diff --git a/src/devtools/datool/pyserial/tools/miniterm.py b/src/devtools/datool/pyserial/tools/miniterm.py
new file mode 100644
index 0000000..186ac10
--- /dev/null
+++ b/src/devtools/datool/pyserial/tools/miniterm.py
@@ -0,0 +1,878 @@
+#!/usr/bin/env python
+#
+# Very simple serial terminal
+#
+# This file is part of pySerial. https://github.com/pyserial/pyserial
+# (C)2002-2015 Chris Liechti <cliechti@gmx.net>
+#
+# SPDX-License-Identifier:    BSD-3-Clause
+
+import codecs
+import os
+import sys
+import threading
+
+import pyserial as serial
+from pyserial.tools.list_ports import comports
+from pyserial.tools import hexlify_codec
+
+codecs.register(lambda c: hexlify_codec.getregentry() if c == 'hexlify' else None)
+
+try:
+    raw_input
+except NameError:
+    raw_input = input   # in python3 it's "raw"
+    unichr = chr
+
+
+def key_description(character):
+    """generate a readable description for a key"""
+    ascii_code = ord(character)
+    if ascii_code < 32:
+        return 'Ctrl+%c' % (ord('@') + ascii_code)
+    else:
+        return repr(character)
+
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+class ConsoleBase(object):
+    def __init__(self):
+        if sys.version_info >= (3, 0):
+            self.byte_output = sys.stdout.buffer
+        else:
+            self.byte_output = sys.stdout
+        self.output = sys.stdout
+
+    def setup(self):
+        pass
+
+    def cleanup(self):
+        pass
+
+    def getkey(self):
+        return None
+
+    def write_bytes(self, s):
+        self.byte_output.write(s)
+        self.byte_output.flush()
+
+    def write(self, s):
+        self.output.write(s)
+        self.output.flush()
+
+    #  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
+    # context manager:
+    # switch terminal temporary to normal mode (e.g. to get user input)
+
+    def __enter__(self):
+        self.cleanup()
+        return self
+
+    def __exit__(self, *args, **kwargs):
+        self.setup()
+
+
+if os.name == 'nt':
+    import msvcrt
+    import ctypes
+
+    class Out(object):
+        def __init__(self, fd):
+            self.fd = fd
+
+        def flush(self):
+            pass
+
+        def write(self, s):
+            os.write(self.fd, s)
+
+    class Console(ConsoleBase):
+        def __init__(self):
+            super(Console, self).__init__()
+            self._saved_ocp = ctypes.windll.kernel32.GetConsoleOutputCP()
+            self._saved_icp = ctypes.windll.kernel32.GetConsoleCP()
+            ctypes.windll.kernel32.SetConsoleOutputCP(65001)
+            ctypes.windll.kernel32.SetConsoleCP(65001)
+            self.output = codecs.getwriter('UTF-8')(Out(sys.stdout.fileno()), 'replace')
+            # the change of the code page is not propagated to Python, manually fix it
+            sys.stderr = codecs.getwriter('UTF-8')(Out(sys.stderr.fileno()), 'replace')
+            sys.stdout = self.output
+            self.output.encoding = 'UTF-8'  # needed for input
+
+        def __del__(self):
+            ctypes.windll.kernel32.SetConsoleOutputCP(self._saved_ocp)
+            ctypes.windll.kernel32.SetConsoleCP(self._saved_icp)
+
+        def getkey(self):
+            while True:
+                z = msvcrt.getwch()
+                if z == unichr(13):
+                    return unichr(10)
+                elif z in (unichr(0), unichr(0x0e)):    # functions keys, ignore
+                    msvcrt.getwch()
+                else:
