diff --git a/homeassistant/components/alarm_control_panel/__init__.py b/homeassistant/components/alarm_control_panel/__init__.py
index 36a68eda174..47f92bfe641 100644
--- a/homeassistant/components/alarm_control_panel/__init__.py
+++ b/homeassistant/components/alarm_control_panel/__init__.py
@@ -19,6 +19,7 @@ SCAN_INTERVAL = timedelta(seconds=30)
 ATTR_CHANGED_BY = 'changed_by'
 FORMAT_TEXT = 'text'
 FORMAT_NUMBER = 'number'
+ATTR_CODE_ARM_REQUIRED = 'code_arm_required'
 
 ENTITY_ID_FORMAT = DOMAIN + '.{}'
 
@@ -87,6 +88,11 @@ class AlarmControlPanel(Entity):
         """Last change triggered by."""
         return None
 
+    @property
+    def code_arm_required(self):
+        """Whether the code is required for arm actions."""
+        return True
+
     def alarm_disarm(self, code=None):
         """Send disarm command."""
         raise NotImplementedError()
@@ -159,6 +165,7 @@ class AlarmControlPanel(Entity):
         """Return the state attributes."""
         state_attr = {
             ATTR_CODE_FORMAT: self.code_format,
-            ATTR_CHANGED_BY: self.changed_by
+            ATTR_CHANGED_BY: self.changed_by,
+            ATTR_CODE_ARM_REQUIRED: self.code_arm_required
         }
         return state_attr
diff --git a/homeassistant/components/manual_mqtt/alarm_control_panel.py b/homeassistant/components/manual_mqtt/alarm_control_panel.py
index d952dd68ebb..c051ce47173 100644
--- a/homeassistant/components/manual_mqtt/alarm_control_panel.py
+++ b/homeassistant/components/manual_mqtt/alarm_control_panel.py
@@ -24,6 +24,7 @@ from homeassistant.helpers.event import track_point_in_time
 _LOGGER = logging.getLogger(__name__)
 
 CONF_CODE_TEMPLATE = 'code_template'
+CONF_CODE_ARM_REQUIRED = 'code_arm_required'
 
 CONF_PAYLOAD_DISARM = 'payload_disarm'
 CONF_PAYLOAD_ARM_HOME = 'payload_arm_home'
@@ -108,6 +109,7 @@ PLATFORM_SCHEMA = vol.Schema(vol.All(mqtt.MQTT_BASE_PLATFORM_SCHEMA.extend({
         _state_schema(STATE_ALARM_TRIGGERED),
     vol.Required(mqtt.CONF_COMMAND_TOPIC): mqtt.valid_publish_topic,
     vol.Required(mqtt.CONF_STATE_TOPIC): mqtt.valid_subscribe_topic,
+    vol.Optional(CONF_CODE_ARM_REQUIRED, default=True): cv.boolean,
     vol.Optional(CONF_PAYLOAD_ARM_AWAY, default=DEFAULT_ARM_AWAY): cv.string,
     vol.Optional(CONF_PAYLOAD_ARM_HOME, default=DEFAULT_ARM_HOME): cv.string,
     vol.Optional(CONF_PAYLOAD_ARM_NIGHT, default=DEFAULT_ARM_NIGHT): cv.string,
@@ -126,6 +128,7 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
         config.get(mqtt.CONF_STATE_TOPIC),
         config.get(mqtt.CONF_COMMAND_TOPIC),
         config.get(mqtt.CONF_QOS),
+        config.get(CONF_CODE_ARM_REQUIRED),
         config.get(CONF_PAYLOAD_DISARM),
         config.get(CONF_PAYLOAD_ARM_HOME),
         config.get(CONF_PAYLOAD_ARM_AWAY),
@@ -146,9 +149,9 @@ class ManualMQTTAlarm(alarm.AlarmControlPanel):
     """
 
     def __init__(self, hass, name, code, code_template, disarm_after_trigger,
-                 state_topic, command_topic, qos, payload_disarm,
-                 payload_arm_home, payload_arm_away, payload_arm_night,
-                 config):
+                 state_topic, command_topic, qos, code_arm_required,
+                 payload_disarm, payload_arm_home, payload_arm_away,
+                 payload_arm_night, config):
         """Init the manual MQTT alarm panel."""
         self._state = STATE_ALARM_DISARMED
         self._hass = hass
@@ -175,6 +178,7 @@ class ManualMQTTAlarm(alarm.AlarmControlPanel):
         self._state_topic = state_topic
         self._command_topic = command_topic
         self._qos = qos
+        self._code_arm_required = code_arm_required
         self._payload_disarm = payload_disarm
         self._payload_arm_home = payload_arm_home
         self._payload_arm_away = payload_arm_away
@@ -237,6 +241,11 @@ class ManualMQTTAlarm(alarm.AlarmControlPanel):
             return alarm.FORMAT_NUMBER
         return alarm.FORMAT_TEXT
 
