on
Called when the MTU (Maximum Transmission Unit) for a connection has changed.
This callback is invoked after BluetoothGatt.requestMtu completes. A larger MTU allows for more data to be sent in a single BLE packet, improving throughput for large data transfers.
Parameters
gatt
The BluetoothGatt instance for the connection.
mtu
The new MTU size in bytes. The effective payload size is MTU - 3 bytes due to ATT protocol overhead.
status
BluetoothGatt.GATT_SUCCESS if the MTU was changed successfully, or an error code if the request failed.