+                    return z
+
+elif os.name == 'posix':
+    import atexit
+    import termios
+
+    class Console(ConsoleBase):
+        def __init__(self):
+            super(Console, self).__init__()
+            self.fd = sys.stdin.fileno()
+            self.old = termios.tcgetattr(self.fd)
+            atexit.register(self.cleanup)
+            if sys.version_info < (3, 0):
+                self.enc_stdin = codecs.getreader(sys.stdin.encoding)(sys.stdin)
+            else:
+                self.enc_stdin = sys.stdin
+
+        def setup(self):
+            new = termios.tcgetattr(self.fd)
+            new[3] = new[3] & ~termios.ICANON & ~termios.ECHO & ~termios.ISIG
+            new[6][termios.VMIN] = 1
+            new[6][termios.VTIME] = 0
+            termios.tcsetattr(self.fd, termios.TCSANOW, new)
+
+        def getkey(self):
+            c = self.enc_stdin.read(1)
+            if c == unichr(0x7f):
+                c = unichr(8)    # map the BS key (which yields DEL) to backspace
+            return c
+
+        def cleanup(self):
+            termios.tcsetattr(self.fd, termios.TCSAFLUSH, self.old)
+
+else:
+    raise NotImplementedError("Sorry no implementation for your platform (%s) available." % sys.platform)
+
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+class Transform(object):
+    """do-nothing: forward all data unchanged"""
+    def rx(self, text):
+        """text received from serial port"""
+        return text
+
+    def tx(self, text):
+        """text to be sent to serial port"""
+        return text
+
+    def echo(self, text):
+        """text to be sent but displayed on console"""
+        return text
+
+
+class CRLF(Transform):
+    """ENTER sends CR+LF"""
+
+    def tx(self, text):
+        return text.replace('\n', '\r\n')
+
+
+class CR(Transform):
+    """ENTER sends CR"""
+
+    def rx(self, text):
+        return text.replace('\r', '\n')
+
+    def tx(self, text):
+        return text.replace('\n', '\r')
+
+
+class LF(Transform):
+    """ENTER sends LF"""
+
+
+class NoTerminal(Transform):
+    """remove typical terminal control codes from input"""
+
+    REPLACEMENT_MAP = dict((x, 0x2400 + x) for x in range(32) if unichr(x) not in '\r\n\b\t')
+    REPLACEMENT_MAP.update({
+            0x7F: 0x2421,  # DEL
+            0x9B: 0x2425,  # CSI
+            })
+
+    def rx(self, text):
+        return text.translate(self.REPLACEMENT_MAP)
+
+    echo = rx
+
+
+class NoControls(NoTerminal):
+    """Remove all control codes, incl. CR+LF"""
+
+    REPLACEMENT_MAP = dict((x, 0x2400 + x) for x in range(32))
+    REPLACEMENT_MAP.update({
+            32: 0x2423,    # visual space
+            0x7F: 0x2421,  # DEL
+            0x9B: 0x2425,  # CSI
+            })
+
+
+class Printable(Transform):
+    """Show decimal code for all non-ASCII characters and replace most control codes"""
+
+    def rx(self, text):
+        r = []
+        for t in text:
+            if ' ' <= t < '\x7f' or t in '\r\n\b\t':
+                r.append(t)
+            elif t < ' ':
+                r.append(unichr(0x2400 + ord(t)))
+            else:
+                r.extend(unichr(0x2080 + ord(d) - 48) for d in '{:d}'.format(ord(t)))
+                r.append(' ')
+        return ''.join(r)
+
+    echo = rx
+
+
+class Colorize(Transform):
+    """Apply different colors for received and echo"""
+
+    def __init__(self):
+        # XXX make it configurable, use colorama?
