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Has anyone made a homemade rain sensor with a...
Has anyone made a homemade rain sensor with a rain sensor pad tied into a smart things moisture sensor?
+7
votes
asked
Apr 23, 2020
by
apprehensible
(
4.9k
points)
Has anyone made a homemade rain sensor with a rain sensor pad tied into a smart things moisture sensor? I think it would be cool to have Alexa announce when it started to rain, though would have to turn it off some how so it wouldn’t go off I. The middle of the night. Right now I have dog beds outside drying and it might rain this afternoon so I keep watching the windows like a hawk.
sensor
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4
Answers
+5
votes
answered
Apr 23, 2020
by
avitzur
(
6.1k
points)
Best answer
Could just put a water/leak sensor outside when you want notices like now with something drying outside. ♂️. The Samsung ones have water sensors on the top and bottom of the device. That’s my down and dirty simple easy $20 idea
Show 8 previous comments
commented
Apr 24, 2020
by
variola0
(
8.6k
points)
@
balk
It will in a polluted environment, like a city. In a clean one it is definitely pure and non-conductive. Rain water that has run off a roof will be full of stuff that has collected on the roof over time.
commented
Apr 24, 2020
by
balk
(
5.2k
points)
@
variola0
rain needs dust particles to form. They condensate around them. More condensate than the weight of natural air current make rain. Only way to get pure water is distillation.
commented
Apr 24, 2020
by
balk
(
5.2k
points)
To have perfect rain would be nearly impossible. Dust from the country or pollution from the city. Perhaps in the middle of the pacific the dust particles would be so minimal that it could be neglected - even the pollution in LA is from China so there's that.
commented
Apr 24, 2020
by
variola0
(
8.6k
points)
@
balk
Yes but it’s not black or white. It’s a grey scale. Relatively, rain water is very pure. Not 100% but very close in a clean environment. I tried using moisture sensors to detect rainwater harvesting into a tank. Initially they detected water running but once the crud had washed through and off the roof, the sensors stopped detecting. I developed my own moisture/flood sensor and it’s very sensitive but won’t work with distilled water or ‘clean’ rain water. It just doesn’t conduct well enough.
commented
Apr 24, 2020
by
balk
(
5.2k
points)
@
variola0
sure you need higher volts and a small leak sensor won't provide that. You could get a wireless tank level to detect changes.
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+4
votes
answered
Apr 23, 2020
by
tamarau15972
(
1.4k
points)
My velux has such a sensor but no idea how to get the info. By the way if someone knows look forward to know how
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+4
votes
answered
Apr 23, 2020
by
variola0
(
8.6k
points)
My smart home does this. You have to be careful as it could get very annoying very quickly. It only announces it if it hasn’t rained for 24 hours but I get notifications otherwise. I tried loads of sensors and found optical one works best.
https://smartisant.com/research/sen...n.php
commented
Apr 23, 2020
by
apprehensible
(
4.9k
points)
@
variola0
is it possible to tie that into something to get notifications, like a smart things sensor?
commented
Apr 23, 2020
by
variola0
(
8.6k
points)
@
apprehensible
It’s 12V dc with switched output. It could be done using relay or opto-coupler.
commented
Apr 24, 2020
by
filterable80790
(
110
points)
Rob, do you have an Arduino sketch for the Hydreon - I don't particularly want to re-invent a wheel :-)
commented
Apr 24, 2020
by
variola0
(
8.6k
points)
In terms of Arduino code, it will simply pull the input pin high or low using the on-board relay. Depends on if you use normal-low or normal-high input. Email/messenger me if you need more specific help or sample code. The biggest challenge is going to be interfacing to your particular smart home control system.
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+3
votes
answered
Apr 23, 2020
by
lona639
(
1.2k
points)
I use Dark Skies app, so not an automation. It notifies your cell right before any precipitation including rain, snow, sleet. Always accurate, but again not a smart appliance.
commented
Apr 23, 2020
by
apprehensible
(
4.9k
points)
@
lona639
that could work. I’ll check it out, thanks
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