Moin, hello and welcome! I’m the
fat Dirk and today I’ll show you in 3 steps how we build a wireless
water sensor for Homematic! Why build radio-water sensor? Is there already!
Right! You’re right! There are already! But ours is first cheaper,
secondly small and third often can be used and I’ll show you now!
Here we go! So, what do we need to do this? Once the wireless window contact. Danger:
magnetic, not optical! Magnetic! And of course, a water sensor or
liquid sensor and next to the two Of course, everything else that is on the
back of the table! Well, in the background it works! You see: it worked!
But I’ll show you now how we go there come!
Let’s start with step 1: We pack turn off the wireless sensor and connect
it to the homematic, so study it. Here we go! Unpack the wireless window
contact and teach it to the Homematic. So, as always, we’ll cut the seal here.
Window contact, User manual, the electronics, a
lot of accessories, including two Batteries, a lot of screws and here
is the magnetic contact. All that we do not need, because today we hack
hardware! But what we need are the ones both batteries! Come on…
Oh well, extra welded. So, the two Batteries.
Now we open the case in the we, I’ll show it again: I do not know, if
you can see: This little nose in the back bend backwards and push
the whole thing upwards. This is the holder.
That’s the case. The batteries, you can see it in the case, come in with the positive pole down.
So, housing flashes, so has Electricity. Now and you already
know from various other videos, put we are ready to teach our Homematic!
Now we are on our homematic Home and I just show just briefly,
how to do with the learning: You Click on “Teach-in devices”, then
the device-learning-page “and then on “Hm teach device”. Time is
running, we have 60 seconds to get to the small button to press! It continues here!
The time is running! The learning button at the wireless window contact this little
one is here and there I press briefly now on it and then you see how the lamp
flashes here. This would mean that the learning process already be to the end. Next
it goes back to the computer! The training process is now complete and
you see here in the inbox the 1. Our device is recognized! Go on!
Off to the inbox! Click! Inbox has opened.
Here he is: hm… and so on door-window contact, serial
number and… you know everything already, I have already shown you in
various other videos. What we here just do it: We go to
settings and, now super important, we take
the sabotage message here out because, we’ll be getting our radio
Sabotage window contact! Put the maximum send attempts to 10 and do
this below too! Send attempts on 10 set. Messages position
closed is ok! report open is also okay! We can do everything
that far! We can do that now confirm with OK. That transfer has
not worked now because we first once briefly press the button in
the window contact, so that the Data can be transferred.
And we do that now! Then just click on “recheck”
and schwupp: are the dates transfer!
There is the receipt! All good! So, then we are in the inbox again and
can now click on “ready”. This will make the device disappear, as
you already know, from the inbox. I do a bit faster here and then we
go to “devices” so that we can Device can now adjust. There it is!
We now give it a name! Double-click, no, just click
also and we call it “test Water alarm. “Is this correct?
“Test water alarm” Confirm with ok and also the switching channel down here
we just call “test water alarm” and confirm with ok. So thats it!
We would have this part then completed. The wireless window contact
is now taught to the Homematic! Step 1: Done! Now comes Step 2:
The hardware hack! I’m looking forward!! And because which is now a pretty
fumbling, we have two cameras work. First of all, get some batteries out!
Stayed here! Whoosh! Then, wrong Screwdriver, remove this screw. Done!
Nice to be nearby, because Screws we have a habit
of running away! Take out this cover and this is
the heart of the whole thing: Here we have our button on which
we just pressed on it a few times. This is the switch, the magnetic
switch and these two places, they interest us! Here we
are building the bridge! We do the following: We twist the
wires a bit. By the way: That Whole is verpolungstechnisch completely
uninteresting. It is only possible tiny little streams through these
cables, namely what the two batteries deliver.
So, let’s see if I can reasonably. Let’s push this
cable, the dark, down here, alas, Let’s get going… So it’s important that
no cable gets loose here and his own Way goes. Then we push that
down here, so, flip it on Finish up and twist the whole thing. Number 1 attached without soldering!
Of course you can also solder it! I do not have to go here now. Second
pass: This cable to this contact Push through. Why am I doing this
from this page? Going again… Why am I doing this from the side?
So we equal the insulation on the Have switch contacts. As you can see, it is no shame if it
does not work the first time. I have to say:
This does not work the first time! 🙂 Electric wire pull through, bend up and twist. Done! So we have now bridged
the internal switch! Can that make it a bit nicer here again.
So, now it is here again continue! The other end of the cable
there, maybe twisting, then go it a little bit better!
By the way, twisting is also one approved connection technology. So we do
not necessarily mess around here, we do Just make it a little easier. Here through,
the above, then the lid on it again! Make sure that, at the back the
battery contact is correct Lid is on it and screw it again.
So, batteries back in. Lights on – all right!