+        self.input_color = '\x1b[37m'
+        self.echo_color = '\x1b[31m'
+
+    def rx(self, text):
+        return self.input_color + text
+
+    def echo(self, text):
+        return self.echo_color + text
+
+
+class DebugIO(Transform):
+    """Print what is sent and received"""
+
+    def rx(self, text):
+        sys.stderr.write(' [RX:{}] '.format(repr(text)))
+        sys.stderr.flush()
+        return text
+
+    def tx(self, text):
+        sys.stderr.write(' [TX:{}] '.format(repr(text)))
+        sys.stderr.flush()
+        return text
+
+
+# other ideas:
+# - add date/time for each newline
+# - insert newline after: a) timeout b) packet end character
+
+EOL_TRANSFORMATIONS = {
+        'crlf': CRLF,
+        'cr': CR,
+        'lf': LF,
+        }
+
+TRANSFORMATIONS = {
+        'direct': Transform,    # no transformation
+        'default': NoTerminal,
+        'nocontrol': NoControls,
+        'printable': Printable,
+        'colorize': Colorize,
+        'debug': DebugIO,
+        }
+
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+def ask_for_port():
+    """\
+    Show a list of ports and ask the user for a choice. To make selection
+    easier on systems with long device names, also allow the input of an
+    index.
+    """
+    sys.stderr.write('\n--- Available ports:\n')
+    ports = []
+    for n, (port, desc, hwid) in enumerate(sorted(comports()), 1):
+        #~ sys.stderr.write('--- %-20s %s [%s]\n' % (port, desc, hwid))
+        sys.stderr.write('--- {:2}: {:20} {}\n'.format(n, port, desc))
+        ports.append(port)
+    while True:
+        port = raw_input('--- Enter port index or full name: ')
+        try:
+            index = int(port) - 1
+            if not 0 <= index < len(ports):
+                sys.stderr.write('--- Invalid index!\n')
+                continue
+        except ValueError:
+            pass
+        else:
+            port = ports[index]
+        return port
+
+
+class Miniterm(object):
+    """\
+    Terminal application. Copy data from serial port to console and vice versa.
+    Handle special keys from the console to show menu etc.
+    """
+
+    def __init__(self, serial_instance, echo=False, eol='crlf', filters=()):
+        self.console = Console()
+        self.serial = serial_instance
+        self.echo = echo
+        self.raw = False
+        self.input_encoding = 'UTF-8'
+        self.output_encoding = 'UTF-8'
+        self.eol = eol
+        self.filters = filters
+        self.update_transformations()
+        self.exit_character = 0x1d  # GS/CTRL+]
+        self.menu_character = 0x14  # Menu: CTRL+T
+
+    def _start_reader(self):
+        """Start reader thread"""
+        self._reader_alive = True
+        # start serial->console thread
+        self.receiver_thread = threading.Thread(target=self.reader, name='rx')
+        self.receiver_thread.daemon = True
+        self.receiver_thread.start()
+
+    def _stop_reader(self):
+        """Stop reader thread only, wait for clean exit of thread"""
+        self._reader_alive = False
+        self.receiver_thread.join()
+
+    def start(self):
+        self.alive = True
+        self._start_reader()
+        # enter console->serial loop
+        self.transmitter_thread = threading.Thread(target=self.writer, name='tx')
+        self.transmitter_thread.daemon = True
+        self.transmitter_thread.start()
+        self.console.setup()
+
+    def stop(self):
+        self.alive = False
+
+    def join(self, transmit_only=False):
+        self.transmitter_thread.join()
+        if not transmit_only:
+            self.receiver_thread.join()
+
+    def update_transformations(self):
+        transformations = [EOL_TRANSFORMATIONS[self.eol]] + [TRANSFORMATIONS[f] for f in self.filters]
+        self.tx_transformations = [t() for t in transformations]
+        self.rx_transformations = list(reversed(self.tx_transformations))
+
+    def set_rx_encoding(self, encoding, errors='replace'):
+        self.input_encoding = encoding
+        self.rx_decoder = codecs.getincrementaldecoder(encoding)(errors)
+
+    def set_tx_encoding(self, encoding, errors='replace'):
+        self.output_encoding = encoding
+        self.tx_encoder = codecs.getincrementalencoder(encoding)(errors)
+
+    def dump_port_settings(self):
+        sys.stderr.write("\n--- Settings: {p.name}  {p.baudrate},{p.bytesize},{p.parity},{p.stopbits}\n".format(
+                p=self.serial))
+        sys.stderr.write('--- RTS: {:8}  DTR: {:8}  BREAK: {:8}\n'.format(
+                ('active' if self.serial.rts else 'inactive'),
+                ('active' if self.serial.dtr else 'inactive'),
+                ('active' if self.serial.break_condition else 'inactive')))
+        try:
+            sys.stderr.write('--- CTS: {:8}  DSR: {:8}  RI: {:8}  CD: {:8}\n'.format(
+                    ('active' if self.serial.cts else 'inactive'),
+                    ('active' if self.serial.dsr else 'inactive'),
+                    ('active' if self.serial.ri else 'inactive'),
+                    ('active' if self.serial.cd else 'inactive')))
+        except serial.SerialException:
+            # on RFC 2217 ports, it can happen if no modem state notification was
+            # yet received. ignore this error.
