diff --git a/devices/__init__.py b/devices/__init__.py
index 61fcc40..30802ee 100644
--- a/devices/__init__.py
+++ b/devices/__init__.py
@@ -7,7 +7,7 @@ from devices.tradfri import sw as tradfri_sw
 from devices.tradfri import sw_br as tradfri_sw_br
 from devices.tradfri import sw_br_ct as tradfri_sw_br_ct
 
-tradfri_button = None   # TODO: required, when a interface for external device stimulation is available
+tradfri_button = None
 silvercrest_motion_sensor = None
 audio_status = None
 remote = None
@@ -17,7 +17,26 @@ class group(object):
     def __init__(self, *args):
         self.device_group = args
         self.topic = self.device_group[0].topic
+        #
+        self.user_cmds = {}
+        for key in self.device_group[0].user_cmds:
+            self.user_cmds[key] = getattr(self, self.device_group[0].user_cmds[key].__name__)
 
     def power_on_action(self, *args, **kwargs):
         for gm in self.device_group:
             gm.power_on_action(*args, **kwargs)
+
+    def __getattribute__(self, name):
+        def group_execution(*args, **kwargs):
+            for member in self.device_group[:]:
+                m = getattr(member, name)
+                m(*args, **kwargs)
+        try:
+            rv = super().__getattribute__(name)
+        except AttributeError:
+            if callable(getattr(self.device_group[0], name)):
+                return group_execution
+            else:
+                return getattr(self.device_group[0], name)
+        else:
+            return rv
diff --git a/devices/brennenstuhl.py b/devices/brennenstuhl.py
index 7ff488b..7af4007 100644
--- a/devices/brennenstuhl.py
+++ b/devices/brennenstuhl.py
@@ -46,13 +46,14 @@ import time
 }
 """
 
-class vlv(base):
-#    """A tradfri device with switching functionality
 
-#    Args:
-#        mqtt_client (mqtt.mqtt_client): A MQTT Client instance
-#        topic (str): the base topic for this device
-#    """
+class vlv(base):
+    """A tradfri device with switching functionality
+
+    Args:
+        mqtt_client (mqtt.mqtt_client): A MQTT Client instance
+        topic (str): the base topic for this device
+    """
     PROPERTIES = [
         "away_mode",
         "battery",
@@ -65,6 +66,7 @@ class vlv(base):
         "valve_detection",
         "window_detection"
     ]
+
     def __init__(self, mqtt_client, topic, **kwargs):
         super().__init__(mqtt_client, topic, **kwargs)
         self["away_mode"] = "OFF"
@@ -82,6 +84,11 @@ class vlv(base):
         #
         self.tq = task.threaded_queue()
         self.tq.run()
+        #
+        cmd_base = self.topic.replace('/', '.') + '.'
+        self.user_cmds = {
+            cmd_base + 'setpoint': self.__ui_setpoint__,
+        }
 
     def set_state(self, value):
         self.__set__("state", "on" if value else "off")
@@ -104,3 +111,12 @@ class vlv(base):
                 data[key] = self[key]
         self.logger.info("Sending status: %s", repr(data))
         self.mqtt_client.send(self.topic, json.dumps(data))
+
+    def __ui_setpoint__(self, *args):
+        try:
+            value = float(args[0].replace(',', '.'))
+        except (ValueError, IndexError):
+            print("You need to give a numeric value as first argument.")
+        else:
+            self.__set__("current_heating_setpoint", value)
+            self.tq.enqueue(1, self.send_device_status, self)
diff --git a/devices/my.py b/devices/my.py
index 578035f..23419c0 100644
--- a/devices/my.py
+++ b/devices/my.py
@@ -17,14 +17,26 @@ class powerplug(base):
         super().__init__(mqtt_client, topic)
         #
         for i in range(0, 4):
-            self[self.PROPERTIES[i]] = False
+            self[self.PROPERTIES[i]] = 'false'
             self.mqtt_client.add_callback(self.topic + '/output/%d/set' % (i + 1), self.__rx_set__)
+        #
+        cmd_base = self.topic.replace('/', '.') + '.'
+        self.user_cmds = {
+            cmd_base + 'toggle1': self.__ui_toggle_output_0__,
+            cmd_base + 'toggle2': self.__ui_toggle_output_1__,
+            cmd_base + 'toggle3': self.__ui_toggle_output_2__,
+            cmd_base + 'toggle4': self.__ui_toggle_output_3__,
+        }
 