And to test if it still works works, now we just do the
following: Here you can see that Light, if I do not keep my fat fingers out
of the way. So, as soon as we have this two cables, if I can still get into this
little camera, as soon as we have this hold small cable together, the
switch is virtually closed, there it a contact! Then connect the sensor. Stripping again, not short
but fast, sometimes even so to speak 1 2 Twist, twist here too and
connect here accordingly. Of course, if you then make it stationary
afterwards and use it properly, Doing it properly and not like now.
But this is just about, too show how it’s done. How to connect
cables with a luster terminal, you will surely know yourself. So, finished!
So our contact is also connected! Again on the computer!
We have to write a program for that also what happens if we have the
contact here! So it’s over, back to the computer and we are back on
our homepage. Now we have to enter Write a program. And I would
like to thank our friend sonoff Switch, I’ll link the video up here,
where we put it in the Homematic have a lamp turns on as soon as the
water sensor, water sensor feels water. So: programs – new! This program
we also call “test water alarm” Short description: Indicates alarm
when the water sensor registers water. OK! Condition: if our equipment selection,
and this time we are looking for our window contact, because: We do not recognize the water sensor. We had him… there he is test water alarm.
“So” test water alarm “when” closed “, namely when the two snores detect
water, “triggering change” right, then and now there is our
device, namely the Sonoff button and his name was “Led”. Maybe you
know that from the last video: We called that “Led” and it was the
button number 1 and it is here not in the list because he has a different
name and that’s why we need one scroll a bit. So, here is the “Led
Button channel “light”! We take it! Otherwise “Immediately” and “keystrokes long” was
to turn on the light. So: “conditions” if “device selection” “test water alarm”
on “closed” “trigger on change” then send “device selection” of our LED
switches immediately “key press long” our sonoff switch. “Otherwise” we take again our equipment
selection, we take again now our sonoff switch. See if you can find
that faster when you’re on the back peeps? There he is! “Short press”,
then we switch off again! The Save whole with ok! OK! Let’s see if our program is there.
Water alarm gives alarm if the, there is still missing a “T”, no matter, water
sensor registered water. It’s there, it’s done! Continue let’s go: the big test!
Oh, wait: Service message! The configuration data are still available
for transmission! So we have to go our little button at the window
Click radio contact so that the Configuration data are transmitted.
Schwuppdi! Is finished and now comes the exciting moment where we
look, whether it works or not! Stay get started, go! So there we are again at the
table! We have to go to the small button Press to transfer the data.
Press briefly. As you can see: lights on, data will
be transferred! So and now comes the exciting moment! This is a container…
you can not see… … let’s see if things are better…
Let’s search together: That not at the moment, nor that,
not even, but our son- Switch, lamp, container
of tap water, our radio Window contact and our probe.
Attention: it will be exciting! Light on and Is back out! Seen? Again from the side: Attention! Sensor into the water! Light on! Sensor off the water: light off again! Cool thing! Is working! We would have a reasonably cheap!
The thing costs, I think, no 25 euros, the costs no 11 euros. So we are
with 36 euros at a water-switch. But there’s a little trick: this is osmosis water and here the following happens: nothing! That’s stupid now! Because the water has a certain conductivity must have and here we come
to the conductivity meter. This is the conductivity meter. I’ll set
that up just to see if you can do that the camera sees: Yes! Our osmosis water has a conductivity of 15! This is rather clear and is not
enough to our water sensor trigger!
Our tap water… you can see… you can definitely see… has
a Leitwert of 662… hope, you can really see it, right?…
that’s just too much 662 we have to… now you have to
believe me… 662 and is enough to the Trigger sensor. Well, now
we have to find out, From which conductivity does the sensor
trigger? Let’s do a try… can you do that see again? I hope…
So: we are now dumping water from Tap water to osmosis water to see
from which conductivity the sensor because triggers…. That was at 60, right?
Let’s take another look in slow motion! That is: starting at a conductance of 60,
and that is very very low, that solves the water sensor off! I’m still fascinated! 🙂 Triggers the water sensor and that works the whole thing! Wonderful! What I just wanted to say
briefly: Of course I link everything to you, what we use, so the wireless window contact and the measuring sensor in the video description. And the genius
of this solution is yes: That you instead of the water sensor
also any other x-arbitrary, but potential-free, that means without
electricity, switch can connect! Thank you for staying tuned!
So we saw how to do that Wireless window contact integrated into
the Homematic. How to use that one connect to another sensor or switch.
We saw how the Liquid or water sensor turns
the lamp on and off. We have determined, from which
Leitwert he does that. I think we made a lot today!
If you liked it, would I look forward to a thumbs up!
If you do not want to miss anything and not just subscribed, would be a good opportunity
now, because the video is indeed right to the end.
And otherwise I would say: many Thanks for watching, thank you for
your time! Moin, bye and see you soon!