+            pass
+        sys.stderr.write('--- software flow control: {}\n'.format('active' if self.serial.xonxoff else 'inactive'))
+        sys.stderr.write('--- hardware flow control: {}\n'.format('active' if self.serial.rtscts else 'inactive'))
+        #~ sys.stderr.write('--- data escaping: %s  linefeed: %s\n' % (
+                #~ REPR_MODES[self.repr_mode],
+                #~ LF_MODES[self.convert_outgoing]))
+        sys.stderr.write('--- serial input encoding: {}\n'.format(self.input_encoding))
+        sys.stderr.write('--- serial output encoding: {}\n'.format(self.output_encoding))
+        sys.stderr.write('--- EOL: {}\n'.format(self.eol.upper()))
+        sys.stderr.write('--- filters: {}\n'.format(' '.join(self.filters)))
+
+    def reader(self):
+        """loop and copy serial->console"""
+        try:
+            while self.alive and self._reader_alive:
+                # read all that is there or wait for one byte
+                data = self.serial.read(self.serial.in_waiting or 1)
+                if data:
+                    if self.raw:
+                        self.console.write_bytes(data)
+                    else:
+                        text = self.rx_decoder.decode(data)
+                        for transformation in self.rx_transformations:
+                            text = transformation.rx(text)
+                        self.console.write(text)
+        except serial.SerialException:
+            self.alive = False
+            # XXX would be nice if the writer could be interrupted at this
+            #     point... to exit completely
+            raise
+
+    def writer(self):
+        """\
+        Loop and copy console->serial until self.exit_character character is
+        found. When self.menu_character is found, interpret the next key
+        locally.
+        """
+        menu_active = False
+        try:
+            while self.alive:
+                try:
+                    c = self.console.getkey()
+                except KeyboardInterrupt:
+                    c = '\x03'
+                if menu_active:
+                    self.handle_menu_key(c)
+                    menu_active = False
+                elif c == self.menu_character:
+                    menu_active = True      # next char will be for menu
+                elif c == self.exit_character:
+                    self.stop()             # exit app
+                    break
+                else:
+                    #~ if self.raw:
+                    text = c
+                    for transformation in self.tx_transformations:
+                        text = transformation.tx(text)
+                    self.serial.write(self.tx_encoder.encode(text))
+                    if self.echo:
+                        echo_text = c
+                        for transformation in self.tx_transformations:
+                            echo_text = transformation.echo(echo_text)
+                        self.console.write(echo_text)
+        except:
+            self.alive = False
+            raise
+
+    def handle_menu_key(self, c):
+        """Implement a simple menu / settings"""
+        if c == self.menu_character or c == self.exit_character:
+            # Menu/exit character again -> send itself
+            self.serial.write(self.tx_encoder.encode(c))
+            if self.echo:
+                self.console.write(c)
+        elif c == '\x15':                       # CTRL+U -> upload file
+            sys.stderr.write('\n--- File to upload: ')
+            sys.stderr.flush()
+            with self.console:
+                filename = sys.stdin.readline().rstrip('\r\n')
+                if filename:
+                    try:
+                        with open(filename, 'rb') as f:
+                            sys.stderr.write('--- Sending file {} ---\n'.format(filename))
+                            while True:
+                                block = f.read(1024)
+                                if not block:
+                                    break
+                                self.serial.write(block)
+                                # Wait for output buffer to drain.
