Add ADE7953 Support (#593)

* Add ADE795 support

* Lint

* Fix

* Fix, add test

esphome/components/ade7953/sensor.py

@@ -0,0 +1,39 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import sensor, i2c
+from esphome.const import CONF_ID, CONF_VOLTAGE, \
+    UNIT_VOLT, ICON_FLASH, UNIT_AMPERE, UNIT_WATT
+
+DEPENDENCIES = ['i2c']
+
+ace7953_ns = cg.esphome_ns.namespace('ade7953')
+ADE7953 = ace7953_ns.class_('ADE7953', cg.PollingComponent, i2c.I2CDevice)
+
+CONF_CURRENT_A = 'current_a'
+CONF_CURRENT_B = 'current_b'
+CONF_ACTIVE_POWER_A = 'active_power_a'
+CONF_ACTIVE_POWER_B = 'active_power_b'
+
+CONFIG_SCHEMA = cv.Schema({
+    cv.GenerateID(): cv.declare_id(ADE7953),
+
+    cv.Optional(CONF_VOLTAGE): sensor.sensor_schema(UNIT_VOLT, ICON_FLASH, 1),
+    cv.Optional(CONF_CURRENT_A): sensor.sensor_schema(UNIT_AMPERE, ICON_FLASH, 2),
+    cv.Optional(CONF_CURRENT_B): sensor.sensor_schema(UNIT_AMPERE, ICON_FLASH, 2),
+    cv.Optional(CONF_ACTIVE_POWER_A): sensor.sensor_schema(UNIT_WATT, ICON_FLASH, 1),
+    cv.Optional(CONF_ACTIVE_POWER_B): sensor.sensor_schema(UNIT_WATT, ICON_FLASH, 1),
+}).extend(cv.polling_component_schema('60s')).extend(i2c.i2c_device_schema(0x38))
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield cg.register_component(var, config)
+    yield i2c.register_i2c_device(var, config)
+
+    for key in [CONF_VOLTAGE, CONF_CURRENT_A, CONF_CURRENT_B, CONF_ACTIVE_POWER_A,
+                CONF_ACTIVE_POWER_B]:
+        if key not in config:
+            continue
+        conf = config[key]
+        sens = yield sensor.new_sensor(conf)
+        cg.add(getattr(var, 'set_{}_sensor'.format(key))(sens))