diff --git a/esphome/components/api.py b/esphome/components/api.py
index 544d0e418b..86e77bb4c6 100644
--- a/esphome/components/api.py
+++ b/esphome/components/api.py
@@ -86,7 +86,7 @@ def lib_deps(config):
     if CORE.is_esp32:
         return 'AsyncTCP@1.0.3'
     if CORE.is_esp8266:
-        return 'ESPAsyncTCP@1.2.0'
+        return 'ESPAsyncTCP@1.1.3'
     raise NotImplementedError
 
 
diff --git a/esphome/components/sensor/ppd42x.py b/esphome/components/sensor/ppd42x.py
new file mode 100644
index 0000000000..70b0a27732
--- /dev/null
+++ b/esphome/components/sensor/ppd42x.py
@@ -0,0 +1,53 @@
+import voluptuous as vol
+
+from esphome import pins
+from esphome.components import sensor
+import esphome.config_validation as cv
+from esphome.const import CONF_PM_2_5, CONF_ID, CONF_PM_10_0, CONF_PM_2_5, CONF_NAME, CONF_PM_10_0, \
+    CONF_UPDATE_INTERVAL, CONF_TIMEOUT
+from esphome.cpp_generator import Pvariable, add
+from esphome.cpp_helpers import gpio_input_pin_expression, gpio_output_pin_expression, \
+    setup_component
+from esphome.cpp_types import App
+
+
+Ppd42xSensorComponent = sensor.sensor_ns.class_('Ppd42xSensorComponent',
+                                                    sensor.PollingSensorComponent)
+
+
+PLATFORM_SCHEMA = cv.nameable(sensor.SENSOR_PLATFORM_SCHEMA.extend({
+    cv.GenerateID(): cv.declare_variable_id(Ppd42xSensorComponent),
+    vol.Optional(CONF_PM_10_0): vol.All(pins.internal_gpio_input_pin_schema,
+                                    pins.validate_has_interrupt),
+    vol.Optional(CONF_PM_2_5):  vol.All(pins.internal_gpio_input_pin_schema,
+                                    pins.validate_has_interrupt),
+    vol.Required(CONF_TIMEOUT): cv.positive_time_period_microseconds,
+    vol.Optional(CONF_UPDATE_INTERVAL): cv.update_interval,
+
+}))
+
+
+def to_code(config):
+    for pm_10_0 in gpio_input_pin_expression(config[CONF_PM_10_0]):
+        yield
+    for pm_02_5 in gpio_input_pin_expression(config[CONF_PM_2_5]):
+        yield
+    rhs = App.make_ppd42x_sensor(config[CONF_NAME], pm_10_0, pm_02_5,
+                                     config.get(CONF_UPDATE_INTERVAL))
+    ppd42x = Pvariable(config[CONF_ID], rhs)
+
+    if CONF_TIMEOUT in config:
+        add(ppd42x.set_timeout_us(config[CONF_TIMEOUT]))
+
+    if CONF_PM_2_5 in config:
+        conf = config[CONF_PM_2_5]
+        sensor.register_sensor(ppd42x.make_pm_2_5_sensor(conf[CONF_NAME]), conf)
+    if CONF_PM_10_0 in config:
+        conf = config[CONF_PM_10_0]
+        sensor.register_sensor(ppd42x.make_pm_10_0_sensor(conf[CONF_NAME]), conf)
+
+    sensor.setup_sensor(ppd42x, config)
+    setup_component(ppd42x, config)
+
+
+BUILD_FLAGS = '-DUSE_PPD42X_SENSOR'
diff --git a/esphome/writer.py b/esphome/writer.py
index 9c2bc8fbd8..953680e467 100644
--- a/esphome/writer.py
+++ b/esphome/writer.py
@@ -290,7 +290,7 @@ def gather_lib_deps():
             lib_deps.add('AsyncTCP@1.0.1')
         lib_deps.add('ESPmDNS')
     elif CORE.is_esp8266:
-        lib_deps.add('ESPAsyncTCP@1.2.0')
+        lib_deps.add('ESPAsyncTCP@1.1.3')
         lib_deps.add('ESP8266mDNS')
 
     # avoid changing build flags order