+                                self.serial.flush()
+                                sys.stderr.write('.')   # Progress indicator.
+                        sys.stderr.write('\n--- File {} sent ---\n'.format(filename))
+                    except IOError as e:
+                        sys.stderr.write('--- ERROR opening file {}: {} ---\n'.format(filename, e))
+        elif c in '\x08hH?':                    # CTRL+H, h, H, ? -> Show help
+            sys.stderr.write(self.get_help_text())
+        elif c == '\x12':                       # CTRL+R -> Toggle RTS
+            self.serial.rts = not self.serial.rts
+            sys.stderr.write('--- RTS {} ---\n'.format('active' if self.serial.rts else 'inactive'))
+        elif c == '\x04':                       # CTRL+D -> Toggle DTR
+            self.serial.dtr = not self.serial.dtr
+            sys.stderr.write('--- DTR {} ---\n'.format('active' if self.serial.dtr else 'inactive'))
+        elif c == '\x02':                       # CTRL+B -> toggle BREAK condition
+            self.serial.break_condition = not self.serial.break_condition
+            sys.stderr.write('--- BREAK {} ---\n'.format('active' if self.serial.break_condition else 'inactive'))
+        elif c == '\x05':                       # CTRL+E -> toggle local echo
+            self.echo = not self.echo
+            sys.stderr.write('--- local echo {} ---\n'.format('active' if self.echo else 'inactive'))
+        elif c == '\x06':                       # CTRL+F -> edit filters
+            sys.stderr.write('\n--- Available Filters:\n')
+            sys.stderr.write('\n'.join(
+                    '---   {:<10} = {.__doc__}'.format(k, v)
+                    for k, v in sorted(TRANSFORMATIONS.items())))
+            sys.stderr.write('\n--- Enter new filter name(s) [{}]: '.format(' '.join(self.filters)))
+            with self.console:
+                new_filters = sys.stdin.readline().lower().split()
+            if new_filters:
+                for f in new_filters:
+                    if f not in TRANSFORMATIONS:
+                        sys.stderr.write('--- unknown filter: {}'.format(repr(f)))
+                        break
+                else:
+                    self.filters = new_filters
+                    self.update_transformations()
+            sys.stderr.write('--- filters: {}\n'.format(' '.join(self.filters)))
+        elif c == '\x0c':                       # CTRL+L -> EOL mode
+            modes = list(EOL_TRANSFORMATIONS)  # keys
+            eol = modes.index(self.eol) + 1
+            if eol >= len(modes):
+                eol = 0
+            self.eol = modes[eol]
+            sys.stderr.write('--- EOL: {} ---\n'.format(self.eol.upper()))
+            self.update_transformations()
+        elif c == '\x01':                       # CTRL+A -> set encoding
+            sys.stderr.write('\n--- Enter new encoding name [{}]: '.format(self.input_encoding))
+            with self.console:
+                new_encoding = sys.stdin.readline().strip()
+            if new_encoding:
+                try:
+                    codecs.lookup(new_encoding)
+                except LookupError:
+                    sys.stderr.write('--- invalid encoding name: {}\n'.format(new_encoding))
+                else:
+                    self.set_rx_encoding(new_encoding)
+                    self.set_tx_encoding(new_encoding)
+            sys.stderr.write('--- serial input encoding: {}\n'.format(self.input_encoding))
+            sys.stderr.write('--- serial output encoding: {}\n'.format(self.output_encoding))
+        elif c == '\x09':                       # CTRL+I -> info
+            self.dump_port_settings()
+        #~ elif c == '\x01':                       # CTRL+A -> cycle escape mode
+        #~ elif c == '\x0c':                       # CTRL+L -> cycle linefeed mode
+        elif c in 'pP':                         # P -> change port
+            with self.console:
+                try:
+                    port = ask_for_port()
