diff --git a/agent_based/cisco_asa_sensors.py b/agent_based/cisco_asa_sensors.py
new file mode 100644
index 0000000000000000000000000000000000000000..240f9e3d8bcc88af62c9cabfcff2082ccc5cdf7a
--- /dev/null
+++ b/agent_based/cisco_asa_sensors.py
@@ -0,0 +1,256 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# License: GNU General Public License v2
+#
+# Author: thl-cmk[at]outlook[dot]com
+# URL   : https://thl-cmk.hopto.org
+# Date  : 2021-03-18
+#
+# Monitor Cisco ASA temperature sensors
+#
+# this check is based on the cmk 2.0 checkpoint_temp check
+#
+# 2021-02-25: rewrite for CMK 2.x
+#
+# sample snmpwalk
+#
+# sample section
+# 
+#
+
+from typing import Mapping, Dict, List, Tuple, NamedTuple
+
+from .agent_based_api.v1.type_defs import (
+    DiscoveryResult,
+    CheckResult,
+    StringTable,
+)
+
+from .agent_based_api.v1 import (
+    register,
+    Service,
+    equals,
+    Result,
+    check_levels,
+    State,
+    SNMPTree,
+    startswith,
+    all_of,
+    any_of,
+)
+
+
+# ##################################################################################################
+#
+# ASA TEMPERATURE BASE
+#
+# ##################################################################################################
+
+
+class CiscoAsaSensor(NamedTuple):
+    value: float
+    status: int
+    state_readable: str
+    unit: str
+
+
+def parse_cisco_asa_sensors(string_table: List[StringTable]) -> Dict:
+    def get_state_readable(st: str) -> str:
+        states = {
+            '1': 'Ok',
+            '2': 'unavailable',
+            '3': 'nonoperational',
+        }
+        return states.get(st, st)
+
+    def get_sensor_status(st: str) -> State:
+        states = {
+            '1': State.OK,
+            '2': State.WARN,
+            '3': State.CRIT
+        }
+        return states.get(st, State.CRIT)
+
+    sensors = {
+        'fan': {},
+        'temp': {},
+        'power': {},
+    }
+
+    for sensorname, sensortype, sensorvalue, sensorstatus, sensorunits in string_table[0]:
+        if sensorstatus.isdigit():
+            state_readable = get_state_readable(sensorstatus)
+            sensorstatus = get_sensor_status(sensorstatus)
+
+        if sensortype == '8':  # Temperature
+            sensorname = sensorname.replace('Temperature ', '')
+
+            sensors['temp'].update({sensorname: CiscoAsaSensor(
+                value=to_celsius(float(sensorvalue), sensorunits),
+                unit=sensorunits,
+                status=sensorstatus,
+                state_readable=state_readable,
+            )})
+
+        if sensortype == '10':  # Fan
+            sensorname = sensorname.replace('Fan ', '')
+
+            sensors['fan'].update({sensorname: CiscoAsaSensor(
+                value=int(sensorvalue),
+                unit=sensorunits,
+                status=sensorstatus,
+                state_readable=state_readable,
+            )})
+
+        if sensortype == '12':  # Power supply
+            sensorname = sensorname.replace('Power ', '')
+
+            sensors['power'].update({sensorname: CiscoAsaSensor(
+                status=sensorstatus,
+                state_readable=state_readable,
+            )})
+
+    return sensors
+
+
+register.snmp_section(
+    name='cisco_asa_sensors',
+    parse_function=parse_cisco_asa_sensors,
+    fetch=[
+        SNMPTree(
+            base='.1.3.6.1.2.1',  #
+            oids=[
+                '47.1.1.1.1.7',  # ENTITY-MIB::entPhysicalName
+                '99.1.1.1.1',  # ENTITY-SENSOR-MIB::entPhySensorType
+                '99.1.1.1.4',  # ENTITY-SENSOR-MIB::entPhySensorValue
