50 milleseconds a sleep between each modbus read

csharp/Lib/Protocols/Modbus/Slaves/ModbusDevice.cs

@@ -37,9 +37,12 @@ public class ModbusDevice<[DynamicallyAccessedMembers(All)] R> where R : notnull
 
     public R Read(R record)
     {
+        Console.WriteLine($"Reading { _Batches.Count } Modbus batches.");
         foreach (var batch in _Batches)
+        {
             batch.Read(record);
-        
+            Thread.Sleep(50); // this added mainly for Growatt reading
+        }
         return record;
     }