CoreBluetooth peripheral.maximumWriteValueLength?

Hello,

1. Before connecting to BLE peripheral, I check peripheral's maximumWriteValueLength by followings and get values for

512 : withResponse

-3 : withoutResponse

            print("maximumWriteValueLength")
            print(self.peripheral.maximumWriteValueLength(for: CBCharacteristicWriteType.withResponse)) // 512
            print(self.peripheral.maximumWriteValueLength(for: CBCharacteristicWriteType.withoutResponse)) // -3

           // Need to override peripheral.maximumWriteValueLength value here...

self.centralManager.connect(sender.light!.peripheral!, options: [CBConnectPeripheralOptionNotifyOnDisconnectionKey : true])

Is there's way to replace(override) this value before connect to peripheral?

2. Is it possible to disable DLE(Data Length Extension) feature by modifying CoreBluetooth?