+    @property
+    def code_arm_required(self):
+        """Whether the code is required for arm actions."""
+        return self._code_arm_required
+
     def alarm_disarm(self, code=None):
         """Send disarm command."""
         if not self._validate_code(code, STATE_ALARM_DISARMED):
@@ -248,21 +257,24 @@ class ManualMQTTAlarm(alarm.AlarmControlPanel):
 
     def alarm_arm_home(self, code=None):
         """Send arm home command."""
-        if not self._validate_code(code, STATE_ALARM_ARMED_HOME):
+        if self._code_arm_required and not \
+                self._validate_code(code, STATE_ALARM_ARMED_HOME):
             return
 
         self._update_state(STATE_ALARM_ARMED_HOME)
 
     def alarm_arm_away(self, code=None):
         """Send arm away command."""
-        if not self._validate_code(code, STATE_ALARM_ARMED_AWAY):
+        if self._code_arm_required and not \
+                self._validate_code(code, STATE_ALARM_ARMED_AWAY):
             return
 
         self._update_state(STATE_ALARM_ARMED_AWAY)
 
     def alarm_arm_night(self, code=None):
         """Send arm night command."""
-        if not self._validate_code(code, STATE_ALARM_ARMED_NIGHT):
+        if self._code_arm_required and not \
+                self._validate_code(code, STATE_ALARM_ARMED_NIGHT):
             return
 
         self._update_state(STATE_ALARM_ARMED_NIGHT)
diff --git a/homeassistant/components/mqtt/alarm_control_panel.py b/homeassistant/components/mqtt/alarm_control_panel.py
index da3e2faf224..9827c7c4df9 100644
--- a/homeassistant/components/mqtt/alarm_control_panel.py
+++ b/homeassistant/components/mqtt/alarm_control_panel.py
@@ -192,6 +192,12 @@ class MqttAlarm(MqttAttributes, MqttAvailability, MqttDiscoveryUpdate,
             return alarm.FORMAT_NUMBER
         return alarm.FORMAT_TEXT
 
+    @property
+    def code_arm_required(self):
+        """Whether the code is required for arm actions."""
+        code_required = self._config.get(CONF_CODE_ARM_REQUIRED)
+        return code_required
+
     async def async_alarm_disarm(self, code=None):
         """Send disarm command.
 
diff --git a/tests/components/manual_mqtt/test_alarm_control_panel.py b/tests/components/manual_mqtt/test_alarm_control_panel.py
index f5558331bce..a2004140141 100644
--- a/tests/components/manual_mqtt/test_alarm_control_panel.py
+++ b/tests/components/manual_mqtt/test_alarm_control_panel.py
@@ -77,6 +77,32 @@ class TestAlarmControlPanelManualMqtt(unittest.TestCase):
         assert STATE_ALARM_ARMED_HOME == \
             self.hass.states.get(entity_id).state
 
+    def test_arm_home_no_pending_when_code_not_req(self):
+        """Test arm home method."""
+        assert setup_component(
+            self.hass, alarm_control_panel.DOMAIN,
+            {'alarm_control_panel': {
+                'platform': 'manual_mqtt',
+                'name': 'test',
+                'code': CODE,
+                'code_arm_required': False,
+                'pending_time': 0,
+                'disarm_after_trigger': False,
+                'command_topic': 'alarm/command',
+                'state_topic': 'alarm/state',
+            }})
+
+        entity_id = 'alarm_control_panel.test'
+
+        assert STATE_ALARM_DISARMED == \
+            self.hass.states.get(entity_id).state
+
+        common.alarm_arm_home(self.hass, 0)
+        self.hass.block_till_done()
+
+        assert STATE_ALARM_ARMED_HOME == \
+            self.hass.states.get(entity_id).state
+
     def test_arm_home_with_pending(self):
         """Test arm home method."""
         assert setup_component(
@@ -164,6 +190,32 @@ class TestAlarmControlPanelManualMqtt(unittest.TestCase):
         assert STATE_ALARM_ARMED_AWAY == \
             self.hass.states.get(entity_id).state
 
+    def test_arm_away_no_pending_when_code_not_req(self):
+        """Test arm home method."""
+        assert setup_component(
+            self.hass, alarm_control_panel.DOMAIN,
+            {'alarm_control_panel': {
+                'platform': 'manual_mqtt',
+                'name': 'test',
+                'code_arm_required': False,
+                'code': CODE,
+                'pending_time': 0,
+                'disarm_after_trigger': False,
+                'command_topic': 'alarm/command',
+                'state_topic': 'alarm/state',
+            }})
+
+        entity_id = 'alarm_control_panel.test'
+
+        assert STATE_ALARM_DISARMED == \
+            self.hass.states.get(entity_id).state
+
+        common.alarm_arm_away(self.hass, 0, entity_id)
+        self.hass.block_till_done()
+
+        assert STATE_ALARM_ARMED_AWAY == \
+            self.hass.states.get(entity_id).state
+
     def test_arm_home_with_template_code(self):
         """Attempt to arm with a template-based code."""
         assert setup_component(
@@ -279,6 +331,32 @@ class TestAlarmControlPanelManualMqtt(unittest.TestCase):
         assert STATE_ALARM_ARMED_NIGHT == \
             self.hass.states.get(entity_id).state
 
+    def test_arm_night_no_pending_when_code_not_req(self):
+        """Test arm night method."""
+        assert setup_component(
+            self.hass, alarm_control_panel.DOMAIN,
+            {'alarm_control_panel': {
+                'platform': 'manual_mqtt',
+                'name': 'test',
+                'code_arm_required': False,
+                'code': CODE,
+                'pending_time': 0,
+                'disarm_after_trigger': False,
+                'command_topic': 'alarm/command',
+                'state_topic': 'alarm/state',
+            }})
+
+        entity_id = 'alarm_control_panel.test'
+
+        assert STATE_ALARM_DISARMED == \
+            self.hass.states.get(entity_id).state
+
+        common.alarm_arm_night(self.hass, 0, entity_id)
+        self.hass.block_till_done()
+
+        assert STATE_ALARM_ARMED_NIGHT == \
+            self.hass.states.get(entity_id).state
+
     def test_arm_night_with_pending(self):
         """Test arm night method."""
         assert setup_component(