diff --git a/lib/logitech_receiver/common.py b/lib/logitech_receiver/common.py
index 3be447b1..cab8a650 100644
--- a/lib/logitech_receiver/common.py
+++ b/lib/logitech_receiver/common.py
@@ -21,6 +21,8 @@
 from binascii import hexlify as _hexlify
 from collections import namedtuple
 
+import yaml as _yaml
+
 is_string = lambda d: isinstance(d, str)
 
 #
@@ -28,6 +30,38 @@ is_string = lambda d: isinstance(d, str)
 #
 
 
+def crc16(data: bytes):
+    '''
+    CRC-16 (CCITT) implemented with a precomputed lookup table
+    '''
+    table = [
+        0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, 0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE,
+        0xF1EF, 0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, 0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C,
+        0xF3FF, 0xE3DE, 0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, 0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE,
+        0xF5CF, 0xC5AC, 0xD58D, 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4, 0xB75B, 0xA77A, 0x9719, 0x8738,
+        0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, 0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, 0xC9CC, 0xD9ED, 0xE98E,
+        0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, 0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, 0xDBFD, 0xCBDC,
+        0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, 0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, 0xEDAE,
+        0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
+        0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, 0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E,
+        0xE16F, 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C,
+        0xE37F, 0xF35E, 0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, 0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E,
+        0xE54F, 0xD52C, 0xC50D, 0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xA7DB, 0xB7FA, 0x8799, 0x97B8,
+        0xE75F, 0xF77E, 0xC71D, 0xD73C, 0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, 0xD94C, 0xC96D, 0xF90E,
+        0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB, 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, 0xCB7D, 0xDB5C,
+        0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, 0xFD2E,
+        0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, 0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
+        0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, 0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1,
+        0x1EF0
+    ]
+
+    crc = 0xFFFF
+    for byte in data:
+        crc = (crc << 8) ^ table[(crc >> 8) ^ byte]
+        crc &= 0xFFFF  # important, crc must stay 16bits all the way through
+    return crc
+
+
 class NamedInt(int):
     """A regular Python integer with an attached name.
 
@@ -68,6 +102,19 @@ class NamedInt(int):
     def __repr__(self):
         return 'NamedInt(%d, %r)' % (int(self), self.name)
 
+    @classmethod
+    def from_yaml(cls, loader, node):
+        args = loader.construct_mapping(node)
+        return cls(value=args['value'], name=args['name'])
+
+    @classmethod
+    def to_yaml(cls, dumper, data):
+        return dumper.represent_mapping('!NamedInt', {'value': int(data), 'name': data.name}, flow_style=True)
+
+
+_yaml.SafeLoader.add_constructor('!NamedInt', NamedInt.from_yaml)
+_yaml.add_representer(NamedInt, NamedInt.to_yaml)
+
 
 class NamedInts:
     """An ordered set of NamedInt values.
diff --git a/lib/logitech_receiver/device.py b/lib/logitech_receiver/device.py
index 106964e7..d3b8977d 100644
--- a/lib/logitech_receiver/device.py
+++ b/lib/logitech_receiver/device.py
@@ -79,9 +79,7 @@ class Device:
         self._remap_keys = None
         self._gestures = None
         self._gestures_lock = _threading.Lock()
-        self._backlight = None
-        self._registers = None
-        self._settings = None
+        self._profiles = self._backlight = self._registers = self._settings = None
         self._feature_settings_checked = False
         self._settings_lock = _threading.Lock()
         self._polling_rate = None
@@ -323,6 +321,13 @@ class Device:
                 self._backlight = _hidpp20.get_backlight(self)
         return self._backlight
 
+    @property
+    def profiles(self):
+        if self._profiles is None:
+            if self.online and self.protocol >= 2.0:
+                self._profiles = _hidpp20.get_profiles(self)
+        return self._profiles
+
     @property
     def registers(self):
         if not self._registers:
diff --git a/lib/logitech_receiver/hidpp20.py b/lib/logitech_receiver/hidpp20.py
index 0b9325ee..aba4a3f9 100644
--- a/lib/logitech_receiver/hidpp20.py
+++ b/lib/logitech_receiver/hidpp20.py
@@ -29,6 +29,8 @@ from struct import pack as _pack
 from struct import unpack as _unpack
 from typing import List
 
