I’m concidering to buy a GROHE Sense watersensor. Together with the Grohe Ondus App it promises to track temperature and send alarm push notifications when detecting water. Is anyone aware of a binding which would support this sensor in OH2?
Link: https://www.grohe.de/de_de/smarthome/grohe-sense
No, and I doubt there will ever be one.
But there’s a couple of alternatives such as the Fibaro FGFS flood sensor. That one uses ZWave, so it’s easily integrated in OH.
I think this product uses a ti cc chip or a ESP! It has to have an integrated server that sends http messages over wi-fi! Using wire shark you can capture those and then probably you can use one of the generic bindings in openHAB (http, TCP/IP, or mqtt) to link items to the device.
It’s not impossible, for sure!
Thanks for the idea to use wireshark. Maybe it’s time to gather some experience with this tool.
But for now I switched to the sensor from d-link http://www.dlink.com/de/de/products/dch-s160-mydlink-home-water-sensor , hoping I can use or adapt the existing binding for d-link (even though it’s currently listed as being compatible to only the motion-sensor).
So, together with a friend, who buyed the sense guard, I looked at the app and implemented a consumer of the underlying REST api for java. Out of that, we built a binding for openHAB, which covers the most basic operations for now. You can find the pull request on github. Feedback would be very appreciated 
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I’m renovating my house and always progressively prefering OpenHAB compatible hardware, so I’m really glad to see you’ve had a go at a binding for this Grohe gear.
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Hi Florian
Just tried your binding with a SENSE device and I get this:
==> /var/log/openhab2/openhab.log <==
2018-09-08 18:20:37.871 [ERROR] [nal.common.AbstractInvocationHandler] - An error occurred while calling method 'ThingHandler.initialize()' on 'org.openhab.binding.groheondus.internal.handler.GroheOndusApplianceHandler@42f78543': null
java.lang.NullPointerException: null
at org.openhab.binding.groheondus.internal.handler.GroheOndusApplianceHandler.getPollingInterval(GroheOndusApplianceHandler.java:120) [253:org.openhab.binding.groheondus:2.4.0.201809071759]
at org.openhab.binding.groheondus.internal.handler.GroheOndusApplianceHandler.initialize(GroheOndusApplianceHandler.java:75) [253:org.openhab.binding.groheondus:2.4.0.201809071759]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:?]
at org.eclipse.smarthome.core.internal.common.AbstractInvocationHandler.invokeDirect(AbstractInvocationHandler.java:153) [94:org.eclipse.smarthome.core:0.10.0.oh240M2]
at org.eclipse.smarthome.core.internal.common.Invocation.call(Invocation.java:53) [94:org.eclipse.smarthome.core:0.10.0.oh240M2]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:?]
at java.lang.Thread.run(Thread.java:748) [?:?]
==> /var/log/openhab2/events.log <==
2018-09-08 18:20:37.880 [hingStatusInfoChangedEvent] - 'groheondus:appliance:c4a2ccb4-0906-4470-b021-c8ee0ace85e7' changed from INITIALIZING to UNINITIALIZED (HANDLER_INITIALIZING_ERROR)
==> /var/log/openhab2/openhab.log <==
2018-09-08 18:20:37.881 [ERROR] [ome.core.thing.internal.ThingManager] - Exception occurred while initializing handler of thing 'groheondus:appliance:c4a2ccb4-0906-4470-b021-c8ee0ace85e7': null
java.lang.NullPointerException: null
at org.openhab.binding.groheondus.internal.handler.GroheOndusApplianceHandler.getPollingInterval(GroheOndusApplianceHandler.java:120) [253:org.openhab.binding.groheondus:2.4.0.201809071759]
at org.openhab.binding.groheondus.internal.handler.GroheOndusApplianceHandler.initialize(GroheOndusApplianceHandler.java:75) [253:org.openhab.binding.groheondus:2.4.0.201809071759]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:?]
at org.eclipse.smarthome.core.internal.common.AbstractInvocationHandler.invokeDirect(AbstractInvocationHandler.java:153) [94:org.eclipse.smarthome.core:0.10.0.oh240M2]
at org.eclipse.smarthome.core.internal.common.Invocation.call(Invocation.java:53) [94:org.eclipse.smarthome.core:0.10.0.oh240M2]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:?]
at java.lang.Thread.run(Thread.java:748) [?:?]
The Thing remains uninitialized and there is no channel for flood/water
I would be happy to send you the device for testing
Vincent
Hi all!
Thanks for testing this binding with a SENSE device, unfortunately it seems to does not work out of the box 
@vzorglub already created an issue in github and I answered there:
https://github.com/openhab/openhab2-addons/issues/3898
For the initialization error see this issue:
https://github.com/openhab/openhab2-addons/issues/3899
Best,
Florian
Hi there,
is the binding working ?
I have troubles and created Issues:
[groheondus] adding Sense Guard - remains Uninitialized
[groheondus] Installation failed with 404 when using username / password
Really really want to have that water-flow in openhab, because my motion sensors cannot see in my shower 
best regards
PhiL
Hi @papaPhiL,
sorry that I didn’t answe faster here, it were some busy days
I looked into your issues and commented there, would be great if you could take a look and respond there as well, so we can move forward and see what we can improve here
Best,
Florian
Hi Florian, did you been successful to connect to OpenTable the Grohe sense? I want to buy one.
Saw that it is now compatible to Telekom Smart Home. But how this works I did not know.
Thx