diff --git a/homeassistant/components/hvac/zwave.py b/homeassistant/components/hvac/zwave.py
index 2747cc8eb32..f8cb3fa5c9e 100755
--- a/homeassistant/components/hvac/zwave.py
+++ b/homeassistant/components/hvac/zwave.py
@@ -120,8 +120,9 @@ class ZWaveHvac(ZWaveDeviceEntity, HvacDevice):
         # Current Temp
         for value in self._node.get_values(
                 class_id=COMMAND_CLASS_SENSOR_MULTILEVEL).values():
-            self._current_temperature = int(value.data)
-            self._unit = value.units
+            if value.label == 'Temperature':
+                self._current_temperature = int(value.data)
+                self._unit = value.units
         # Fan Mode
         for value in self._node.get_values(
                 class_id=COMMAND_CLASS_THERMOSTAT_FAN_MODE).values():
diff --git a/homeassistant/components/sensor/serial_pm.py b/homeassistant/components/sensor/serial_pm.py
index f625affce2c..a86fea74cea 100644
--- a/homeassistant/components/sensor/serial_pm.py
+++ b/homeassistant/components/sensor/serial_pm.py
@@ -7,7 +7,7 @@ https://home-assistant.io/components/sensor.serial_pm/
 import logging
 import voluptuous as vol
 
-from homeassistant.const import CONF_NAME, CONF_PLATFORM
+from homeassistant.const import CONF_NAME
 from homeassistant.helpers.entity import Entity
 import homeassistant.helpers.config_validation as cv
 from homeassistant.components.sensor import PLATFORM_SCHEMA
@@ -21,7 +21,6 @@ CONF_SERIAL_DEVICE = "serial_device"
 CONF_BRAND = "brand"
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
-    vol.Required(CONF_PLATFORM): 'serial_pm',
     vol.Optional(CONF_NAME, default=""): cv.string,
     vol.Required(CONF_SERIAL_DEVICE): cv.string,
     vol.Required(CONF_BRAND): cv.string,
diff --git a/homeassistant/components/thermostat/honeywell.py b/homeassistant/components/thermostat/honeywell.py
index b31dfea0b4b..6d9a4b790eb 100644
--- a/homeassistant/components/thermostat/honeywell.py
+++ b/homeassistant/components/thermostat/honeywell.py
@@ -139,7 +139,7 @@ class RoundThermostat(ThermostatDevice):
     @property
     def operation(self: ThermostatDevice) -> str:
         """Get the current operation of the system."""
-        return self.device.system_mode
+        return getattr(self.device, 'system_mode', None)
 
     @property
     def is_away_mode_on(self):
@@ -148,7 +148,8 @@ class RoundThermostat(ThermostatDevice):
 
     def set_hvac_mode(self: ThermostatDevice, hvac_mode: str) -> None:
         """Set the HVAC mode for the thermostat."""
-        self.device.system_mode = hvac_mode
+        if hasattr(self.device, 'system_mode'):
+            self.device.system_mode = hvac_mode
 
     def turn_away_mode_on(self):
         """Turn away on.
@@ -231,7 +232,7 @@ class HoneywellUSThermostat(ThermostatDevice):
     @property
     def operation(self: ThermostatDevice) -> str:
         """Return current operation ie. heat, cool, idle."""
-        return self._device.system_mode
+        return getattr(self._device, 'system_mode', None)
 
     def set_temperature(self, temperature):
         """Set target temperature."""
@@ -261,4 +262,5 @@ class HoneywellUSThermostat(ThermostatDevice):
 
     def set_hvac_mode(self: ThermostatDevice, hvac_mode: str) -> None:
         """Set the system mode (Cool, Heat, etc)."""
-        self._device.system_mode = hvac_mode
+        if hasattr(self._device, 'system_mode'):
+            self._device.system_mode = hvac_mode
diff --git a/homeassistant/components/thermostat/zwave.py b/homeassistant/components/thermostat/zwave.py
index 80766d47100..bd5e5d04b58 100644
--- a/homeassistant/components/thermostat/zwave.py
+++ b/homeassistant/components/thermostat/zwave.py
@@ -91,8 +91,9 @@ class ZWaveThermostat(zwave.ZWaveDeviceEntity, ThermostatDevice):
         # current Temp
         for _, value in self._node.get_values_for_command_class(
                 COMMAND_CLASS_SENSOR_MULTILEVEL).items():
-            self._current_temperature = int(value.data)
-            self._unit = value.units
+            if value.label == 'Temperature':
+                self._current_temperature = int(value.data)
+                self._unit = value.units
 
         # operation state
         for _, value in self._node.get_values(
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 7161f319b30..16930328693 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -1,7 +1,7 @@
 # coding: utf-8
 """Constants used by Home Assistant components."""
 
-__version__ = "0.26.0"
+__version__ = "0.26.1"
 REQUIRED_PYTHON_VER = (3, 4)
 
 PLATFORM_FORMAT = '{}.{}'