     def __rx_set__(self, client, userdata, message):
         data = message.payload.decode('utf-8')
         key = message.topic.split('/')[-3] + '/' + message.topic.split('/')[-2]
         self.logger.info("Received set data for %s: %s", key, repr(data))
         self.__set__(key, data)
+
+    def __set__(self, key, data):
+        base.__set__(self, key, data)
+        #
         self.send_device_status(key)
         if key.startswith("output/"):
             if data == "true":
@@ -34,3 +46,19 @@ class powerplug(base):
         data = self[key]
         self.logger.info("Sending status for %s: %s", key, repr(data))
         self.mqtt_client.send(self.topic + '/' + key, data)
+
+    def __ui_toggle_output__(self, num):
+        key = self.PROPERTIES[num]
+        self.__set__(key, 'false' if self.get(key).lower() == 'true' else 'true')
+
+    def __ui_toggle_output_0__(self, *args):
+        self.__ui_toggle_output__(0)
+
+    def __ui_toggle_output_1__(self, *args):
+        self.__ui_toggle_output__(1)
+
+    def __ui_toggle_output_2__(self, *args):
+        self.__ui_toggle_output__(2)
+
+    def __ui_toggle_output_3__(self, *args):
+        self.__ui_toggle_output__(3)
diff --git a/devices/shelly.py b/devices/shelly.py
index 5210af0..2b90c77 100644
--- a/devices/shelly.py
+++ b/devices/shelly.py
@@ -43,25 +43,35 @@ class shelly_sw1(base):
         topic (str): the base topic for this device
         kwargs (**dict): cd_r0=list of devices connected to relay/0
     """
+    KEY_OUTPUT_0 = "relay/0"
+    #
     PROPERTIES = [
-        "relay/0",
+        KEY_OUTPUT_0,
     ]
 
     def __init__(self, mqtt_client, topic):
         super().__init__(mqtt_client, topic)
-        self["state"] = "off"
+        self[self.KEY_OUTPUT_0] = "off"
         #
         self.__auto_off__ = None
         #
-        self.mqtt_client.add_callback(self.topic + '/relay/0/command', self.__rx_set__)
+        self.mqtt_client.add_callback(self.topic + '/' + self.KEY_OUTPUT_0 + '/command', self.__rx_set__)
+        #
+        cmd_base = self.topic.replace('/', '.') + '.'
+        self.user_cmds = {
+            cmd_base + 'toggle': self.__ui_toggle_output_0__,
+        }
 
     def __rx_set__(self, client, userdata, message):
         data = message.payload.decode('utf-8')
         key = message.topic.split('/')[-3] + '/' + message.topic.split('/')[-2]
         self.logger.info("Received set data for %s: %s", key, repr(data))
         self.__set__(key, data)
+
+    def __set__(self, key, data):
+        base.__set__(self, key, data)
         self.send_device_status(key)
-        if key == "relay/0":
+        if key == self.KEY_OUTPUT_0:
             if data.lower() == "on":
                 self.power_on(key)
                 if self.__auto_off__ is not None:
@@ -79,6 +89,9 @@ class shelly_sw1(base):
         self.__auto_off__ = task.delayed(sec, self.__auto_off_func__)
 
     def __auto_off_func__(self):
-        if self.get(self.PROPERTIES[0]).lower() != 'off':
-            self.__set__(self.PROPERTIES[0], "off")
-            self.send_device_status(self.PROPERTIES[0])
+        if self.get(self.KEY_OUTPUT_0).lower() != 'off':
+            self.__set__(self.KEY_OUTPUT_0, "off")
+            self.send_device_status(self.KEY_OUTPUT_0)
+
+    def __ui_toggle_output_0__(self, *args):
+        self.__set__(self.KEY_OUTPUT_0, 'off' if self.get(self.KEY_OUTPUT_0).lower() == 'on' else 'on')
diff --git a/devices/tradfri.py b/devices/tradfri.py
index de23f9b..6026576 100644
--- a/devices/tradfri.py
+++ b/devices/tradfri.py
@@ -50,19 +50,25 @@ class sw(base):
         mqtt_client (mqtt.mqtt_client): A MQTT Client instance
         topic (str): the base topic for this device
     """
+    KEY_OUTPUT_0 = "state"
     PROPERTIES = [
-        "state",
+        KEY_OUTPUT_0,
     ]
 