+                '99.1.1.1.5',  # ENTITY-SENSOR-MIB::entPhySensorOperStatus
+                '99.1.1.1.6',  # ENTITY-SENSOR-MIB::entPhySensorUnitsDisplay
+            ]
+        ),
+    ],
+    detect=startswith('.1.3.6.1.2.1.1.1.0', 'cisco adaptive security appliance')
+)
+
+# ##################################################################################################
+#
+# ASA SENSORS TEMPERATURE
+#
+# ##################################################################################################
+
+from .utils.temperature import (
+    check_temperature,
+    TempParamType,
+    to_celsius,
+)
+
+
+def discovery_cisco_asa_temp(section: Dict) -> DiscoveryResult:
+    for key in section['temp']:
+        yield Service(item=key)  # , parameters={'asgNetIfSpeed': section[item].asgNetIfSpeed})
+
+
+def check_cisco_asa_temp(item, params: TempParamType, section) -> CheckResult:
+    try:
+        sensor = section['temp'][item]
+
+        yield Result(state=sensor.status, summary='Status: %s' % sensor.state_readable)
+
+        yield from check_temperature(
+            sensor.value,
+            dev_unit=sensor.unit,
+            dev_status=sensor.status,
+            dev_status_name=sensor.state_readable,
+            params=params,
+            unique_name='check_cisco_asa_temp.%s' % item,
+        )
+    except KeyError:
+        pass
+
+
+register.check_plugin(
+    name='cisco_asa_temp',
+    service_name='Temperature %s',
+    sections=['cisco_asa_sensors'],
+    discovery_function=discovery_cisco_asa_temp,
+    check_function=check_cisco_asa_temp,
+    check_default_parameters={},
+    check_ruleset_name='temperature'
+)
+
+
+# ##################################################################################################
+#
+# ASA SENSORS FAN
+#
+# ##################################################################################################
+
+def render_rpm(value) -> str:
+    return '%s RPM' % str(value)
+
+
+def discovery_cisco_asa_fan(section: Dict) -> DiscoveryResult:
+    for key in section['fan']:
+        yield Service(item=key)  # , parameters={'asgNetIfSpeed': section[item].asgNetIfSpeed})
+
+
+def check_cisco_asa_fan(item, params: TempParamType, section) -> CheckResult:
+    try:
+        sensor = section['fan'][item]
+
+        yield Result(state=sensor.status, summary='Status: %s' % sensor.state_readable)
+
+        yield from check_levels(
+            sensor.value,
+            label='Fan speed',
+            levels_lower=params.get('levels_lower', None),
+            levels_upper=params.get('levels_upper', None),
+            metric_name='fan_speed',
+            render_func=lambda v: render_rpm(v),
+        )
+
+    except KeyError:
+        pass
+
+
+register.check_plugin(
+    name='cisco_asa_fan',
+    service_name='Fan %s',
+    sections=['cisco_asa_sensors'],
+    discovery_function=discovery_cisco_asa_fan,
+    check_function=check_cisco_asa_fan,
+    check_default_parameters={},
+    check_ruleset_name='fan_speed'
+)
+
+
+# ##################################################################################################
+#
+# ASA SENSORS POWER SUPPLY
+#
+# ##################################################################################################
+
+def discovery_cisco_asa_power(section: Dict) -> DiscoveryResult:
+    for key in section['power']:
+        yield Service(item=key)  # , parameters={'asgNetIfSpeed': section[item].asgNetIfSpeed})
+
+
+def check_cisco_asa_power(item, params: TempParamType, section) -> CheckResult:
+    try:
+        sensor = section['power'][item]
+
+        yield Result(state=sensor.status, summary='Status: %s' % sensor.state_readable)