+                except KeyboardInterrupt:
+                    port = None
+            if port and port != self.serial.port:
+                # reader thread needs to be shut down
+                self._stop_reader()
+                # save settings
+                settings = self.serial.getSettingsDict()
+                try:
+                    new_serial = serial.serial_for_url(port, do_not_open=True)
+                    # restore settings and open
+                    new_serial.applySettingsDict(settings)
+                    new_serial.rts = self.serial.rts
+                    new_serial.dtr = self.serial.dtr
+                    new_serial.open()
+                    new_serial.break_condition = self.serial.break_condition
+                except Exception as e:
+                    sys.stderr.write('--- ERROR opening new port: {} ---\n'.format(e))
+                    new_serial.close()
+                else:
+                    self.serial.close()
+                    self.serial = new_serial
+                    sys.stderr.write('--- Port changed to: {} ---\n'.format(self.serial.port))
+                # and restart the reader thread
+                self._start_reader()
+        elif c in 'bB':                         # B -> change baudrate
+            sys.stderr.write('\n--- Baudrate: ')
+            sys.stderr.flush()
+            with self.console:
+                backup = self.serial.baudrate
+                try:
+                    self.serial.baudrate = int(sys.stdin.readline().strip())
+                except ValueError as e:
+                    sys.stderr.write('--- ERROR setting baudrate: %s ---\n'.format(e))
+                    self.serial.baudrate = backup
+                else:
+                    self.dump_port_settings()
+        elif c == '8':                          # 8 -> change to 8 bits
+            self.serial.bytesize = serial.EIGHTBITS
+            self.dump_port_settings()
+        elif c == '7':                          # 7 -> change to 8 bits
+            self.serial.bytesize = serial.SEVENBITS
+            self.dump_port_settings()
+        elif c in 'eE':                         # E -> change to even parity
+            self.serial.parity = serial.PARITY_EVEN
+            self.dump_port_settings()
+        elif c in 'oO':                         # O -> change to odd parity
+            self.serial.parity = serial.PARITY_ODD
+            self.dump_port_settings()
+        elif c in 'mM':                         # M -> change to mark parity
+            self.serial.parity = serial.PARITY_MARK
+            self.dump_port_settings()
+        elif c in 'sS':                         # S -> change to space parity
+            self.serial.parity = serial.PARITY_SPACE
+            self.dump_port_settings()
+        elif c in 'nN':                         # N -> change to no parity
+            self.serial.parity = serial.PARITY_NONE
+            self.dump_port_settings()
+        elif c == '1':                          # 1 -> change to 1 stop bits
+            self.serial.stopbits = serial.STOPBITS_ONE
+            self.dump_port_settings()
+        elif c == '2':                          # 2 -> change to 2 stop bits
+            self.serial.stopbits = serial.STOPBITS_TWO
+            self.dump_port_settings()
+        elif c == '3':                          # 3 -> change to 1.5 stop bits
+            self.serial.stopbits = serial.STOPBITS_ONE_POINT_FIVE
+            self.dump_port_settings()
+        elif c in 'xX':                         # X -> change software flow control
+            self.serial.xonxoff = (c == 'X')
+            self.dump_port_settings()
+        elif c in 'rR':                         # R -> change hardware flow control
+            self.serial.rtscts = (c == 'R')
+            self.dump_port_settings()
+        else:
+            sys.stderr.write('--- unknown menu character {} --\n'.format(key_description(c)))
+
+    def get_help_text(self):
+        # help text, starts with blank line!
