diff --git a/homeassistant/components/light/mochad.py b/homeassistant/components/light/mochad.py
index fffaa293188..3d67edaf7cb 100644
--- a/homeassistant/components/light/mochad.py
+++ b/homeassistant/components/light/mochad.py
@@ -62,7 +62,8 @@ class MochadLight(Light):
 
     def _get_device_status(self):
         """Get the status of the light from mochad."""
-        status = self.device.get_status().rstrip()
+        with mochad.REQ_LOCK:
+            status = self.device.get_status().rstrip()
         return status == 'on'
 
     @property
@@ -88,12 +89,14 @@ class MochadLight(Light):
     def turn_on(self, **kwargs):
         """Send the command to turn the light on."""
         self._brightness = kwargs.get(ATTR_BRIGHTNESS, 255)
-        self.device.send_cmd("xdim {}".format(self._brightness))
-        self._controller.read_data()
+        with mochad.REQ_LOCK:
+            self.device.send_cmd("xdim {}".format(self._brightness))
+            self._controller.read_data()
         self._state = True
 
     def turn_off(self, **kwargs):
         """Send the command to turn the light on."""
-        self.device.send_cmd('off')
-        self._controller.read_data()
+        with mochad.REQ_LOCK:
+            self.device.send_cmd('off')
+            self._controller.read_data()
         self._state = False
diff --git a/homeassistant/components/mochad.py b/homeassistant/components/mochad.py
index 165c43f488f..3cc4eda7675 100644
--- a/homeassistant/components/mochad.py
+++ b/homeassistant/components/mochad.py
@@ -5,6 +5,7 @@ For more details about this component, please refer to the documentation at
 https://home-assistant.io/components/mochad/
 """
 import logging
+import threading
 
 import voluptuous as vol
 
@@ -23,6 +24,8 @@ CONF_COMM_TYPE = 'comm_type'
 
 DOMAIN = 'mochad'
 
+REQ_LOCK = threading.Lock()
+
 CONFIG_SCHEMA = vol.Schema({
     DOMAIN: vol.Schema({
         vol.Optional(CONF_HOST, default='localhost'): cv.string,
diff --git a/homeassistant/components/switch/mochad.py b/homeassistant/components/switch/mochad.py
index a67b27a6a91..da8f96dc1f0 100644
--- a/homeassistant/components/switch/mochad.py
+++ b/homeassistant/components/switch/mochad.py
@@ -60,18 +60,21 @@ class MochadSwitch(SwitchDevice):
     def turn_on(self, **kwargs):
         """Turn the switch on."""
         self._state = True
-        self.device.send_cmd('on')
-        self._controller.read_data()
+        with mochad.REQ_LOCK:
+            self.device.send_cmd('on')
+            self._controller.read_data()
 
     def turn_off(self, **kwargs):
         """Turn the switch off."""
         self._state = False
-        self.device.send_cmd('off')
-        self._controller.read_data()
+        with mochad.REQ_LOCK:
+            self.device.send_cmd('off')
+            self._controller.read_data()
 
     def _get_device_status(self):
         """Get the status of the switch from mochad."""
-        status = self.device.get_status().rstrip()
+        with mochad.REQ_LOCK:
+            status = self.device.get_status().rstrip()
         return status == 'on'
 
     @property