+
+    except KeyError:
+        pass
+
+
+register.check_plugin(
+    name='cisco_asa_power',
+    service_name='Power %s',
+    sections=['cisco_asa_sensors'],
+    discovery_function=discovery_cisco_asa_power,
+    check_function=check_cisco_asa_power,
+    check_default_parameters={},
+    # check_ruleset_name='power_supply'
+)
\ No newline at end of file
diff --git a/cisco_asa_sensors.mkp b/cisco_asa_sensors.mkp
new file mode 100644
index 0000000000000000000000000000000000000000..d8eafac38fe111963df4503988fe0344c3373ea1
Binary files /dev/null and b/cisco_asa_sensors.mkp differ
diff --git a/packages/cisco_asa_sensors b/packages/cisco_asa_sensors
new file mode 100644
index 0000000000000000000000000000000000000000..2a3a13a04363e32c200cb7c8a3b2fdc4221ec4d8
--- /dev/null
+++ b/packages/cisco_asa_sensors
@@ -0,0 +1,14 @@
+{'author': 'thl-cmk[at]outlook[dot]com',
+ 'description': 'This plugin contains checks for Cisco ASA fan, temperature '
+                'and power supply\n',
+ 'download_url': 'https://thl-cmk.hopto.org',
+ 'files': {'agent_based': ['cisco_asa_sensors.py'],
+           'web': ['plugins/metrics/fan_speed.py',
+                   'plugins/wato/fan_speed.py']},
+ 'name': 'cisco_asa_sensors',
+ 'num_files': 3,
+ 'title': 'Cisco ASA Sensors',
+ 'version': '20210318_v0.0.1',
+ 'version.min_required': '2.0.0',
+ 'version.packaged': '2.0.0',
+ 'version.usable_until': None}
\ No newline at end of file
diff --git a/web/plugins/metrics/fan_speed.py b/web/plugins/metrics/fan_speed.py
new file mode 100644
index 0000000000000000000000000000000000000000..3180bcddf8e9b9d6c46ebcde22937b62ae098f71
--- /dev/null
+++ b/web/plugins/metrics/fan_speed.py
@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+
+from cmk.gui.i18n import _
+
+from cmk.gui.plugins.metrics import (
+    metric_info,
+    graph_info,
+    perfometer_info
+)
+
+metric_info["fan_speed"] = {
+    "title": _("Fan speed"),
+    "unit": "rpm",
+    "color": "16/a",
+}
+
+graph_info['fan_speed'] = {
+    'title': _('Fan speed'),
+    'metrics': [
+        ('fan_speed', 'area'),
+    ],
+    'scalars': [
+        ('fan_speed:crit', _('crit level')),
+        ('fan_speed:warn', _('warn level')),
+    ],
+
+}
+
+perfometer_info.append({
+    'type': 'logarithmic',
+    'metric': 'fan_speed',
+    'half_value': 7500.0,
+    'exponent': 2,
+})
\ No newline at end of file
diff --git a/web/plugins/wato/fan_speed.py b/web/plugins/wato/fan_speed.py
new file mode 100644
index 0000000000000000000000000000000000000000..b3ff0821b7624d0eb3f3d2853dd01b9d7b303ed4
--- /dev/null
+++ b/web/plugins/wato/fan_speed.py
@@ -0,0 +1,153 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# Copyright (C) 2019 tribe29 GmbH - License: GNU General Public License v2
+# This file is part of Checkmk (https://checkmk.com). It is subject to the terms and
+# conditions defined in the file COPYING, which is part of this source code package.
+
+from cmk.gui.i18n import _
+from cmk.gui.valuespec import (
+    Dictionary,
+    DropdownChoice,
+    Float,
+    Integer,
+    TextAscii,
+    Transform,
+    Tuple,
+)
+from cmk.gui.plugins.wato import (
+    RulespecGroupCheckParametersEnvironment,
+    CheckParameterRulespecWithItem,
+    rulespec_registry,
+)
+
+
+# New fan speed rule for modern fan checks that have the
+# sensor type (e.g. 'CPU', 'Chassis', etc.) as the beginning of their
+# item (e.g. 'CPU 1', 'Chassis 17/11'). This will replace all other
+# fan speed rulesets in future. Note: those few fan speed checks
+# that do *not* use an item, need to be converted to use one single
+# item (other than None).
