Default framer for async `async_io.ModbusSocketServer` is ambiguous

[maltekliemann]

Versions

• Python: 3.8.0
• OS: macOS 11.6
• Pymodbus: 2.5.2
• Modbus Hardware (if used): None

Description

server.async_io.ModbusSerialServer uses ModbusRtuFramer as default framer, but the factory server.async_io.StartSerialServer uses ModbusAsciiFramer. Neither default value is mentioned in the documentation, which makes this slightly confusing, especially since all other factories use the same default values as the __init__ methods. I think the interface should be same. Maybe you should just stop double-booking the default values between __init__ and factory?