+import yaml as _yaml
+
 from . import special_keys
 from .common import BATTERY_APPROX as _BATTERY_APPROX
 from .common import FirmwareInfo as _FirmwareInfo
@@ -37,6 +39,7 @@ from .common import NamedInt as _NamedInt
 from .common import NamedInts as _NamedInts
 from .common import UnsortedNamedInts as _UnsortedNamedInts
 from .common import bytes2int as _bytes2int
+from .common import crc16 as _crc16
 from .common import int2bytes as _int2bytes
 
 _log = getLogger(__name__)
@@ -1141,6 +1144,286 @@ class Backlight:
         self.device.feature_request(FEATURE.BACKLIGHT2, 0x10, data_bytes)
 
 
+ButtonBehaviors = _NamedInts(MacroExecute=0x0, MacroStop=0x1, MacroStopAll=0x2, Send=0x8, Function=0x9)
+ButtonMappingTypes = _NamedInts(No_Action=0x0, Button=0x1, Modifier_And_Key=0x2, Consumer_Key=0x3)
+ButtonFunctions = _NamedInts(
+    No_Action=0x0,
+    Tilt_Left=0x1,
+    Tilt_Right=0x2,
+    Next_DPI=0x3,
+    Previous_DPI=0x4,
+    Cycle_DPI=0x5,
+    Default_DPI=0x6,
+    Shift_DPI=0x7,
+    Next_Profile=0x8,
+    Previous_Profile=0x9,
+    Cycle_Profile=0xA,
+    G_Shift=0xB,
+    Battery_Status=0xC
+)
+ButtonButtons = special_keys.MOUSE_BUTTONS
+ButtonModifiers = special_keys.modifiers
+ButtonKeys = special_keys.USB_HID_KEYCODES
+ButtonConsumerKeys = special_keys.HID_CONSUMERCODES
+
+
+class Button:
+    """A button mapping"""
+
+    def __init__(self, **kwargs):
+        self.behavior = None
+        for key, val in kwargs.items():
+            setattr(self, key, val)
+
+    @classmethod
+    def from_yaml(cls, loader, node):
+        args = loader.construct_mapping(node)
+        return cls(**args)
+
+    @classmethod
+    def to_yaml(cls, dumper, data):
+        return dumper.represent_mapping('!Button', data.__dict__, flow_style=True)
+
+    @classmethod
+    def from_bytes(cls, bytes):
+        behavior = ButtonBehaviors[bytes[0] >> 4]
+        if behavior == ButtonBehaviors.MacroExecute or behavior == ButtonBehaviors.MacroStop:
+            sector = (bytes[0] & 0x0F) << 8 + bytes[1]
+            address = bytes[2] << 8 + bytes[3]
+            result = cls(behavior=behavior, sector=sector, address=address)
+        elif behavior == ButtonBehaviors.Send:
+            mapping_type = ButtonMappingTypes[bytes[1]]
+            if mapping_type == ButtonMappingTypes.Button:
+                value = ButtonButtons[(bytes[2] << 8) + bytes[3]]
+                result = cls(behavior=behavior, type=mapping_type, value=value)
+            elif mapping_type == ButtonMappingTypes.Modifier_And_Key:
+                modifiers = ButtonModifiers[bytes[2]]
+                value = ButtonKeys[bytes[3]]
+                result = cls(behavior=behavior, type=mapping_type, modifiers=modifiers, value=value)
+            elif mapping_type == ButtonMappingTypes.Consumer_Key:
+                value = ButtonConsumerKeys[(bytes[2] << 8) + bytes[3]]
+                result = cls(behavior=behavior, type=mapping_type, value=value)
+        elif behavior == ButtonBehaviors.Function:
+            value = ButtonFunctions[bytes[1]]
+            result = cls(behavior=behavior, value=value)
+        else:
+            result = cls(behavior=None)
+        return result
+
+    def to_bytes(self):
+        bytes = _int2bytes(self.behavior << 4, 1) if self.behavior is not None else None
+        if self.behavior == ButtonBehaviors.MacroExecute or self.behavior == ButtonBehaviors.MacroStop:
+            bytes = _int2bytes(self.sector, 2) + _int2bytes(self.address, 2)
+            bytes[0] += self.behavior << 4
+        elif self.behavior == ButtonBehaviors.Send:
+            bytes += _int2bytes(self.type, 1)
+            if self.type == ButtonMappingTypes.Button:
+                bytes += _int2bytes(self.value, 2)
+            elif self.type == ButtonMappingTypes.Modifier_And_Key:
+                bytes += _int2bytes(self.modifiers, 1)
+                bytes += _int2bytes(self.value, 1)
+            elif self.type == ButtonMappingTypes.Consumer_Key:
+                bytes += _int2bytes(self.value, 2)
+        elif self.behavior == ButtonBehaviors.Function:
+            bytes += _int2bytes(self.value, 1) + b'\xff\x00'
+        else:
+            bytes = b'\xff\xff\xff\xff'
+        return bytes
+
