diff --git a/csharp/Lib/Protocols/Modbus/Clients/Endianness.cs b/csharp/Lib/Protocols/Modbus/Clients/Endianness.cs
new file mode 100644
index 000000000..d53103dec
--- /dev/null
+++ b/csharp/Lib/Protocols/Modbus/Clients/Endianness.cs
@@ -0,0 +1,10 @@
+namespace InnovEnergy.Lib.Protocols.Modbus.Clients;
+
+[Flags]
+public enum Endianness
+{
+    LittleEndian32BitIntegers = 0,
+    LittleEndian32Floats = 0,
+    BigEndian32BitIntegers = 1,
+    BigEndian32Floats = 2,
+}
\ No newline at end of file
diff --git a/csharp/Lib/Protocols/Modbus/Clients/ModbusClient.cs b/csharp/Lib/Protocols/Modbus/Clients/ModbusClient.cs
index 66576d9d1..1bc736622 100644
--- a/csharp/Lib/Protocols/Modbus/Clients/ModbusClient.cs
+++ b/csharp/Lib/Protocols/Modbus/Clients/ModbusClient.cs
@@ -1,6 +1,6 @@
-using System.Threading.Channels;
 using InnovEnergy.Lib.Protocols.Modbus.Connections;
 using InnovEnergy.Lib.Protocols.Modbus.Conversions;
+using static InnovEnergy.Lib.Protocols.Modbus.Clients.Endianness;
 
 namespace InnovEnergy.Lib.Protocols.Modbus.Clients;
 
@@ -13,8 +13,9 @@ public abstract class ModbusClient
 {
     protected ModbusConnection Connection { get; }
     protected Byte             SlaveId    { get; }
-    
-    
+    protected Endianness       Endianness { get; }
+
+
     // TODO: add additional functions: coils...
     
     public abstract Coils           ReadDiscreteInputs  (UInt16 readAddress,  UInt16 nValues);
@@ -40,11 +41,11 @@ public abstract class ModbusClient
         return WriteRegisters(writeAddress, (IReadOnlyList<UInt16>)values);
     }
     
-    
-    protected ModbusClient(ModbusConnection connection, Byte slaveId)
+    protected ModbusClient(ModbusConnection connection, Byte slaveId, Endianness endianness = LittleEndian32BitIntegers | LittleEndian32Floats)
     {
         Connection = connection;
         SlaveId    = slaveId;
+        Endianness = endianness;
     }
 
     public void CloseConnection() => Connection.Close();
diff --git a/csharp/Lib/Protocols/Modbus/Clients/ModbusTcpClient.cs b/csharp/Lib/Protocols/Modbus/Clients/ModbusTcpClient.cs
index 89824106c..c0506cbf3 100644
--- a/csharp/Lib/Protocols/Modbus/Clients/ModbusTcpClient.cs
+++ b/csharp/Lib/Protocols/Modbus/Clients/ModbusTcpClient.cs
@@ -4,13 +4,13 @@ using InnovEnergy.Lib.Protocols.Modbus.Conversions;
 using InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Commands;
 using InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Replies;
 using InnovEnergy.Lib.Protocols.Modbus.Tcp;
+using static InnovEnergy.Lib.Protocols.Modbus.Clients.Endianness;
 
 namespace InnovEnergy.Lib.Protocols.Modbus.Clients;
 
 using UInt16s = IReadOnlyList<UInt16>;
 using Coils   = IReadOnlyList<Boolean>;
 
-
 public class ModbusTcpClient : ModbusClient
 {
     public const UInt16 DefaultPort = 502;
@@ -20,7 +20,7 @@ public class ModbusTcpClient : ModbusClient
     private UInt16 NextId() => unchecked(++_Id);
 
 
-    public ModbusTcpClient(ModbusConnection connection, Byte slaveId) : base(connection, slaveId)
+    public ModbusTcpClient(ModbusConnection connection, Byte slaveId, Endianness endianness = LittleEndian32BitIntegers | LittleEndian32Floats) : base(connection, slaveId, endianness)
     {
     }