I just purchased this same sensor and had the same question. It's pretty insane that Google Home does not have a simple / clear way to do this. There are currently two ways that I've found, but using the Google Home app way is basically useless do to how repeat notifications work (see below):
In Google Home App
1. Create a new Household Automation / Routine. It has to be Household in order to respond to a device (b/c?)
2.For Starter: Select "When a device does something" and then the door/window sensor. Then click Opens or closes and select "Opens".
3. For the "Action": Select "Communicate and announce" and then "Make an Announcement". Click "Announce on device that starts the routine". And enter the message "Door Open" or whatever.
Be sure to save everything for the automation.
Despite using the weird "Announce on device that starts the routine" setting, this should popup a notification on your phone (despite being a Household routine).
The problem with this, is that only the first notification that comes to the phone will make a sound unless you clear the notification. So if you're say leaving the house, you'll get a Ding sound with the notification on your phone. But if you don't clear the notification in your phone's log, you won't get another notification sound (it will simply update the timestamp on the same notification). This makes it pretty useless for knowing when someone enters your home, so hopefully they update this soon!
Using the Web-Based Automation Script Editor
1. Open the Google Home Website: https://home.google.com/
2. Click Automations
3. Click Add New
4. Paste the following into the script editor, replacing the previous script:
# ------------------------------------------------------------------------------------------ #
# Lines starting with “#” are comments and will be ignored by the automation.
# Indentation determines hierarchy within the script.
# Visit g.co/home/script-editor-docs for full documentation.
# ------------------------------------------------------------------------------------------ #
metadata:
name: Door Open Alert # Choose a short name that summarizes important starters and actions, like “Sunset lights”.
description: Do something when the door opens. # Write a detailed description that includes everything the automation does, like “At sunset, on weekdays, close blinds, turn on lights to 50%, and play the sunset playlist on certain speakers.”
automations:
# “starters” and “actions” are required; “conditions” are optional.
# Use Ctrl + Space to see autocomplete suggestions.
# ---- STARTERS ---- #
# Starters describe events that will start the automation.
# To add more than one starter, duplicate the "- type" section under "starters".
# If you add multiple starter events, any one of them happening will start the automation.
starters:
- type: device.state.OpenClose
state: openPercent
# [available operators: is, isNot, lessThan, lessThanOrEqualTo, greaterThan, greaterThanOrEqualTo]
is: 100
device: <Device Name> - <Room Name>
# ---- CONDITIONS ---- #
# Conditions are optional. Delete this section if it’s empty.
# Conditions will prevent an automation from starting if the conditions aren’t met.
# See g.co/home/script-editor-docs for documentation about how to use logical operators like “and”, “or”, and “not”.
#condition:
# type:
# ---- ACTIONS ---- #
# Actions will start when a starter event takes place and all conditions are met.
# Actions will start in the order they appear in the script and with any delay specified.
# To add more than one action, duplicate the "- type" section under "actions".
actions:
- type: home.command.Notification # Send a notification to the specified home members.
# [Available parameter options: title, body, members]
title: Door Opened
body: Door was opened.
members:
- ***Edit this to select who receives the notification.***
5. Edit the device: line. Delete the Device Name - Room Name text and it should auto-complete with the possible devices that you have added.
6. Edit the members: line and delete the comment and it should show available members. You can add another by copying that line (indentation and dash matter).
7. Click Validate and then Save once there are no errors.
This method appears to send a new notification (and play your notification sound) for each open event. There is also a note in their script editor: "Coming Soon: ... New actions like custom notifications". This would be great as some notifications may be more important than others. Hopefully it allows us to get rid of the somewhat useless "Automation by XXX" text that appears in the notification.