     def __init__(self, mqtt_client, topic):
         super().__init__(mqtt_client, topic)
-        self["state"] = "off"
+        self[self.KEY_OUTPUT_0] = "off"
         #
         self.mqtt_client.add_callback(self.topic + '/set', self.__rx_set__)
         self.mqtt_client.add_callback(self.topic + '/get', self.__rx_get__)
+        #
+        cmd_base = self.topic.replace('/', '.') + '.'
+        self.user_cmds = {
+            cmd_base + 'toggle': self.__ui_toggle_output_0__,
+        }
 
     def set_state(self, value):
-        self.__set__("state", "on" if value else "off")
+        self.__set__(self.KEY_OUTPUT_0, "on" if value else "off")
         self.send_device_status()
 
     def __rx_set__(self, client, userdata, message):
@@ -71,14 +77,14 @@ class sw(base):
         for key in data:
             self.__set__(key, data[key])
         self.send_device_status()
-        if "state" in data and data.get("state", 'OFF').lower() == "on":
-            self.power_on("state")
+        if self.KEY_OUTPUT_0 in data and data.get(self.KEY_OUTPUT_0, 'OFF').lower() == "on":
+            self.power_on(self.KEY_OUTPUT_0)
 
     def __rx_get__(self, client, userdata, message):
         self.send_device_status()
 
     def power_on_action(self):
-        self["state"] = "on"
+        self[self.KEY_OUTPUT_0] = "on"
         self.send_device_status()
 
     def send_device_status(self):
@@ -86,6 +92,10 @@ class sw(base):
         self.logger.info("Sending status: %s", repr(data))
         self.mqtt_client.send(self.topic, data)
 
+    def __ui_toggle_output_0__(self, *args):
+        self.__set__(self.KEY_OUTPUT_0, 'off' if self.get(self.KEY_OUTPUT_0).lower() == 'on' else 'on')
+        self.send_device_status()
+
 
 class sw_br(sw):
     """A tradfri device with switching and brightness functionality
diff --git a/home.py b/home.py
new file mode 100644
index 0000000..9208aa9
--- /dev/null
+++ b/home.py
@@ -0,0 +1,62 @@
+import devdi.props as props
+
+
+def functions(pd):
+    #######
+    # GFW #
+    #######
+    loc = props.LOC_GFW
+    # DIRK
+    roo = props.ROO_DIR
+    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
+    tml = pd.get(props.STG_ZGW, loc, roo, props.FUN_MAL)
+    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
+
+    sml = pd.get(props.STG_MYA, loc, roo, props.FUN_MPP)
+    tml = pd.get(props.STG_ZGW, loc, roo, props.FUN_DEL)
+    sml.register_power_on_instance(tml, sml.PROPERTIES[1])
+
+    # FLOOR
+    roo = props.ROO_FLO
+    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
+    tml = pd.get(props.STG_ZGW, loc, roo, props.FUN_MAL)
+    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
+
+    #######
+    # FFW #
+    #######
+    loc = props.LOC_FFW
+    # JULIAN
+    roo = props.ROO_JUL
+    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
+    tml = pd.get(props.STG_ZFW, loc, roo, props.FUN_MAL)
+    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
+    # LIVINGROOM
+    roo = props.ROO_LIV
+    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
+    tml = pd.get(props.STG_ZFW, loc, roo, props.FUN_MAL)
+    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
+    # SLEEP
+    roo = props.ROO_SLP
+    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
+    tml = pd.get(props.STG_ZFW, loc, roo, props.FUN_MAL)
+    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
+
+    #######
+    # FFE #
+    #######
+    loc = props.LOC_FFE
+    # KITCHEN
+    roo = props.ROO_KIT
+    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_CIR)
+    sml.auto_off(600)
+    # LIVINGROOM
+    roo = props.ROO_LIV
+    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
+    tml = pd.get(props.STG_ZFE, loc, roo, props.FUN_MAL)
+    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
+    # SLEEP
+    roo = props.ROO_SLP
+    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
+    tml = pd.get(props.STG_ZFE, loc, roo, props.FUN_MAL)
+    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
diff --git a/home_emulation.py b/home_emulation.py
index 891cdb4..c58d896 100644
--- a/home_emulation.py
+++ b/home_emulation.py
@@ -1,14 +1,15 @@
 import config
 import devdi
-import devdi.props as props
+import home
 import logging
 import mqtt
 import os
 import report
-import time
+import user_interface
 