+        return """
+--- pySerial ({version}) - miniterm - help
+---
+--- {exit:8} Exit program
+--- {menu:8} Menu escape key, followed by:
+--- Menu keys:
+---    {menu:7} Send the menu character itself to remote
+---    {exit:7} Send the exit character itself to remote
+---    {info:7} Show info
+---    {upload:7} Upload file (prompt will be shown)
+---    {repr:7} encoding
+---    {filter:7} edit filters
+--- Toggles:
+---    {rts:7} RTS   {dtr:7} DTR   {brk:7} BREAK
+---    {echo:7} echo  {eol:7} EOL
+---
+--- Port settings ({menu} followed by the following):
+---    p          change port
+---    7 8        set data bits
+---    N E O S M  change parity (None, Even, Odd, Space, Mark)
+---    1 2 3      set stop bits (1, 2, 1.5)
+---    b          change baud rate
+---    x X        disable/enable software flow control
+---    r R        disable/enable hardware flow control
+""".format(
+                version=getattr(serial, 'VERSION', 'unknown version'),
+                exit=key_description(self.exit_character),
+                menu=key_description(self.menu_character),
+                rts=key_description('\x12'),
+                dtr=key_description('\x04'),
+                brk=key_description('\x02'),
+                echo=key_description('\x05'),
+                info=key_description('\x09'),
+                upload=key_description('\x15'),
+                repr=key_description('\x01'),
+                filter=key_description('\x06'),
+                eol=key_description('\x0c'),
+                )
+
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+# default args can be used to override when calling main() from an other script
+# e.g to create a miniterm-my-device.py
+def main(default_port=None, default_baudrate=9600, default_rts=None, default_dtr=None):
+    import argparse
+
+    parser = argparse.ArgumentParser(
+            description="Miniterm - A simple terminal program for the serial port.")
+
+    parser.add_argument(
+            "port",
+            nargs='?',
+            help="serial port name ('-' to show port list)",
+            default=default_port)
+
+    parser.add_argument(
+            "baudrate",
+            nargs='?',
+            type=int,
+            help="set baud rate, default: %(default)s",
+            default=default_baudrate)
+
+    group = parser.add_argument_group("port settings")
+
+    group.add_argument(
+            "--parity",
+            choices=['N', 'E', 'O', 'S', 'M'],
+            type=lambda c: c.upper(),
+            help="set parity, one of {N E O S M}, default: N",
+            default='N')
+
+    group.add_argument(
+            "--rtscts",
+            action="store_true",
+            help="enable RTS/CTS flow control (default off)",
+            default=False)
+
+    group.add_argument(
+            "--xonxoff",
+            action="store_true",
+            help="enable software flow control (default off)",
+            default=False)
+
+    group.add_argument(
+            "--rts",
+            type=int,
+            help="set initial RTS line state (possible values: 0, 1)",
+            default=default_rts)
+
+    group.add_argument(
+            "--dtr",
+            type=int,
+            help="set initial DTR line state (possible values: 0, 1)",
+            default=default_dtr)
+
+    group.add_argument(
+            "--ask",
+            action="store_true",
+            help="ask again for port when open fails",
+            default=False)
+
+    group = parser.add_argument_group("data handling")
+
+    group.add_argument(
+            "-e", "--echo",
+            action="store_true",
+            help="enable local echo (default off)",
+            default=False)
+
+    group.add_argument(
+            "--encoding",
+            dest="serial_port_encoding",
+            metavar="CODEC",
+            help="set the encoding for the serial port (e.g. hexlify, Latin1, UTF-8), default: %(default)s",
+            default='UTF-8')
+
+    group.add_argument(
+            "-f", "--filter",
+            action="append",
+            metavar="NAME",
+            help="add text transformation",
+            default=[])
+
+    group.add_argument(
+            "--eol",
+            choices=['CR', 'LF', 'CRLF'],
+            type=lambda c: c.upper(),
+            help="end of line mode",
+            default='CRLF')
+
+    group.add_argument(
+            "--raw",
+            action="store_true",
