Add MPR121 Capacitive Touch Sensor (#449)

* module mpr121

* added mpr121 sensor and binary sensor

* added tests

* removed CONF_CHANNELS, it is not supported in the esphome-code mpr121
code

* changed namespace for mpr121 to binary_sensor

* Update esphome/components/binary_sensor/mpr121.py

Co-Authored-By: mvturnho <qris.online@gmail.com>

* fixed class names

* fix lint errors

esphome/components/binary_sensor/mpr121.py

@@ -0,0 +1,28 @@
+import voluptuous as vol
+
+from esphome.components import binary_sensor
+from esphome.components.mpr121 import MPR121Component, CONF_MPR121_ID
+import esphome.config_validation as cv
+from esphome.const import CONF_CHANNEL, CONF_NAME
+from esphome.cpp_generator import get_variable
+
+DEPENDENCIES = ['mpr121']
+MPR121Channel = binary_sensor.binary_sensor_ns.class_(
+    'MPR121Channel', binary_sensor.BinarySensor)
+
+PLATFORM_SCHEMA = cv.nameable(binary_sensor.BINARY_SENSOR_PLATFORM_SCHEMA.extend({
+    cv.GenerateID(): cv.declare_variable_id(MPR121Channel),
+    cv.GenerateID(CONF_MPR121_ID): cv.use_variable_id(MPR121Component),
+    vol.Required(CONF_CHANNEL): vol.All(vol.Coerce(int), vol.Range(min=0, max=11))
+}))
+
+
+def to_code(config):
+    for hub in get_variable(config[CONF_MPR121_ID]):
+        yield
+    rhs = MPR121Channel.new(config[CONF_NAME], config[CONF_CHANNEL])
+    binary_sensor.register_binary_sensor(hub.add_channel(rhs), config)
+
+
+def to_hass_config(data, config):
+    return binary_sensor.core_to_hass_config(data, config)

esphome/components/mpr121.py

@@ -0,0 +1,29 @@
+import voluptuous as vol
+
+from esphome.components import i2c, binary_sensor
+import esphome.config_validation as cv
+from esphome.const import CONF_ADDRESS, CONF_ID
+from esphome.cpp_generator import Pvariable
+from esphome.cpp_helpers import setup_component
+from esphome.cpp_types import App, Component
+
+DEPENDENCIES = ['i2c']
+MULTI_CONF = True
+
+CONF_MPR121_ID = 'mpr121_id'
+MPR121Component = binary_sensor.binary_sensor_ns.class_('MPR121Component', Component, i2c.I2CDevice)
+
+CONFIG_SCHEMA = vol.Schema({
+    cv.GenerateID(): cv.declare_variable_id(MPR121Component),
+    vol.Optional(CONF_ADDRESS): cv.i2c_address
+}).extend(cv.COMPONENT_SCHEMA.schema)
+
+
+def to_code(config):
+    rhs = App.make_mpr121(config.get(CONF_ADDRESS))
+    var = Pvariable(config[CONF_ID], rhs)
+
+    setup_component(var, config)
+
+
+BUILD_FLAGS = '-DUSE_MPR121'

esphome/const.py

@@ -59,6 +59,7 @@ CONF_PCA9685 = 'pca9685'
 CONF_PCA9685_ID = 'pca9685_id'
 CONF_OUTPUT = 'output'
 CONF_CHANNEL = 'channel'
+CONF_CHANNELS = 'channels'
 CONF_LIGHT = 'light'
 CONF_RED = 'red'
 CONF_GREEN = 'green'

tests/test3.yaml

@@ -102,6 +102,10 @@ time:
 apds9960:
   address: 0x20
   update_interval: 60s
+  
+mpr121:
+  id: mpr121_first
+  address: 0x5A
 
 binary_sensor:
   - platform: apds9960
@@ -119,6 +123,23 @@ binary_sensor:
   - platform: homeassistant
     entity_id: binary_sensor.hello_world
     id: ha_hello_world_binary
+#mpr121
+  - platform: mpr121
+    id: touchkey0
+    channel: 0
+    name: "touchkey0"
+  - platform: mpr121
+    channel: 1
+    name: "touchkey1"
+  - platform: mpr121
+    channel: 2
+    name: "touchkey2"
+  - platform: mpr121
+    channel: 3
+    name: "touchkey3"
+    on_press:
+      then:
+        - switch.toggle: mpr121_toggle
 
 remote_receiver:
   pin: GPIO12
@@ -158,6 +179,12 @@ script:
     then:
       - lambda: 'ESP_LOGD("main", "Hello World!");'
 
+switch:
+  - platform: template
+    name: "mpr121_toggle"
+    id: mpr121_toggle
+    optimistic: True
+
 stepper:
   - platform: uln2003
     id: my_stepper