+    def __repr__(self):
+        return '%s{%s}' % (
+            self.__class__.__name__, ', '.join([str(key) + ':' + str(val) for key, val in self.__dict__.items()])
+        )
+
+
+_yaml.SafeLoader.add_constructor('!Button', Button.from_yaml)
+_yaml.add_representer(Button, Button.to_yaml)
+
+
+# Doesn't handle light information (feature x8070)
+class OnboardProfile:
+    """A single onboard profile"""
+
+    def __init__(self, **kwargs):
+        for key, val in kwargs.items():
+            setattr(self, key, val)
+
+    @classmethod
+    def from_yaml(cls, loader, node):
+        args = loader.construct_mapping(node)
+        return cls(**args)
+
+    @classmethod
+    def to_yaml(cls, dumper, data):
+        return dumper.represent_mapping('!OnboardProfile', data.__dict__)
+
+    @classmethod
+    def from_bytes(cls, sector, enabled, buttons, gbuttons, bytes):
+        return cls(
+            sector=sector,
+            enabled=enabled,
+            report_rate=bytes[0],
+            resolution_default_index=bytes[1],
+            resolution_shift_index=bytes[2],
+            resolutions=[_unpack('<H', bytes[i * 2 + 3:i * 2 + 5])[0] for i in range(0, 5)],
+            red=bytes[13],
+            green=bytes[14],
+            blue=bytes[15],
+            power_mode=bytes[16],
+            angle_snap=bytes[17],
+            buttons=[Button.from_bytes(bytes[32 + i * 4:32 + i * 4 + 4]) for i in range(0, buttons)],
+            gbuttons=[Button.from_bytes(bytes[96 + i * 4:96 + i * 4 + 4]) for i in range(0, gbuttons)],
+            name=bytes[160:208].decode('utf-16-be').rstrip('\x00').rstrip('\uFFFF'),
+            lighting=bytes[208:len(bytes) - 2]
+        )
+
+    @classmethod
+    def from_dev(cls, dev, i, sector, s, enabled, buttons, gbuttons):
+        bytes = OnboardProfiles.read_sector(dev, sector, s)
+        return cls.from_bytes(sector, enabled, buttons, gbuttons, bytes)
+
+    def to_bytes(self, length):
+        bytes = _int2bytes(self.report_rate, 1)
+        bytes += _int2bytes(self.resolution_default_index, 1) + _int2bytes(self.resolution_shift_index, 1)
+        bytes += b''.join([self.resolutions[i].to_bytes(2, 'little') for i in range(0, 5)])
+        bytes += _int2bytes(self.red, 1) + _int2bytes(self.green, 1) + _int2bytes(self.blue, 1)
+        bytes += _int2bytes(self.power_mode, 1) + _int2bytes(self.angle_snap, 1) + b'\xff' * 14
+        for i in range(0, 16):
+            bytes += self.buttons[i].to_bytes() if i < len(self.buttons) else b'\xff\xff\xff\xff'
+        for i in range(0, 16):
+            bytes += self.gbuttons[i].to_bytes() if i < len(self.gbuttons) else b'\xff\xff\xff\xff'
+        if self.enabled:
+            bytes += self.name[0:24].ljust(24, '\x00').encode('utf-16be')
+        else:
+            bytes += b'\xff' * 48
+        bytes += self.lighting if getattr(self, 'lighting', None) else b''
+        while len(bytes) < length - 2:
+            bytes += b'\xff'
+        bytes += _int2bytes(_crc16(bytes), 2)
+        return bytes
+
+    def dump(self):
+        print(f'     Onboard Profile: {self.name}')
+        print(f'       Report Rate {self.report_rate} ms')
+        print(f'       DPI Resolutions {self.resolutions}')
+        print(f'       Default Resolution Index {self.res_index}, Shift Resolution Index {self.res_shift_index}')
+        print(f'       Colors {self.red} {self.green} {self.blue}')
+        print(f'       Power {self.power_mode}, Angle Snapping {self.angle_snap}')
+        for i in range(0, len(self.buttons)):
+            if self.buttons[i].behavior is not None:
+                print('       BUTTON', i + 1, self.buttons[i])
+        for i in range(0, len(self.gbuttons)):
+            if self.gbuttons[i].behavior is not None:
+                print('       G-BUTTON', i + 1, self.gbuttons[i])
+
+
+_yaml.SafeLoader.add_constructor('!OnboardProfile', OnboardProfile.from_yaml)
+_yaml.add_representer(OnboardProfile, OnboardProfile.to_yaml)
+
+
+# Doesn't handle macros or lighting
+class OnboardProfiles:
+    """The entire onboard profiles information"""
+
+    def __init__(self, **kwargs):
+        for key, val in kwargs.items():
+            setattr(self, key, val)
+
+    @classmethod