+            help="Do no apply any encodings/transformations",
+            default=False)
+
+    group = parser.add_argument_group("hotkeys")
+
+    group.add_argument(
+            "--exit-char",
+            type=int,
+            metavar='NUM',
+            help="Unicode of special character that is used to exit the application, default: %(default)s",
+            default=0x1d  # GS/CTRL+]
+            )
+
+    group.add_argument(
+            "--menu-char",
+            type=int,
+            metavar='NUM',
+            help="Unicode code of special character that is used to control miniterm (menu), default: %(default)s",
+            default=0x14  # Menu: CTRL+T
+            )
+
+    group = parser.add_argument_group("diagnostics")
+
+    group.add_argument(
+            "-q", "--quiet",
+            action="store_true",
+            help="suppress non-error messages",
+            default=False)
+
+    group.add_argument(
+            "--develop",
+            action="store_true",
+            help="show Python traceback on error",
+            default=False)
+
+    args = parser.parse_args()
+
+    if args.menu_char == args.exit_char:
+        parser.error('--exit-char can not be the same as --menu-char')
+
+    if args.filter:
+        if 'help' in args.filter:
+            sys.stderr.write('Available filters:\n')
+            sys.stderr.write('\n'.join(
+                    '{:<10} = {.__doc__}'.format(k, v)
+                    for k, v in sorted(TRANSFORMATIONS.items())))
+            sys.stderr.write('\n')
+            sys.exit(1)
+        filters = args.filter
+    else:
+        filters = ['default']
+
+    while True:
+        # no port given on command line -> ask user now
+        if args.port is None or args.port == '-':
+            try:
+                args.port = ask_for_port()
+            except KeyboardInterrupt:
+                sys.stderr.write('\n')
+                parser.error('user aborted and port is not given')
+            else:
+                if not args.port:
+                    parser.error('port is not given')
+        try:
+            serial_instance = serial.serial_for_url(
+                    args.port,
+                    args.baudrate,
+                    parity=args.parity,
+                    rtscts=args.rtscts,
+                    xonxoff=args.xonxoff,
+                    timeout=1,
+                    do_not_open=True)
+
+            if args.dtr is not None:
+                if not args.quiet:
+                    sys.stderr.write('--- forcing DTR {}\n'.format('active' if args.dtr else 'inactive'))
+                serial_instance.dtr = args.dtr
+            if args.rts is not None:
+                if not args.quiet:
+                    sys.stderr.write('--- forcing RTS {}\n'.format('active' if args.rts else 'inactive'))
+                serial_instance.rts = args.rts
+
+            serial_instance.open()
+        except serial.SerialException as e:
+            sys.stderr.write('could not open port {}: {}\n'.format(repr(args.port), e))
+            if args.develop:
+                raise
+            if not args.ask:
+                sys.exit(1)
+            else:
+                args.port = '-'
+        else:
+            break
+
+    miniterm = Miniterm(
+            serial_instance,
+            echo=args.echo,
+            eol=args.eol.lower(),
+            filters=filters)
+    miniterm.exit_character = unichr(args.exit_char)
+    miniterm.menu_character = unichr(args.menu_char)
+    miniterm.raw = args.raw
+    miniterm.set_rx_encoding(args.serial_port_encoding)
+    miniterm.set_tx_encoding(args.serial_port_encoding)
+
+    if not args.quiet:
+        sys.stderr.write('--- Miniterm on {p.name}  {p.baudrate},{p.bytesize},{p.parity},{p.stopbits} ---\n'.format(
+                p=miniterm.serial))
+        sys.stderr.write('--- Quit: {} | Menu: {} | Help: {} followed by {} ---\n'.format(
+                key_description(miniterm.exit_character),
+                key_description(miniterm.menu_character),
+                key_description(miniterm.menu_character),
+                key_description('\x08'),
+                ))
+
+    miniterm.start()
+    try:
+        miniterm.join(True)
+    except KeyboardInterrupt:
+        pass
+    if not args.quiet:
+        sys.stderr.write("\n--- exit ---\n")
+    miniterm.join()
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+if __name__ == '__main__':
+    main()