diff --git a/.coveragerc b/.coveragerc
index 169b73b7899697e9cb9d57c62fc59046809d9d6a..b0d6a40c7f7fb39a8c161e69d94c38ad4718a5fe 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -499,6 +499,7 @@ omit =
homeassistant/components/panasonic_bluray/media_player.py
homeassistant/components/panasonic_viera/media_player.py
homeassistant/components/pandora/media_player.py
+ homeassistant/components/pcal9535a/*
homeassistant/components/pencom/switch.py
homeassistant/components/philips_js/media_player.py
homeassistant/components/pi_hole/sensor.py
diff --git a/CODEOWNERS b/CODEOWNERS
index 0a02fbc53218d9eaf6d5a8df740c4dba188580fc..cb3d0817d59fea4b36e8044d675203c81127c974 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -225,6 +225,7 @@ homeassistant/components/oru/* @bvlaicu
homeassistant/components/owlet/* @oblogic7
homeassistant/components/panel_custom/* @home-assistant/frontend
homeassistant/components/panel_iframe/* @home-assistant/frontend
+homeassistant/components/pcal9535a/* @Shulyaka
homeassistant/components/persistent_notification/* @home-assistant/core
homeassistant/components/philips_js/* @elupus
homeassistant/components/pi_hole/* @fabaff @johnluetke
diff --git a/homeassistant/components/pcal9535a/__init__.py b/homeassistant/components/pcal9535a/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..fa1295939be2e156c35b2d328a8ca9f45a88fcc9
--- /dev/null
+++ b/homeassistant/components/pcal9535a/__init__.py
@@ -0,0 +1,3 @@
+"""Support for I2C PCAL9535A chip."""
+
+DOMAIN = "pcal9535a"
diff --git a/homeassistant/components/pcal9535a/binary_sensor.py b/homeassistant/components/pcal9535a/binary_sensor.py
new file mode 100644
index 0000000000000000000000000000000000000000..fd4e92ccf0335d83cb4c1f22056ac8d9c703aa38
--- /dev/null
+++ b/homeassistant/components/pcal9535a/binary_sensor.py
@@ -0,0 +1,93 @@
+"""Support for binary sensor using I2C PCAL9535A chip."""
+import logging
+
+import voluptuous as vol
+from pcal9535a import PCAL9535A
+
+from homeassistant.components.binary_sensor import BinarySensorDevice, PLATFORM_SCHEMA
+from homeassistant.const import DEVICE_DEFAULT_NAME
+import homeassistant.helpers.config_validation as cv
+
+_LOGGER = logging.getLogger(__name__)
+
+CONF_INVERT_LOGIC = "invert_logic"
+CONF_I2C_ADDRESS = "i2c_address"
+CONF_I2C_BUS = "i2c_bus"
+CONF_PINS = "pins"
+CONF_PULL_MODE = "pull_mode"
+
+MODE_UP = "UP"
+MODE_DOWN = "DOWN"
+MODE_DISABLED = "DISABLED"
+
+DEFAULT_INVERT_LOGIC = False
+DEFAULT_I2C_ADDRESS = 0x20
+DEFAULT_I2C_BUS = 1
+DEFAULT_PULL_MODE = MODE_DISABLED
+
+_SENSORS_SCHEMA = vol.Schema({cv.positive_int: cv.string})
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
+ {
+ vol.Required(CONF_PINS): _SENSORS_SCHEMA,
+ vol.Optional(CONF_INVERT_LOGIC, default=DEFAULT_INVERT_LOGIC): cv.boolean,
+ vol.Optional(CONF_PULL_MODE, default=DEFAULT_PULL_MODE): vol.All(
+ vol.Upper, vol.In([MODE_UP, MODE_DOWN, MODE_DISABLED])
+ ),
+ vol.Optional(CONF_I2C_ADDRESS, default=DEFAULT_I2C_ADDRESS): vol.Coerce(int),
+ vol.Optional(CONF_I2C_BUS, default=DEFAULT_I2C_BUS): cv.positive_int,
+ }
+)
+
+
+def setup_platform(hass, config, add_entities, discovery_info=None):
+ """Set up the PCAL9535A binary sensors."""
+ pull_mode = config[CONF_PULL_MODE]
+ invert_logic = config[CONF_INVERT_LOGIC]
+ i2c_address = config[CONF_I2C_ADDRESS]
+ bus = config[CONF_I2C_BUS]
+
+ pcal = PCAL9535A(bus, i2c_address)
+
+ binary_sensors = []
+ pins = config[CONF_PINS]
+
+ for pin_num, pin_name in pins.items():
+ pin = pcal.get_pin(pin_num // 8, pin_num % 8)
+ binary_sensors.append(
+ PCAL9535ABinarySensor(pin_name, pin, pull_mode, invert_logic)
+ )
+
+ add_entities(binary_sensors, True)
+
+
+class PCAL9535ABinarySensor(BinarySensorDevice):
+ """Represent a binary sensor that uses PCAL9535A."""
+
+ def __init__(self, name, pin, pull_mode, invert_logic):
+ """Initialize the PCAL9535A binary sensor."""
+ self._name = name or DEVICE_DEFAULT_NAME
+ self._pin = pin
+ self._pin.input = True
+ self._pin.inverted = invert_logic
+ if pull_mode == "DISABLED":
+ self._pin.pullup = 0
+ elif pull_mode == "DOWN":
+ self._pin.pullup = -1
+ else:
+ self._pin.pullup = 1
+ self._state = None
+
+ @property
+ def name(self):
+ """Return the name of the sensor."""
