# Shower sensor that lets me know when the shower goes on AND off (repeat) **URL:** \ **Category:** Questions & Help\ **Tags:** homey-pro\ **Created:** [November 27, 2024, 7:38pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857 "2024-11-27T19:38:10Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Frans-Jan\_Copini](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/frans-jan_copini/32/113398_2.png) [@Frans-Jan\_Copini](https://community.homey.app/u/Frans-Jan_Copini)\ **Post date:** [November 27, 2024, 7:38pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/1 "2024-11-27T19:38:10Z")
What i want is to connect a light in my 2 bathrooms to show that the other shower is on. The implication being that the other shower should stay OFF. Both running at the same time results in a very poor stream of water. I’ve seen posts that say humidity sensor should dp the trick, but I need it to react fast on both sides as the morning routine changes often but it can happend that both bathrooms go on and off within minuites in between and i don;t want anyone to wait longer then needed. (oh and i don’t want to cut in my pipes to insert a sensor that can tell me warm water is flowing) ---
**Author:** ![FKey](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/fkey/32/14793_2.png) [@FKey](https://community.homey.app/u/FKey)\ **Post date:** [November 27, 2024, 8:07pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/2 "2024-11-27T20:07:17Z")
Wild idea: Use a rain sensor like [this one](https://community.homey.app/t/home-made-rain-sensor-idea/29117) It seems to react fast. If the print is heated (I have seen versions with a heatied print) will evaporate the water quick, not sure if that is fast enough ---
**Author:** ![JohanP](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/johanp/32/119002_2.png) [@JohanP](https://community.homey.app/u/JohanP)\ **Post date:** [November 27, 2024, 8:54pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/4 "2024-11-27T20:54:00Z")
How about a flowsensor between tap and hose, or between hoze and showerhead ? You wouldn’t have to cut into pipes. Or maybe there is a flow- or even a heatsensor you can clamp onto a pipe ? ---
**Author:** ![Frans-Jan\_Copini](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/frans-jan_copini/32/113398_2.png) [@Frans-Jan\_Copini](https://community.homey.app/u/Frans-Jan_Copini)\ **Post date:** [November 27, 2024, 8:57pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/5 "2024-11-27T20:57:17Z")
It’s a rain shower, so the hose is inside a metal tube and inside the wall… but the heat sensor might be promising ---
**Author:** ![FKey](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/fkey/32/14793_2.png) [@FKey](https://community.homey.app/u/FKey)\ **Post date:** [November 27, 2024, 9:02pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/7 "2024-11-27T21:02:41Z")
Looks like the “shower stopped” will be the hardest one: Humidity decreases slowly Wet rainsensors dries slowly A hot tap with warm water in it cools down slowly Water sensor in the drain (probably too big) Curious how it will work out ---
**Author:** ![JohanP](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/johanp/32/119002_2.png) [@JohanP](https://community.homey.app/u/JohanP)\ **Post date:** [November 27, 2024, 9:19pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/8 "2024-11-27T21:19:09Z")
Let’s approach it from the other side. If the shower is running you’re using hot water, right ? Can you detect if the heater is running or your boiler is providing water ? You don’t need to do it in one of the showers, you just want to know if any of the showers is running. So a flowsensor on the boilerside might be an option ? I would even guess this goes for hot water from the kichentap also ? ---
**Author:** ![Gruijter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/gruijter/32/1973_2.png) [@Gruijter](https://community.homey.app/u/Gruijter)\ **Post date:** [November 27, 2024, 9:30pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/9 "2024-11-27T21:30:01Z")
If your hot water boiler is opentherm compatible, you can use this. Been using it myself for over a year to detect showering and to control the bathroom lights and water temperature when showering takes too long 😉 > [@\[APP\]\[Pro\] OpenTherm GateWay MQTT](https://community.homey.app/t/app-pro-opentherm-gateway-mqtt/77190): > > Homey App Store (stable version): Homey App Store (test version): [OpenTherm Gateway MQTT App for Homey | Homey](https://homey.app/en-us/app/com.gruijter.otgw/test) There already was an app for OpenTherm GateWay, OTGW for short (many thanks for your work @nlrb !): [OpenTherm Gateway App for Homey | Homey](https://homey.app/en-us/app/com.tclcode.otgw/OpenTherm-Gateway/) I tried to install it on my new Homey Pro 2023, but that was a no-go. Installing on my older Homey did work, but the connection was somewhat unstable, and the functionality was too heavy for my application. HP2023 and MQTT support I found out … ---
**Author:** ![JohanP](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/johanp/32/119002_2.png) [@JohanP](https://community.homey.app/u/JohanP)\ **Post date:** [November 27, 2024, 9:42pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/10 "2024-11-27T21:42:25Z")
@Gruijter : good call, didn’t think of opentherm… ---
**Author:** ![Frans-Jan\_Copini](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/frans-jan_copini/32/113398_2.png) [@Frans-Jan\_Copini](https://community.homey.app/u/Frans-Jan_Copini)\ **Post date:** [November 27, 2024, 9:43pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/11 "2024-11-27T21:43:40Z")
Don’t have a boiler as we are connected to the city heating system ( hot water comes from outside ) but still… I should be able to see if the hot water is running. But not sure how to “sense” the hot water is flowing ---
