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    1.5.0 • Public • Published

    Homebridge Grohe Sense plugin

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    Homebridge plugin for controlling some of the aspects of Grohe Sense water security system using HomeKit.

    The following Grohe Sense components are supported:

    • Sense Guard main water inlet valve
    • Sense battery powered water leakage detector
    • Sense Plus mains powered water leakage detector


    Grohe Sense Guard sensor layout


    Released versions are published through npm and can be found here:

    You can also search for this plugin from the awesome Homebridge web UI and it will automagically be installed/updated for your.

    What is supported

    Plugin will automatically find and configure your Sense devices, and expose the following HomeKit services:

    • Sense Guard
      • Valve
      • Temperature Sensor
      • Leakage Sensor
      • Water pressure (log only)
      • Water flowrate (log only)
    • Sense
      • Leakage Sensor
      • Temperature Sensor
      • Humidity Sensor
      • Battery Service
    • Sense Plus (untested, as I dont have one)
      • Leakage Sensor
      • Temperature Sensor
      • Humidity Sensor

    What is not supported

    • The system collects a lot of interesting information that unfortunately have no suitable characteristics counterpart defined in the official Apple HAP. This include (but not limited to) for example :
      • water pressure
      • flow metrics
      • water consumption
      • statistics
      • notifications

    What I would like to see in the future

    • Proper OAuth library handling authentication
    • Displaying water pressure, flow metrics +++, but I have no idea what characteristics to use in Homebridge for this...

    Configuration section in config.json

    There is a Settings screen during plugin setup that helps you configure the configuration section shown below.

      "name": "Ondus",
      "refresh_token": "<Paste refresh token here>",
      "username": "<user@name.domain>",
      "password": "<secret>",
      "refresh_interval": 3600,
      "valve_control": true,
      "fakegato_support": true,
      "platform": "Ondus"

    refresh_token and username/password

    Note that for both refresh_token and username/password you must remove < > above when inserting your credentials.

    You do NOT need to provide the refresh_token if you provide your username/password. Some/many are more comfortable using a refresh_token than the actual username/password credentials themselves in a config file.


    How often to query Ondus API for new data. Default setting of 3600 seconds is more than sufficient, because sensors only report data every 24 hours unless a notification threshold has been exceeded.


    If you have kids like me with iCloud family sharing enabled, and dont want them brats (just kidding, mine are actually angels) to turn off the main water supply through HomeKit as a prank when you are showering - this is for you! Set valve_control to false, and the plugin will ignore all valve control requests :-)


    Export historical sensor data for temperature and humidity to HomeKit using the proprietary Elgato Eve protocol. This feature will only be available from the Eve app, and will not display anything in the default Home app.

    Obtaining a refresh token


    Actually obtaining a refresh token from the GROHE ONDUS Api requires some manual steps. In order to more deeply understand what is happening during the process, you can read more information about the OAuth2/OIDC (OpenID Connect) login flow by searching for these terms in your favorite search engine. Here is a short step-by-step guide on how to obtain a refresh token:

    1. Open a new tab in your Internet browser
    2. Open the developer console of your browser (mostly possible by pressing F12)
    3. Select the network tab of the developer console (which shows you the network request done by the browser)
    4. Open the following URL:
    5. You will automatically being redirected to the GROHE ONDUS login page, login there
    6. After logging in successfully, nothing should happen, except a failed request to a page starting with token?
    7. Click on this request (the URL in the request overview should start with ondus:// or something like that
    8. Copy the whole request URL (which should contain a lot of stuff, like a state parameter and so on)
    9. Open a new tab in your Internet browser and paste the URL into the address bar (do not hit ENTER or start the navigation to this page, yet)
    10. Replace the ondus:// part of the URL with https:// and hit ENTER
    11. The response of the page should be plain text with a so called JSON object. Somewhere in the text should be a refresh_token string, select the string after this refresh_token text, which is encapsulated with ".

    E.g.: If the response of the page looks like this:

        "access_token": "the_access_token",

    Then the refresh_token value you should copy would be: the_refresh_token. This value is the refresh token you should save as described above.

    Testing unreleased versions on your homebridge setup

    1. git clone
    2. cd homebridge-grohe-sense
    3. npm install
    4. npm run build
    5. npm link
    6. homebridge -I -D

    Why did I do this

    If you really want to know this, lets take a stroll down memory lane:

    1. is AWESOME! Props to everyone who contributed
    2. I couldnt find a Ondus Sense plugin for homebridge :-(
    3. I configured OpenHab with FlorianSW
    4. I made Homebridge talk to OpenHab
    5. 4 kinda worked, but data were never refreshed
    6. Concluded OpenHab sucks (just kidding)
    7. Started looking at and wondered how hard can it be?
    8. Looked at FlorianSW java code alot for figuring out the Ondus web API
    9. Spent 3 days trying to understand how 3 gazillion Node.js HTTP frameworks worked, and they all suck (just kidding.. well, not really) I mean... wtf... Seriosly, what is wrong with you guys??
    10. Found which was supercool
    11. Attempted to get OpenHab working again, and it still sucks - especially when I dont want it to consume my life
    12. Found homebridge example plugin
    13. Got example up and running
    14. Played around using TypeScript. Do I like it? Its growing - still wish it was Python, because I have trouble expressing everything I want
    15. Found more help on Ondus API from - cool shit and written in a proper language :-)
    16. Managed to piece together something bridging the example plugin framework with my superagent code from 10 worthy of showing the world
    17. Had lots of fun learning new shit
    18. Currently waiting for contributions or law suite from Grohe


    npm i homebridge-grohe-sense

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