[FIXED] Android BLE Gatt connection change statuses

Issue

I have an android app to connect to a BLE device and write to it. I can successfully connect, read and write to it. As a part of testing, we are trying different disconnection scenarios.

Sometimes, if BLE device disconnects the connection, I get the connection change as disconnect with status value as 19. Also if there is any bond error, status equals 22. If I programmatically disconnect the connection, this status gives me 0. But none of these states except 0 are specified in android documentation.

Posting a sample BluetoothGattCallback

private BluetoothGattCallback bluetoothGattCallback = new BluetoothGattCallback() {
    @Override
    public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
        Log.i(TAG, "onConnectionStateChange status: "+status+", newState: "+newState);
        /*i need to know the possible values for this status variable*/
        if(newState == BluetoothProfile.STATE_CONNECTED) {
            gatt.discoverServices();
        } else {
            gatt.close();
        }
    }

    @Override
    public void onServicesDiscovered(BluetoothGatt gatt, int status) {
        Log.i(TAG, "onServicesDiscovered service discovered");
    }
};

Does anyone face this same problem and sorted out the list of statuses. I need to know the possible values for status variable in onConnectionStateChange method

Solution

Here is the list of codes i have

• Programmatically disconnected - 0
• Device went out of range - 8
• Disconnected by device - 19
• Issue with bond - 22
• Device not found - 133(some phone it gives 62)

I have tested disconnect scenario's in 5.0.2, 5.1, 6.0 and 6.0.1. But only found this bond issue code in 6.0.1 android version.

Answered By - Ijas Ahamed N
Answer Checked By - Clifford M. (JavaFixing Volunteer)