+def _parameter_valuespec_temperature():
+    return Transform(
+        Dictionary(elements=[
+            (
+                'levels',
+                Transform(
+                    Tuple(
+                        title=_('Upper fan speed Levels'),
+                        elements=[
+                            Float(title=_('Warning at'), unit=u'RPM'),
+                            Float(title=_('Critical at'), unit=u'RPM'),
+                        ],
+                    ),
+                    forth=lambda elems: (float(elems[0]), float(elems[1])),
+                ),
+            ),
+            (
+                'levels_lower',
+                Transform(
+                    Tuple(
+                        title=_('Lower fan speed Levels'),
+                        elements=[
+                            Float(title=_('Warning below'), unit=u'RPM'),
+                            Float(title=_('Critical below'), unit=u'RPM'),
+                        ],
+                    ),
+                    forth=lambda elems: (float(elems[0]), float(elems[1])),
+                ),
+            ),
+
+            # ('device_levels_handling',
+            #  DropdownChoice(
+            #      title=_('Interpretation of the device's own temperature status'),
+            #      choices=[
+            #          ('usr', _('Ignore device's own levels')),
+            #          ('dev', _('Only use device's levels, ignore yours')),
+            #          ('best', _('Use least critical of your and device's levels')),
+            #          ('worst', _('Use most critical of your and device's levels')),
+            #          ('devdefault', _('Use device's levels if present, otherwise yours')),
+            #          ('usrdefault', _('Use your own levels if present, otherwise the device's')),
+            #      ],
+            #      default_value='usrdefault',
+            #  )),
+            # (
+            #     'trend_compute',
+            #     Dictionary(
+            #         title=_('Trend computation'),
+            #         elements=[
+            #             ('period',
+            #              Integer(
+            #                  title=_('Observation period for fan speed trend computation'),
+            #                  default_value=30,
+            #                  minvalue=5,
+            #                  unit=_('minutes'),
+            #              )),
+            #             ('trend_levels',
+            #              Tuple(
+            #                  title=_('Levels on fan speed increase per period'),
+            #                  elements=[
+            #                      Integer(
+            #                          title=_('Warning at'),
+            #                          unit=u'RPM / ' + _('period'),
+            #                          default_value=5,
+            #                      ),
+            #                      Integer(
+            #                          title=_('Critical at'),
+            #                          unit=u'RPM / ' + _('period'),
+            #                          default_value=10,
+            #                      )
+            #                  ],
+            #              )),
+            #             ('trend_levels_lower',
+            #              Tuple(
+            #                  title=_('Levels on fan speed decrease per period'),
+            #                  elements=[
+            #                      Integer(
+            #                          title=_('Warning at'),
+            #                          unit=u'RPM / ' + _('period'),
+            #                          default_value=5,
+            #                      ),
+            #                      Integer(
+            #                          title=_('Critical at'),
+            #                          unit=u'RPM / ' + _('period'),
+            #                          default_value=10,
+            #                      )
+            #                  ],
+            #              )),
+            #             ('trend_timeleft',
+            #              Tuple(
+            #                  title=
+            #                  _('Levels on the time left until a critical fann speed (upper or lower) is reached'
+            #                   ),
+            #                  elements=[
+            #                      Integer(
+            #                          title=_('Warning if below'),
+            #                          unit=_('minutes'),
+            #                          default_value=240,
+            #                      ),
+            #                      Integer(
+            #                          title=_('Critical if below'),
+            #                          unit=_('minutes'),
+            #                          default_value=120,
+            #                      ),
+            #                  ],
+            #              ))
+            #         ],
+            #         optional_keys=['trend_levels', 'trend_levels_lower', 'trend_timeleft'],
+            #     ),
+            # ),
+        ],),
+        forth=lambda v: isinstance(v, tuple) and {'levels': v} or v,
+    )
+
+
+rulespec_registry.register(
+    CheckParameterRulespecWithItem(
+        check_group_name='fan_speed',
+        group=RulespecGroupCheckParametersEnvironment,
+        item_spec=lambda: TextAscii(title=_('Sensor ID'),
+                                    help=_('The identifier of the fan speed sensor.')),
+        match_type='dict',
+        parameter_valuespec=_parameter_valuespec_temperature,
+        title=lambda: _('Fan speed'),
+    ))
\ No newline at end of file