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Smart Home & IoT by @mitchellbernstein

google-home

Control Google Nest devices (thermostats, cameras, doorbells)

Google Home / Nest CLI

Control Google Nest devices via the Smart Device Management (SDM) API using curl + jq.

Setup (Required)

  1. Create a Google Cloud Project

  2. Enable the SDM API

    • APIs & Services → Library
    • Search "Smart Device Management"
    • Enable it

  3. Create OAuth Credentials

    • APIs & Services → Credentials
    • Create OAuth 2.0 Client ID
    • Download the JSON file
    • Extract client_id and client_secret

  4. Register Your Devices

  5. Get Access Token

    # Replace with your values
curl -s \
  -d "client_id=YOUR_CLIENT_ID" \
  -d "client_secret=YOUR_CLIENT_SECRET" \
  -d "refresh_token=YOUR_REFRESH_TOKEN" \
  -d "grant_type=refresh_token" \
  https://www.googleapis.com/oauth2/v4/token

Quick Start

# List devices
google-home-cli devices

# Get thermostat info
google-home-cli thermostat "Living Room" --info

# Set temperature (heat/cool/auto)
google-home-cli thermostat "Living Room" --temp 72

# Query camera
google-home-cli camera "Front Door" --status

Device Commands

Thermostats

  • google-home-cli thermostat <name> — show current temp/humidity
  • --temp <degrees> — set target temperature
  • --mode heat|cool|auto — set HVAC mode
  • --fan on|auto — control fan

Cameras & Doorbells

  • google-home-cli camera <name> — get stream/status
  • --snapshot — download current image
  • --stream — start live stream URL

Speakers & Displays

  • google-home-cli speaker <name> — device info
  • --volume 0-100 — set volume
  • --stop — stop playback

Environment Variables

export GOOGLE_HOME_CLIENT_ID="your-client-id"
export GOOGLE_HOME_CLIENT_SECRET="your-client-secret"
export GOOGLE_HOME_ACCESS_TOKEN="your-access-token"

Alternative: Direct API Calls

# List all devices
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" \
  "https://smartdevicemanagement.googleapis.com/v1/enterprises/YOUR_PROJECT_ID/devices"

# Get device traits
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" \
  "https://smartdevicemanagement.googleapis.com/v1/enterprises/YOUR_PROJECT_ID/devices/YOUR_DEVICE_ID"

Helper Script

A nest CLI helper is included at scripts/nest:

# Make it available globally
ln -sf /Users/mitchellbernstein/clawd/skills/google-home/scripts/nest /usr/local/bin/nest

# List devices
nest list

# Get thermostat status
nest status "enterprises/PROJECT_ID/devices/DEVICE_ID"

# Set temperature (Celsius)
nest temp "enterprises/PROJECT_ID/devices/DEVICE_ID" 22

# Set mode
nest mode "enterprises/PROJECT_ID/devices/DEVICE_ID" HEAT

Configuration

Create ~/.config/google-home/config.json:

{
  "project_id": "your-google-cloud-project-id",
  "access_token": "your-oauth-access-token"
}

Notes

  • Tokens expire; refresh them periodically
  • Device names use full path: enterprises/PROJECT_ID/devices/DEVICE_ID
  • Temperature is in Celsius (convert from Fahrenheit if needed)
  • Camera streams require additional permissions