Fixed dispose on servers

AMWD.Protocols.Modbus.Serial/README.md

@@ -22,6 +22,19 @@ float voltage = registers.GetSingle();
 Console.WriteLine($"The voltage of device #{unitId} between L1 and N is: {voltage:N2}V");
 ```
 
+If you want to use the `ASCII` protocol instead, you can do this on initialization:
+
+```csharp
+// [...]
+
+using var client = new ModbusSerialClient(serialPort)
+{
+	Protocol = new AsciiProtocol();
+};
+
+// [...]
+```
+
 
 ## Sources