diff --git a/ChangeLog b/ChangeLog
index e49e431..59dfdd4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -24,3 +24,9 @@
 + RTS RS-485 transmit/receive control
 * RTU response receiving by length
 * Standard error codes for receive error (04) and timeout (0x0B)
+
+0.2.1
+-----------
+08-jun-2015:
+
++ Added serial port mode configuration option (-m).
diff --git a/configure b/configure
index 6ad3e1a..39dffcd 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for mbusd 0.2.0.
+# Generated by GNU Autoconf 2.69 for mbusd 0.2.1.
 #
 #
 # Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
@@ -587,8 +587,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='mbusd'
 PACKAGE_TARNAME='mbusd'
-PACKAGE_VERSION='0.2.0'
-PACKAGE_STRING='mbusd 0.2.0'
+PACKAGE_VERSION='0.2.1'
+PACKAGE_STRING='mbusd 0.2.1'
 PACKAGE_BUGREPORT=''
 PACKAGE_URL=''
 
@@ -1317,7 +1317,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures mbusd 0.2.0 to adapt to many kinds of systems.
+\`configure' configures mbusd 0.2.1 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1387,7 +1387,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of mbusd 0.2.0:";;
+     short | recursive ) echo "Configuration of mbusd 0.2.1:";;
    esac
   cat <<\_ACEOF
 
@@ -1494,7 +1494,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-mbusd configure 0.2.0
+mbusd configure 0.2.1
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1772,7 +1772,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by mbusd $as_me 0.2.0, which was
+It was created by mbusd $as_me 0.2.1, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2635,7 +2635,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='mbusd'
- VERSION='0.2.0'
+ VERSION='0.2.1'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -13594,7 +13594,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by mbusd $as_me 0.2.0, which was
+This file was extended by mbusd $as_me 0.2.1, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -13660,7 +13660,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-mbusd config.status 0.2.0
+mbusd config.status 0.2.1
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.in b/configure.in
index 77f5bf1..30cc4b9 100644
--- a/configure.in
+++ b/configure.in
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT(mbusd, 0.2.0)
+AC_INIT(mbusd, 0.2.1)
 AM_INIT_AUTOMAKE
 AM_CONFIG_HEADER(config.h)
 
diff --git a/libtool b/libtool
index 1a41037..c3fd547 100755
--- a/libtool
+++ b/libtool
@@ -1,7 +1,7 @@
 #! /bin/sh
 
 # libtool - Provide generalized library-building support services.
-# Generated automatically by config.status (mbusd) 0.2.0
+# Generated automatically by config.status (mbusd) 0.2.1
 # Libtool was configured on host 3cky.office.mobileap.ru:
 # NOTE: Changes made to this file will be lost: look at ltmain.sh.
 #
@@ -275,7 +275,7 @@ hardcode_into_libs=yes
 sys_lib_search_path_spec="/usr/lib/gcc/x86_64-redhat-linux/4.9.2 /usr/lib64 /lib64 "
 
 # Run-time system search path for libraries.
-sys_lib_dlsearch_path_spec="/lib64 /usr/lib64 /lib /usr/lib /usr/lib64/R/lib /usr/lib64/atlas /usr/lib64/dyninst /usr/lib64/iscsi /usr/lib/llvm /usr/lib64/llvm /usr/lib64/mysql /usr/lib64/OGRE /usr/lib64/qt-3.3/lib /opt/Samsung/PSU/share/lib64 /usr/lib64/tcl8.6 /usr/lib64/vtk /usr/lib/xulrunner /usr/lib64/xulrunner "
+sys_lib_dlsearch_path_spec="/lib64 /usr/lib64 /lib /usr/lib /usr/lib64/R/lib /usr/lib64/atlas /usr/lib64/dyninst /usr/lib64/iscsi /usr/lib/llvm /usr/lib64/llvm /usr/lib64/mysql /usr/lib64/OGRE /usr/lib64/qt-3.3/lib /opt/Samsung/PSU/share/lib64 /usr/lib64/tcl8.6 /usr/lib64/vtk /usr/lib/wine/ /usr/lib64/wine/ /usr/lib/xulrunner /usr/lib64/xulrunner "
 
 # Whether dlopen is supported.
 dlopen_support=unknown