+ return self._name
+
+ @property
+ def is_on(self):
+ """Return the cached state of the entity."""
+ return self._state
+
+ def update(self):
+ """Update the GPIO state."""
+ self._state = self._pin.level
diff --git a/homeassistant/components/pcal9535a/manifest.json b/homeassistant/components/pcal9535a/manifest.json
new file mode 100644
index 0000000000000000000000000000000000000000..e2fb140c7a91dc9e1fab3e47085d75137c6f21e7
--- /dev/null
+++ b/homeassistant/components/pcal9535a/manifest.json
@@ -0,0 +1,10 @@
+{
+ "domain": "pcal9535a",
+ "name": "PCAL9535A I/O Expander",
+ "documentation": "https://www.home-assistant.io/components/pcal9535a",
+ "requirements": [
+ "pcal9535a==0.7"
+ ],
+ "dependencies": [],
+ "codeowners": ["@Shulyaka"]
+}
diff --git a/homeassistant/components/pcal9535a/switch.py b/homeassistant/components/pcal9535a/switch.py
new file mode 100644
index 0000000000000000000000000000000000000000..faebce5d67e396efe4b93211cd858886b945cae0
--- /dev/null
+++ b/homeassistant/components/pcal9535a/switch.py
@@ -0,0 +1,102 @@
+"""Support for switch sensor using I2C PCAL9535A chip."""
+import logging
+
+import voluptuous as vol
+from pcal9535a import PCAL9535A
+
+from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchDevice
+from homeassistant.const import DEVICE_DEFAULT_NAME
+import homeassistant.helpers.config_validation as cv
+
+_LOGGER = logging.getLogger(__name__)
+
+CONF_INVERT_LOGIC = "invert_logic"
+CONF_I2C_ADDRESS = "i2c_address"
+CONF_I2C_BUS = "i2c_bus"
+CONF_PINS = "pins"
+CONF_STRENGTH = "strength"
+
+STRENGTH_025 = "0.25"
+STRENGTH_050 = "0.5"
+STRENGTH_075 = "0.75"
+STRENGTH_100 = "1.0"
+
+DEFAULT_INVERT_LOGIC = False
+DEFAULT_I2C_ADDRESS = 0x20
+DEFAULT_I2C_BUS = 1
+DEFAULT_STRENGTH = STRENGTH_100
+
+_SWITCHES_SCHEMA = vol.Schema({cv.positive_int: cv.string})
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
+ {
+ vol.Required(CONF_PINS): _SWITCHES_SCHEMA,
+ vol.Optional(CONF_INVERT_LOGIC, default=DEFAULT_INVERT_LOGIC): cv.boolean,
+ vol.Optional(CONF_STRENGTH, default=DEFAULT_STRENGTH): vol.In(
+ [STRENGTH_025, STRENGTH_050, STRENGTH_075, STRENGTH_100]
+ ),
+ vol.Optional(CONF_I2C_ADDRESS, default=DEFAULT_I2C_ADDRESS): vol.Coerce(int),
+ vol.Optional(CONF_I2C_BUS, default=DEFAULT_I2C_BUS): cv.positive_int,
+ }
+)
+
+
+def setup_platform(hass, config, add_entities, discovery_info=None):
+ """Set up the PCAL9535A devices."""
+ invert_logic = config[CONF_INVERT_LOGIC]
+ i2c_address = config[CONF_I2C_ADDRESS]
+ bus = config[CONF_I2C_BUS]
+
+ pcal = PCAL9535A(bus, i2c_address)
+
+ switches = []
+ pins = config[CONF_PINS]
+ for pin_num, pin_name in pins.items():
+ pin = pcal.get_pin(pin_num // 8, pin_num % 8)
+ switches.append(PCAL9535ASwitch(pin_name, pin, invert_logic))
+
+ add_entities(switches)
+
+
+class PCAL9535ASwitch(SwitchDevice):
+ """Representation of a PCAL9535A output pin."""
+
+ def __init__(self, name, pin, invert_logic):
+ """Initialize the pin."""
+ self._name = name or DEVICE_DEFAULT_NAME
+ self._pin = pin
+ self._pin.inverted = invert_logic
+ self._pin.input = False
+ self._state = self._pin.level
+
+ @property
+ def name(self):
+ """Return the name of the switch."""
+ return self._name
+
+ @property
+ def should_poll(self):
+ """No polling needed."""
+ return False
+
+ @property
+ def is_on(self):
+ """Return true if device is on."""
+ return self._state
+
+ @property
+ def assumed_state(self):
+ """Return true if optimistic updates are used."""
+ return True
+
+ def turn_on(self, **kwargs):
+ """Turn the device on."""
+ self._pin.level = True
+ self._state = True
+ self.schedule_update_ha_state()
+
+ def turn_off(self, **kwargs):
+ """Turn the device off."""
+ self._pin.level = False
+ self._state = False
+ self.schedule_update_ha_state()
diff --git a/requirements_all.txt b/requirements_all.txt
index a34191c4a5c197a84bccf4ffa5810d31864230e8..6f0b40230ededec73d40b15876f718a86f7c022f 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -944,6 +944,9 @@ panacotta==0.1
# homeassistant.components.panasonic_viera
panasonic_viera==0.3.2
+# homeassistant.components.pcal9535a
+pcal9535a==0.7
+
# homeassistant.components.dunehd
pdunehd==1.3