+    def from_yaml(cls, loader, node):
+        args = loader.construct_mapping(node)
+        return cls(**args)
+
+    @classmethod
+    def to_yaml(cls, dumper, data):
+        return dumper.represent_mapping('!OnboardProfiles', data.__dict__)
+
+    @classmethod
+    def get_profile_headers(cls, device):
+        i = 0
+        headers = []
+        chunk = device.feature_request(FEATURE.ONBOARD_PROFILES, 0x50, 0, 0, 0, i)
+        while chunk[0:2] != b'\xff\xff':
+            sector, enabled = _unpack('!HB', chunk[0:3])
+            headers.append((sector, enabled))
+            i += 1
+            chunk = device.feature_request(FEATURE.ONBOARD_PROFILES, 0x50, 0, 0, 0, i * 4)
+        return headers
+
+    @classmethod
+    def from_device(cls, device):
+        response = device.feature_request(FEATURE.ONBOARD_PROFILES, 0x00)
+        memory, profile, macro = _unpack('!BBB', response[0:3])
+        if memory != 0x01 or profile > 0x03 or macro != 0x01:
+            return
+        count, oob, buttons, sectors, size, shift = _unpack('!BBBBHB', response[3:10])
+        gbuttons = buttons if (shift & 0x3 == 0x2) else 0
+        i = 0
+        profiles = {}
+        chunk = device.feature_request(FEATURE.ONBOARD_PROFILES, 0x50, 0, 0, 0, i)
+        while chunk[0:2] != b'\xff\xff':
+            sector, enabled = _unpack('!HB', chunk[0:3])
+            profiles[i + 1] = OnboardProfile.from_dev(device, i, sector, size, enabled, buttons, gbuttons)
+            i += 1
+            chunk = device.feature_request(FEATURE.ONBOARD_PROFILES, 0x50, 0, 0, 0, i * 4)
+        return cls(count=count, buttons=buttons, gbuttons=gbuttons, sectors=sectors, size=size, profiles=profiles)
+
+    def to_bytes(self):
+        bytes = b''
+        for i in range(1, len(self.profiles) + 1):
+            bytes += _int2bytes(self.profiles[i].sector, 2) + _int2bytes(self.profiles[i].enabled, 1) + b'\x00'
+        bytes += b'\xff\xff\x00\x00'  # marker after last profile
+        while len(bytes) < self.size - 2:  # leave room for CRC
+            bytes += b'\xff'
+        bytes += _int2bytes(_crc16(bytes), 2)
+        return bytes
+
+    @classmethod
+    def read_sector(cls, dev, sector, s):  # doesn't check for valid sector or length
+        bytes = b''
+        o = 0
+        while o < s - 15:
+            chunk = dev.feature_request(FEATURE.ONBOARD_PROFILES, 0x50, sector >> 8, sector & 0xFF, o >> 8, o & 0xFF)
+            bytes += chunk
+            o += 16
+        chunk = dev.feature_request(FEATURE.ONBOARD_PROFILES, 0x50, sector >> 8, sector & 0xFF, (s - 16) >> 8, (s - 16) & 0xFF)
+        bytes += chunk[16 + o - s:]  # the last chunk has to be read in an awkward way
+        return bytes
+
+    @classmethod
+    def write_sector(cls, device, s, bs):  # doesn't check for valid sector or length
+        rbs = OnboardProfiles.read_sector(device, s, len(bs))
+        if rbs[:-2] == bs[:-2]:
+            return False
+        device.feature_request(FEATURE.ONBOARD_PROFILES, 0x60, s >> 8, s & 0xFF, 0, 0, len(bs) >> 8, len(bs) & 0xFF)
+        o = 0
+        while o < len(bs) - 1:
+            device.feature_request(FEATURE.ONBOARD_PROFILES, 0x70, bs[o:o + 16])
+            o += 16
+        device.feature_request(FEATURE.ONBOARD_PROFILES, 0x80)
+        return True
+
+    def write(self, device):  # doesn't check for valid sectors or length
+        try:
+            written = 1 if OnboardProfiles.write_sector(device, 0, self.to_bytes()) else 0
+        except Exception as e:
+            _log.warn('Exception writing onboard profile control sector')
+            raise e
+        for p in self.profiles.values():
+            try:
+                written += 1 if OnboardProfiles.write_sector(device, p.sector, p.to_bytes(self.size)) else 0
+            except Exception as e:
+                _log.warn(f'Exception writing onboard profile sector {p.sector}')
+                raise e
+        return written
+
+    def show(self):
+        print(_yaml.dump(self))
+
+
+_yaml.SafeLoader.add_constructor('!OnboardProfiles', OnboardProfiles.from_yaml)
+_yaml.add_representer(OnboardProfiles, OnboardProfiles.to_yaml)
+
 #
 #
 #
@@ -1433,6 +1716,13 @@ def get_backlight(device):
         return Backlight(device)
 
