tkubasik-luna

        val callback = object : ScanCallback() {
            override fun onScanResult(callbackType: Int, result: ScanResult?) {
                super.onScanResult(callbackType, result)
                result?.device?.connectGatt(context, false, gattCallBack)
            }
        }

        adapter = BluetoothAdapter.getDefaultAdapter()
        val builder = ScanFilter.Builder()
        builder.setServiceUuid(ParcelUuid(SERVICE_UUID))

tkubasik-luna

val gattCallBack = object : BluetoothGattCallback() {
            override fun onConnectionStateChange(gatt: BluetoothGatt, status: Int, newState: Int) {
                super.onConnectionStateChange(gatt, status, newState)
                val isSuccess = status == BluetoothGatt.GATT_SUCCESS
                val isConnected = newState == BluetoothProfile.STATE_CONNECTED
                if (isSuccess && isConnected) {
                    // Discover the service on the server on are connected on
                    gatt.discoverServices()
                }
            }