Added a ThingSpeak component (#4027)

* Added a ThingSpeak component

* Forgot a colon. Fixed it

* Some config variables are better required

* New requirements created by the script

* Updated the .coveragerc

* Fixed small linting errors

* Removed unneccessary validation

* Even more linting error fixes

* Changed the way the component listens to state changes

* Removed unneccessary declaration of 'state' variable, referring to new_state instead

.coveragerc

@@ -307,6 +307,7 @@ omit =
     homeassistant/components/switch/tplink.py
     homeassistant/components/switch/transmission.py
     homeassistant/components/switch/wake_on_lan.py
+    homeassistant/components/thingspeak.py
     homeassistant/components/upnp.py
     homeassistant/components/weather/openweathermap.py
     homeassistant/components/zeroconf.py

homeassistant/components/thingspeak.py

@@ -0,0 +1,70 @@
+"""A component to submit data to thingspeak."""
+import logging
+
+import voluptuous as vol
+
+from homeassistant.const import (
+    CONF_API_KEY, CONF_ID, CONF_WHITELIST,
+    STATE_UNAVAILABLE, STATE_UNKNOWN)
+from homeassistant.helpers import state as state_helper
+import homeassistant.helpers.config_validation as cv
+import homeassistant.helpers.event as event
+
+REQUIREMENTS = ['thingspeak==0.4.0']
+
+_LOGGER = logging.getLogger(__name__)
+
+DOMAIN = 'thingspeak'
+TIMEOUT = 5
+
+# Validate the config
+CONFIG_SCHEMA = vol.Schema({
+    DOMAIN: vol.Schema({
+        vol.Required(CONF_API_KEY): cv.string,
+        vol.Required(CONF_ID): int,
+        vol.Required(CONF_WHITELIST): cv.string
+        }),
+    }, extra=vol.ALLOW_EXTRA)
+
+
+def setup(hass, config):
+    """Setup the thingspeak environment."""
+    import thingspeak
+
+    # Read out config values
+    conf = config[DOMAIN]
+    api_key = conf.get(CONF_API_KEY)
+    channel_id = conf.get(CONF_ID)
+    entity = conf.get(CONF_WHITELIST)
+
+    try:
+        channel = thingspeak.Channel(
+            channel_id, api_key=api_key, timeout=TIMEOUT)
+        channel.get()
+    except:
+        _LOGGER.error("Error while accessing the ThingSpeak channel. "
+                      "Please check that the channel exists and your "
+                      "API key is correct.")
+        return False
+
+    def thingspeak_listener(entity_id, old_state, new_state):
+        """Listen for new events and send them to thingspeak."""
+        if new_state is None or new_state.state in (
+                STATE_UNKNOWN, '', STATE_UNAVAILABLE):
+            return
+        try:
+            if new_state.entity_id != entity:
+                return
+            _state = state_helper.state_as_number(new_state)
+        except ValueError:
+            return
+        try:
+            channel.update({'field1': _state})
+        except:
+            _LOGGER.error(
+                'Error while sending value "%s" to Thingspeak',
+                _state)
+
+    event.track_state_change(hass, entity, thingspeak_listener)
+
+    return True

requirements_all.txt

@@ -495,6 +495,9 @@ tellive-py==0.5.2
 # homeassistant.components.sensor.temper
 temperusb==1.5.1
 
+# homeassistant.components.thingspeak
+thingspeak==0.4.0
+
 # homeassistant.components.sensor.transmission
 # homeassistant.components.switch.transmission
 transmissionrpc==0.11