+# TODO: Add some more ui commands for devices
+# TODO: Add some test for smart_brain
 # TODO: Implementation of missing devices in devices/__init__.py
-# TODO: Implementation of interface for external device stimulation
 
 logger = logging.getLogger(config.APP_NAME)
 
@@ -37,64 +38,17 @@ if __name__ == "__main__":
     #
     # Smart Home Functionality
     #
-    #######
-    # GFW #
-    #######
-    loc = props.LOC_GFW
-    # DIRK
-    roo = props.ROO_DIR
-    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
-    tml = pd.get(props.STG_ZGW, loc, roo, props.FUN_MAL)
-    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
+    home.functions(pd)
 
-    sml = pd.get(props.STG_MYA, loc, roo, props.FUN_MPP)
-    tml = pd.get(props.STG_ZGW, loc, roo, props.FUN_DEL)
-    sml.register_power_on_instance(tml, sml.PROPERTIES[1])
-
-    # FLOOR
-    roo = props.ROO_FLO
-    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
-    tml = pd.get(props.STG_ZGW, loc, roo, props.FUN_MAL)
-    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
-
-    #######
-    # FFW #
-    #######
-    loc = props.LOC_FFW
-    # JULIAN
-    roo = props.ROO_JUL
-    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
-    tml = pd.get(props.STG_ZFW, loc, roo, props.FUN_MAL)
-    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
-    # LIVINGROOM
-    roo = props.ROO_LIV
-    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
-    tml = pd.get(props.STG_ZFW, loc, roo, props.FUN_MAL)
-    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
-    # SLEEP
-    roo = props.ROO_SLP
-    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
-    tml = pd.get(props.STG_ZFW, loc, roo, props.FUN_MAL)
-    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
-
-    #######
-    # FFE #
-    #######
-    loc = props.LOC_FFE
-    # KITCHEN
-    roo = props.ROO_KIT
-    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_CIR)
-    sml.auto_off(600)
-    # LIVINGROOM
-    roo = props.ROO_LIV
-    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
-    tml = pd.get(props.STG_ZFE, loc, roo, props.FUN_MAL)
-    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
-    # SLEEP
-    roo = props.ROO_SLP
-    sml = pd.get(props.STG_SHE, loc, roo, props.FUN_MAL)
-    tml = pd.get(props.STG_ZFE, loc, roo, props.FUN_MAL)
-    sml.register_power_on_instance(tml, sml.PROPERTIES[0])
-
-    while (True):
-        time.sleep(1)
+    #
+    # User Interface
+    #
+    ui = user_interface.user_interface()
+    # Add the device commands
+    for d in pd.values():
+        try:
+            for cmd in d.user_cmds:
+                ui.add_command(cmd, d.user_cmds[cmd])
+        except AttributeError:
+            pass    # device seems to have no user commands
+    ui.run()
diff --git a/user_interface.py b/user_interface.py
new file mode 100644
index 0000000..32b3462
--- /dev/null
+++ b/user_interface.py
@@ -0,0 +1,53 @@
+import readline
+import sys
+import time
+
+
+class user_interface(dict):
+    def __init__(self):
+        super().__init__(self)
+        self.add_command('quit', None)
+
+    def run(self):
+        readline.parse_and_bind("tab: complete")
+        readline.set_completer(self.completer)
+        print("\nEnter command: ")
+        while (True):
+            userfeedback = input('')
+            command = userfeedback.split(' ')[0]
+            if userfeedback == 'quit':
+                break
+            else:
+                self.call_it(userfeedback)
+
+    def call_it(self, userfeedback):
+        args = userfeedback.split(" ")
+        cmd = args.pop(0)
+        cb = self.get(cmd)
+        if callable(cb):
+            cb(*args)
+        else:
+            print("Unknown command \"%s\"" % name)
+
+    def add_command(self, name, callback):
+        self[name] = callback
+
+    def reduced_list(self, text):
+        """
+        Create reduced completation list
+        """
+        reduced_list = {}
+        for cmd in self.keys():
+            next_dot = cmd[len(text):].find('.')
+            if next_dot >= 0:
+                reduced_list[cmd[:len(text) + next_dot + 1]] = None
+            else:
+                reduced_list[cmd] = None
+        return reduced_list.keys()
+
+    def completer(self, text, state):
+        """
+        Our custom completer function
+        """
+        options = [x for x in self.reduced_list(text) if x.startswith(text)]
+        return options[state]