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espeasy to active pump when open tap
Posted: 02 Oct 2018, 15:28
by megamarco83
hi, i have a bathroom on 2nd floor and i have the heater of hot water on graund floor, so when i open the tap at 2nd floor it required many times to become hot. I solve the issue using a pump, connected to Sonoff with EspEasy. So when i need hot water i switch on the pump using domoticz
now i would like to have it automatically, so when i open the tap and the water flow, the pump should recognize it and turn on automatically.
what sensor i could use that is compatible with ESP ?
thanks
p.s. the best is use something that avoid to cut pipes, insert something and join again the pipe
Re: espeasy to active pump when open tap
Posted: 02 Oct 2018, 19:55
by Shardan
Hello,
if there is some water running at all without the pump running a flow sensor might be possible.
As soon as water starts running the sensor gives pulses which can be used to trigger the pump.
Another possibility might be a pressure sensor near the tap but that will definitely come with
a lot of calibration problems. It should be a sensor with analog or switch output in that case
to get it connected to the ESP.
Re: espeasy to active pump when open tap
Posted: 04 Oct 2018, 11:22
by megamarco83
Shardan wrote: ↑02 Oct 2018, 19:55
Hello,
if there is some water running at all without the pump running a flow sensor might be possible.
As soon as water starts running the sensor gives pulses which can be used to trigger the pump.
hi thanks for answering
for sure i prefere this solution, something like this?
https://www.aliexpress.com/item/1PCS-Wa ... ad581d70-0
but i need to interrupt my circuit, correct?
i would like to avoid that, and maybe using something to apply external to the pipe, is it possible?
Re: espeasy to active pump when open tap
Posted: 04 Oct 2018, 11:41
by Reefie
Re: espeasy to active pump when open tap
Posted: 04 Oct 2018, 15:34
by Shardan
Sure you have to interrupt your circuit, but this sensor can be placed anywhere so mounting it on top of the pump might be easy.
If you get to a flow of at least 3l/min without pump this sensor works too, yep.
Re: espeasy to active pump when open tap
Posted: 04 Oct 2018, 15:39
by megamarco83
interesting!
but there isn't anything similar but cheaper?
thanks
Re: espeasy to active pump when open tap
Posted: 04 Oct 2018, 16:14
by HomeJCL
Try to Figure cost of cutting and interfacing the flowmeter from Ali, and then I don’t speak of possible failure/leakage.
I admit, don’t like invasive measurements when not needed or an alternative exists.
Wet dream of engineer everything non invasive
Re: espeasy to active pump when open tap
Posted: 04 Oct 2018, 16:18
by Shardan
Searched a while, but didn't find any...
As 3l/min is a lot of water I doubt if you get that without pump already running.
Flow sensor might be better way.
Re: espeasy to active pump when open tap
Posted: 04 Oct 2018, 23:40
by megamarco83
HomeJCL wrote: ↑04 Oct 2018, 16:14
Try to Figure cost of cutting and interfacing the flowmeter from Ali, and then I don’t speak of possible failure/leakage.
I admit, don’t like invasive measurements when not needed or an alternative exists.
Wet dream of engineer everything non invasive
yes i agree, but i need something that is more "sensitive" because your suggested sensor required 3l/min....that are to much to activate the pump? correct?
Re: espeasy to active pump when open tap
Posted: 05 Oct 2018, 09:45
by HomeJCL
Forget the FS-10 you also need to cut the pipe, it is not a clamp on solution but a pipe to install.
Sorry I assumed it was a clamp on, so the AliX meter is a lot cheaper then
Re: espeasy to active pump when open tap
Posted: 06 Oct 2018, 10:32
by Domosapiens
My suggestion: enlarge the solution space.
- Think of presence detection in front of the tap
- Think of flow detection in the sink
The pump will run a few times to many, but no big deal in my opinion.
Re: espeasy to active pump when open tap
Posted: 08 Oct 2018, 09:00
by megamarco83
Domosapiens wrote: ↑06 Oct 2018, 10:32
My suggestion:
enlarge the solution space.
- Think of presence detection in front of the tap
- Think of flow detection in the sink
The pump will run a few times to many, but no big deal in my opinion.
yes, good suggestions, but what kind of sensor i could use to perform that?
Re: espeasy to active pump when open tap
Posted: 08 Oct 2018, 09:12
by Domosapiens
Re: espeasy to active pump when open tap
Posted: 08 Oct 2018, 09:24
by wernieman
Or you can use a switch on den door to the bathroom. Normaly, when somebody go in the bathroom, he/she would use Water.
I don't know your tap, but you could use a switch to. When you "turn on" the hot water ....
Only a little "brainstorming"
Re: espeasy to active pump when open tap
Posted: 08 Oct 2018, 13:50
by Shardan
PIR isn't a good idea as they detect moving temperature differences with "zones".
Moving fingers while washing hands won't be enough most likely.
Same for radar detectors.
Ultrasonic sounds like a good idea to me.
LisaM had a modified plugin for sensors beside HC-SR04, some water resistent versions might exist...
I don't know if any of the code made it into ESPEasy Mega.
Another idea might be an active infrared sensor instead of the passive PIR.
A well known manufacturer is "Grohe" in Germany.
- 36236001.jpg (6.03 KiB) Viewed 10576 times
The infrared light barrier (Sender & receiver) resides inside the tap's socket behind the dark oval.
Should be possible to make something similiar.