Welcome to the Google Home Developer Center, the new destination for learning how to develop smart home actions.
Note:
You'll continue building actions in the Actions console.
When you have a conversation with
Google Assistant
such as "Hey
Google, turn on the bedroom light",
Hey Google
is the invocation and
turn on the bedroom light
is known as the grammar. Google determines
the
smart home
intent from the grammar and sends it over to
the developer cloud (fulfillment). The developer can then execute the command
on the device and returns a response back to Google.
After fulfillment processes an intent and returns a response,
smart home
Actions rely on the
Google Home Graph
.
With
Home Graph
,
Assistant
can sync
devices, query device states, and execute commands on a device.
Device types
Device types let
Assistant
know what grammar should be
used with your device. For example, if you define a device as a
Light
, the user can interact with the device through
Assistant
with
Hey Google, turn on my light
.
See
Device types
for the full list of supported
device types.
Device traits
Device traits define the capabilities of a device type. You can combine
multiple device traits with any device type. For example, you can have a
Light
device use the
OnOff
,
Brightness
, and
FanSpeed
traits. While the
FanSpeed
trait might not be the
most common trait to use for a light, you can use any trait that you want for
your new device.
When you add a device trait to your device type, your device inherits the
states of each device trait that you add. For example, when you use the
OnOff
trait, your device can now report its
on
state as
true
or
false
.
See
Device Traits
for the full list of supported
traits.