 
+def get_profiles(device):
+    if getattr(device, '_profiles', None) is not None:
+        return device._profiles
+    if FEATURE.ONBOARD_PROFILES in device.features:
+        return OnboardProfiles.from_device(device)
+
+
 def get_mouse_pointer_info(device):
     pointer_info = feature_request(device, FEATURE.MOUSE_POINTER)
     if pointer_info:
diff --git a/lib/solaar/cli/__init__.py b/lib/solaar/cli/__init__.py
index ace57f90..782067e9 100644
--- a/lib/solaar/cli/__init__.py
+++ b/lib/solaar/cli/__init__.py
@@ -56,6 +56,15 @@ def _create_parser():
     )
     sp.set_defaults(action='probe')
 
+    sp = subparsers.add_parser('profiles', help='read or write onboard profiles', epilog='Only works on active devices.')
+    sp.add_argument(
+        'device',
+        help='device to read or write profiles of; may be a device number (1..6), a serial number, '
+        'a substring of a device\'s name'
+    )
+    sp.add_argument('profiles', nargs='?', help='file containing YAML dump of profiles')
+    sp.set_defaults(action='profiles')
+
     sp = subparsers.add_parser(
         'config',
         help='read/write device-specific settings',
@@ -198,7 +207,7 @@ def run(cli_args=None, hidraw_path=None):
     assert action in actions
 
     try:
-        if action == 'show' or action == 'probe' or action == 'config':
+        if action == 'show' or action == 'probe' or action == 'config' or action == 'profiles':
             c = list(_receivers_and_devices(hidraw_path))
         else:
             c = list(_receivers(hidraw_path))
diff --git a/lib/solaar/cli/profiles.py b/lib/solaar/cli/profiles.py
new file mode 100644
index 00000000..b4da2f81
--- /dev/null
+++ b/lib/solaar/cli/profiles.py
@@ -0,0 +1,57 @@
+# -*- python-mode -*-
+
+## Copyright (C) 2012-2013  Daniel Pavel
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License along
+## with this program; if not, write to the Free Software Foundation, Inc.,
+## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import yaml as _yaml
+
+from logitech_receiver.hidpp20 import OnboardProfiles as _OnboardProfiles
+
+
+def run(receivers, args, find_receiver, find_device):
+    assert receivers
+    assert args.device
+
+    device_name = args.device.lower()
+    profiles_file = args.profiles
+
+    dev = None
+    for dev in find_device(receivers, device_name):
+        if dev.ping():
+            break
+        dev = None
+
+    if not dev:
+        raise Exception("no online device found matching '%s'" % device_name)
+
+    if not (dev.online and dev.profiles):
+        print(f'Device {dev.name} is either offline or has no onboard profiles')
+    elif not profiles_file:
+        print(f'Dumping profiles from {dev.name}')
+        print(_yaml.dump(dev.profiles))
+    else:
+        try:
+            with open(profiles_file, 'r') as f:
+                print(f'Reading profiles from {profiles_file}')
+                profiles = _yaml.safe_load(f)
+                if not isinstance(profiles, _OnboardProfiles):
+                    print('Profiles file does not contain onboard profiles')
+                else:
+                    print(f'Loading profiles into {dev.name}')
+                    written = profiles.write(dev)
+                    print(f'Wrote {written} sectors to {dev.name}')
+        except Exception as exc:
+            print('Profiles not written:', exc)