How to Integrate Nest into Home Assistant with Smart Device Management

Follow this YouTube video for a step by step guide:

 

 

This is the code used for the nest thermostat and the nest doorbell:

Substitute the project-id and the device-id, feel free to use another value from the json response file.

sensor:
  - platform: rest
    name: nest_thermostat
    resource: https://smartdevicemanagement.googleapis.com/v1/enterprises/project-id/devices/device-id
    method: GET
    headers: 
      Content-Type: application/json
      Authorization: !secret my_sensor_secret_token
    value_template: "{{ value_json['traits']['sdm.devices.traits.Temperature']['ambientTemperatureCelsius'] }}"
    json_attributes:
     - traits

  - platform: rest
    name: nest_hello_doorbell
    resource: https://smartdevicemanagement.googleapis.com/v1/enterprises/project-id/devices/device-id
    method: GET
    headers:
      Content-Type: application/json
      Authorization: !secret my_sensor_secret_token
    value_template: "{{ value_json['type'] }}"
    json_attributes:
    - type
    - traits
    - sdm.devices.traits.CameraLiveStream
    - sdm.devices.traits.CameraMotion
    - sdm.devices.traits.CameraPerson
    - sdm.devices.traits.CameraSound
    - sdm.devices.traits.DoorbellChime
    - sdm.devices.traits.Info

In this blog post you can find the solution to the refresh token: Reddit Post

You will need node-red up and running with the following two add-ons in addition.

• node-red-contrib-image-output
• node-red-contrib-google-cloud

I created these two automations based on entities create in my video and in the Blog post

 

Automations

Whenever the nest hello senses that there is a person in the view of the camera we are going to turn on our front door porch light.

#front_door_motion_start.yaml
alias: Turn on Front Door light when motion triggered on Nest Hello

trigger: 
  platform: state
  entity_id: sensor.nest_doorbell_chime_time, sensor.nest_doorbell_person_time
action:
  service: light.turn_on
  entity_id: light.front_porch
condition:
  condition: state
  entity_id: sun.sun
  state: 'below_horizon'

#front_door_motion_end.yaml
alias: Turn off porch light after 30 seconds of front door motion
trigger:
  platform: state
  entity_id: light.front_porch
  from: 'off'
  to: 'on'
  for: '00:00:30'
action:
  service: light.turn_off
  entity_id: light.front_porch

Broadcast that there is a person at the door

alias: Google Mini announce movement on the front door

trigger: 
  platform: state
  entity_id: sensor.nest_doorbell_person_time
action:
  - service: tts.google_say
    data:
      entity_id: media_player.kitchen_speaker
      message: There is someone at your front door!
  - service: script.sonos_say
    data_template:
      sonos_entity: media_player.lounge
      volume: 0.2
      message: There is someone at your front door!