diff --git a/mbrtu/src/main/java/MainSlave.java b/mbrtu/src/main/java/MainSlave.java
index bce154f..5197223 100644
--- a/mbrtu/src/main/java/MainSlave.java
+++ b/mbrtu/src/main/java/MainSlave.java
@@ -31,7 +31,7 @@ public class MainSlave {
             serialParameters.setStopBits(1);
 
             slave = ModbusSlaveFactory.createModbusSlaveRTU(serialParameters);
-            slave.setReadTimeout(0); // if not set default timeout is 1000ms, I think this must be set to 0 (infinitive timeout)
+            slave.setReadTimeout(0);
             Modbus.setLogLevel(Modbus.LogLevel.LEVEL_DEBUG);
 
             MyOwnDataHolder dh = new MyOwnDataHolder();
@@ -82,14 +82,9 @@ public class MainSlave {
             ir.set(1,234);
             slave.getDataHolder().setInputRegisters(ir);
             slave.setServerAddress(1);
-            /*
-             * using master-branch it should be #slave.open();
-             */
+
             slave.listen();
 
-            /*
-             * since 1.2.8
-             */
             if (slave.isListening()) {
                 Runtime.getRuntime().addShutdownHook(new Thread() {
                     @Override
@@ -104,9 +99,6 @@ public class MainSlave {
                     slave.wait();
                 }
 
-                /*
-                 * using master-branch it should be #slave.close();
-                 */
                 slave.shutdown();
             }
         } catch (RuntimeException e) {