diff --git a/esphome/components/pulse_width/sensor.py b/esphome/components/pulse_width/sensor.py
index 0227adffce..8328da2ac0 100644
--- a/esphome/components/pulse_width/sensor.py
+++ b/esphome/components/pulse_width/sensor.py
@@ -10,7 +10,7 @@ PulseWidthSensor = pulse_width_ns.class_('PulseWidthSensor', sensor.Sensor, cg.P
 
 CONFIG_SCHEMA = sensor.sensor_schema(UNIT_SECOND, ICON_TIMER, 3).extend({
     cv.GenerateID(): cv.declare_id(PulseWidthSensor),
-    cv.Required(CONF_PIN): cv.All(pins.internal_gpio_input_pullup_pin_schema,
+    cv.Required(CONF_PIN): cv.All(pins.internal_gpio_input_pin_schema,
                                   pins.validate_has_interrupt),
 }).extend(cv.polling_component_schema('60s'))
 
diff --git a/esphome/components/status/status_binary_sensor.cpp b/esphome/components/status/status_binary_sensor.cpp
index d004c70b95..7fbeb8c171 100644
--- a/esphome/components/status/status_binary_sensor.cpp
+++ b/esphome/components/status/status_binary_sensor.cpp
@@ -1,6 +1,7 @@
 #include "status_binary_sensor.h"
 #include "esphome/core/log.h"
 #include "esphome/core/util.h"
+#include "esphome/core/defines.h"
 
 #ifdef USE_MQTT
 #include "esphome/components/mqtt/mqtt_client.h"
diff --git a/esphome/const.py b/esphome/const.py
index d58ed406c7..d3da18448e 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -19,6 +19,7 @@ ARDUINO_VERSION_ESP8266_DEV = 'https://github.com/platformio/platform-espressif8
                               '/stage'
 ARDUINO_VERSION_ESP8266_2_5_0 = 'espressif8266@2.0.0'
 ARDUINO_VERSION_ESP8266_2_5_1 = 'espressif8266@2.1.0'
+ARDUINO_VERSION_ESP8266_2_5_2 = 'espressif8266@2.2.0'
 ARDUINO_VERSION_ESP8266_2_3_0 = 'espressif8266@1.5.0'
 SOURCE_FILE_EXTENSIONS = {'.cpp', '.hpp', '.h', '.c', '.tcc', '.ino'}
 HEADER_FILE_EXTENSIONS = {'.h', '.hpp', '.tcc'}
diff --git a/esphome/core_config.py b/esphome/core_config.py
index a2663b8db8..d02b7c98de 100644
--- a/esphome/core_config.py
+++ b/esphome/core_config.py
@@ -11,7 +11,7 @@ from esphome.const import ARDUINO_VERSION_ESP32_DEV, ARDUINO_VERSION_ESP8266_DEV
     CONF_NAME, CONF_ON_BOOT, CONF_ON_LOOP, CONF_ON_SHUTDOWN, CONF_PLATFORM, \
     CONF_PLATFORMIO_OPTIONS, CONF_PRIORITY, CONF_TRIGGER_ID, \
     CONF_ESP8266_RESTORE_FROM_FLASH, __version__, ARDUINO_VERSION_ESP8266_2_3_0, \
-    ARDUINO_VERSION_ESP8266_2_5_0, ARDUINO_VERSION_ESP8266_2_5_1
+    ARDUINO_VERSION_ESP8266_2_5_0, ARDUINO_VERSION_ESP8266_2_5_1, ARDUINO_VERSION_ESP8266_2_5_2
 from esphome.core import CORE, coroutine_with_priority
 from esphome.pins import ESP8266_FLASH_SIZES, ESP8266_LD_SCRIPTS
 
@@ -44,6 +44,7 @@ def validate_board(value):
 validate_platform = cv.one_of('ESP32', 'ESP8266', upper=True)
 
 PLATFORMIO_ESP8266_LUT = {
+    '2.5.2': 'espressif8266@2.2.0',
     '2.5.1': 'espressif8266@2.1.0',
     '2.5.0': 'espressif8266@2.0.1',
     '2.4.2': 'espressif8266@1.8.0',
@@ -193,7 +194,7 @@ def to_code(config):
                                     'espressif8266@1.6.0'):
             ld_script = ld_scripts[0]
         elif CORE.arduino_version in (ARDUINO_VERSION_ESP8266_DEV, ARDUINO_VERSION_ESP8266_2_5_0,
-                                      ARDUINO_VERSION_ESP8266_2_5_1):
+                                      ARDUINO_VERSION_ESP8266_2_5_1, ARDUINO_VERSION_ESP8266_2_5_2):
             ld_script = ld_scripts[1]
 
         if ld_script is not None: