false)
            .setIncludeTxPowerLevel(false)

            .addServiceUuid( pUuid )
            .addServiceData( pUuid, "D".getBytes() )
            .build();
    advertiser.startAdvertising( settings, data, advertisingCallback );
}

I expect this to advertise data "D", not fail with error code 1.

Upvotes: 5

Views: 3480

Answers (3)

Dhaval Kansara
Dhaval Kansara

Reputation: 3884

I tried both above solution of @Greg Moens and @S. Gysin, and what I found is You just have to change the ble_uuid value CDB7950D-73F1-4D4D-8E47-C090502DBD63 with 00001101-0000-1000-8000-00805F9B34FB.

It works for me.

Also you can check the complete blogpost for the same here: https://code.tutsplus.com/tutorials/how-to-advertise-android-as-a-bluetooth-le-peripheral--cms-25426

Upvotes: 1

S. Gysin
S. Gysin

Reputation: 11

The "serviceDataUuid" is 16-bit only. The method .addServiceData extracts silently a 16-bit UUID from a given 128-bit UUID, if the UUID is from the Bluetooth SIG. From your custom UUID = CDB7950D-73F1-4D4D-8E47-C090502DBD63, you must create a 16-bit UUID which is within the address range of the Bluetooth SIG.

private void advertise(){
    BluetoothLeAdvertiser advertiser = BluetoothAdapter.getDefaultAdapter().getBluetoothLeAdvertiser();
    AdvertiseSettings settings = new AdvertiseSettings.Builder()
            .setAdvertiseMode( AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY )
            .setTxPowerLevel( AdvertiseSettings.ADVERTISE_TX_POWER_HIGH )
            .setTimeout(0)
            .setConnectable( false )
            .build();
    //ParcelUuid pUuid = new ParcelUuid( UUID.fromString( getString( R.string.ble_uuid ) ) );
    //ParcelUuid pUuid = new ParcelUuid( UUID.randomUUID() );
    ParcelUuid pUuid = new ParcelUuid( UUID.fromString("cdb7950d-73f1-4d4d-8e47-c090502dbd63"));
    ParcelUuid pServiceDataUuid = new ParcelUuid(UUID.fromString("0000950d-0000-1000-8000-00805f9b34fb"));


    AdvertiseData data = new AdvertiseData.Builder()
            .setIncludeDeviceName(false)
            .setIncludeTxPowerLevel(false)

            .addServiceUuid( pUuid )
            .addServiceData( pServiceDataUuid, "D".getBytes() )
            .build();
    advertiser.startAdvertising( settings, data, advertisingCallback );
}

Screenshot nRF Connect

Upvotes: 1

Greg Moens
Greg Moens

Reputation: 1825

It looks to me like you are adding pUuid to the advertisement data twice. Once by itself and a second time with the data "D". BLE advertisements only have room for 1 UUID. Try eliminating that first call to:

.addServiceUuid(pUuid)

and instead only use:

.addServiceData(pUuid, "D".getBytes())

Upvotes: 8

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