**Author:** ![JohanP](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/johanp/32/119002_2.png) [@JohanP](https://community.homey.app/u/JohanP)\ **Post date:** [November 27, 2024, 9:47pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/12 "2024-11-27T21:47:55Z")
Any meter or whatever for the hot water. How is this connected versus the heating of your house ? Heat exchanger ? ---
**Author:** ![Frans-Jan\_Copini](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/frans-jan_copini/32/113398_2.png) [@Frans-Jan\_Copini](https://community.homey.app/u/Frans-Jan_Copini)\ **Post date:** [November 27, 2024, 9:50pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/13 "2024-11-27T21:50:23Z")
![IMG_5108](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/c/2/c2ac4c2b0df60f31782b176bd65faefccc8463d6.jpeg) ---
**Author:** ![Frans-Jan\_Copini](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/frans-jan_copini/32/113398_2.png) [@Frans-Jan\_Copini](https://community.homey.app/u/Frans-Jan_Copini)\ **Post date:** [November 27, 2024, 9:51pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/14 "2024-11-27T21:51:28Z")
There’s a box from the hot water provider aswell… apparently they are able to read the data from their box… ---
**Author:** ![Frans-Jan\_Copini](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/frans-jan_copini/32/113398_2.png) [@Frans-Jan\_Copini](https://community.homey.app/u/Frans-Jan_Copini)\ **Post date:** [November 27, 2024, 9:55pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/15 "2024-11-27T21:55:14Z")
This is amazing! Whish I had a boiler now 😂 ---
**Author:** ![Frans-Jan\_Copini](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/frans-jan_copini/32/113398_2.png) [@Frans-Jan\_Copini](https://community.homey.app/u/Frans-Jan_Copini)\ **Post date:** [November 27, 2024, 9:58pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/16 "2024-11-27T21:58:38Z")
I do seem to have a smart water module! Didn’t know > **[De slimme warmtemodule | Eneco](https://www.eneco.nl/duurzame-energie/warmte-koeling/slimme-warmtemodule/)** > > Met de slimme warmtemodule wordt je warmtemeter slim, en heb je meer inzicht in je warmteverbruik. Lees er alles over. Might be able to get info from there ---
**Author:** ![Frans-Jan\_Copini](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/frans-jan_copini/32/113398_2.png) [@Frans-Jan\_Copini](https://community.homey.app/u/Frans-Jan_Copini)\ **Post date:** [November 27, 2024, 10:05pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/17 "2024-11-27T22:05:12Z")
No… it can read it every 15 min… that’s not fast enough ---
**Author:** ![CoonHouse](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/coonhouse/32/2764_2.png) [@CoonHouse](https://community.homey.app/u/CoonHouse)\ **Post date:** [November 27, 2024, 11:40pm UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/18 "2024-11-27T23:40:30Z")
Maybe something like this: [https://a.aliexpress.com/\_EGxoiti](https://a.aliexpress.com/_EGxoiti) ---
**Author:** ![JohanP](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/johanp/32/119002_2.png) [@JohanP](https://community.homey.app/u/JohanP)\ **Post date:** [November 28, 2024, 5:45am UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/19 "2024-11-28T05:45:42Z")
That doesn’t help indeed. I think you’ll get back to one solid solution. If you want to know if water is running, you do need a flowmeter. But you could fit one in the kabinet instead of in the shower. It’ll look beter thdn in the shower and you’ll need only one instead of two… ---
**Author:** ![Cuprum](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/cuprum/32/41409_2.png) [@Cuprum](https://community.homey.app/u/Cuprum)\ **Post date:** [November 28, 2024, 6:46am UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/21 "2024-11-28T06:46:38Z")
In my installation i’m using a [leakage sensor](https://www.fibaro.com/en/products/flood-sensor/) to switch on ventilation in bathroom. Working well and without problems, when double-side taped on wall, near floor behind the shower. Not immediate reaction time ( requires someone is spreading water flow from shower/tap ) - but also does not gives false positives, when someone is just taking the water from tap. ![IMG_20241128_084136](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/d/5/d5f33589a94992fc2740a8a7b4f259f6d42ccd7c.jpeg) ---
**Author:** ![Frans-Jan\_Copini](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/frans-jan_copini/32/113398_2.png) [@Frans-Jan\_Copini](https://community.homey.app/u/Frans-Jan_Copini)\ **Post date:** [November 28, 2024, 7:03am UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/22 "2024-11-28T07:03:52Z")
Yes this seems to work great for knowing the shower is on. But I heard the drying part( knowing the shower is off) takes a long time ---
**Author:** ![Anders\_Gregow](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/anders_gregow/32/61721_2.png) [@Anders\_Gregow](https://community.homey.app/u/Anders_Gregow)\ **Post date:** [November 28, 2024, 7:26am UTC](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857/23 "2024-11-28T07:26:41Z")
How about a sensor detecting that the shower knob is turned? Use something like this to detect when the water is turned on/off: [https://www.kjell.com/se/produkter/el-verktyg/elektronik/elektromekanik/strombrytare-for-elektronik/mikrobrytare/mikrobrytare-extra-liten-p36054](https://www.kjell.com/se/produkter/el-verktyg/elektronik/elektromekanik/strombrytare-for-elektronik/mikrobrytare/mikrobrytare-extra-liten-p36054) [Next page](https://community.homey.app/t/shower-sensor-that-lets-me-know-when-the-shower-goes-on-and-off-repeat/121857.md?page=2)