I just wonder is someone ever has connected to Geberit Duo Fresh control Panel (this is a Toilet Flush with integrated sensor) using Bluetooth.
Reason is that i like to access the sensor and start the ventilation in the Restroom. So if someone sits down on the Toilette the Fan starts.
The Sensor works very well so it would be cool to automate this.
Only other way I could think of is using a Shelly uni and use the 12 V switch of the Sensor to activate the Fan. But I do not want to cut the Cable and lose warranty
I found that Geberit has created a Gateway - well it costs 2.500 Euro what is a little bit to much for me.
They are using a bus system called „GEBUS“
My original idea to just cut the cable that comes from the sensor and goes to the fan using a Shelly uni is not possible in that case.
They use a 4 pin Bus system. So I can not hack the hardware and even not the proprietary Bluetooth integration.
Just another company that tries to crate closed environments and selling expensive gateways.
Well, let us assume you have the geberit App installed. Is there a counter incrementing with each usage? Additional, you can enable the adb Debugging on your phone and load this into
Wireshark… There are some guides on yt how to Do those works…
Maybe this way you can read out the times the Sensor started… A first start…
Not sure if you are still looking into it. But I started on it also. I think bluetooth integration would be the way to go. (Not sure the DuoFresh even has GEBUS) The trick is going to be understanding the bluetooth commands. They seem to have 2 ‘unknown’ servcies that are used by the app to communicate with the DuoFresh.
I am using nRF connect & logger to see if I can get some insights into it
Also interested into prospectively getting a duo fresh system but wondering if you made any progress figuring out the cable running to the extractor fan? One thought to avoid warranty issues - if the plug on that cable can be found, you could insert your own extension length between the fan cable and the sensor, and this length can be wired into a shelly uni.
Another idea: put a power meter to measure power going to the transformer. Presumably power would go up when fan is on. Spec sheet says 0.5w standby, 7w operating.
