I have a contactor that has an extra contact. What I want is when the relay is open the device would send a signal to HE. The exact oposite of a water sensor.
What is your question?
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Along the same line as @marktheknife 's question.... Perhaps you could provide information about your setup and device(s) involved...
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What device are you wanting to integrate with Hubitat (i.e. who are the manufacturer and what is the model).
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What driver have you or are you intending to use?
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What HE model and platform version are you using?
But ultimately the crux of what Mark was wanting to understand is what you are looking to achieve by integrating your device(s) with HE.
I may be misunderstanding, but using a leak sensor as a dry contact sensor provides you a binary output. It senses both open and closed, it is just how you interpret what it sends for state in your automations.
I would say the exact opposite is of leak sensor is a smart relay. Instead of sensing a contact open or closed, it changes a relay to open or closed. Do you really mean the exact opposite of a leak sensor? That doesn't make sense to me.
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I have an Ecolink flood sensor. I use it for a sump pump if it fails. I looked at the commands and it had What event do you want to monitor, Wet or Dry. I have a push notification. I changed it to Dry thinking it would be opposite and when dry HE would get a notification. I would be using this to monitor my hot tub so when the GFCI trips I would get a notification. I had setup a relay to trigger an alarm but it is too far away to hear. I know there are other ways like using ct's and Shelley EM but since I have HE and the spare contact on the relay I thought that the Ecolink
"When Dry" would sent the signal to HE and Pushover would alert my Iphone. Trying to keep it simple.
More information about how you have this automation set up would be great, as this is something coming from an app (how automation are created on the hub), not the device itself or the driver. It sounds like you're talking about the Notifications or Basic Rule app (only based on the pieces of your phrasing), but knowing more would be helpful. In general: if "dry" is the opposite of what you want, can't you just choose "wet" instead? But how you do so, or what you can do with the notification, depends on the app.
If I understand correctly, you have a contactor across the power connection to the hot tub. When the GFCI trips, the contactor will release and close the extra contact. You want to connect the Ecolink flood sensor to these contacts in order to get a notification to your Iphone.
If that is what you are looking for, then it is certainly possible. If you can confirm that this is what you are asking, I'm sure you will get many suggestions on how to accomplish your mission.
I think the OP may still need to take a step back and describe in more detail what devices are involved here and what they are looking to accomplish with Hubitat.
The word “contactor” will cause many people to assume this kind of device is in use:
I suspect that’s not at all what the OP meant given the follow-up post about a sump pump and water sensor.
Is a high-current device involved? That’s my understanding of what contactors are for.
Yes the contactor is a 50 am 240 volt. If you have an appliance like a hot tub you have to have a disconnected within 5 ft of the tub. Since the panel is one floor down and 30 ft away a contactor is needed. Presently, I have a wireless switch that controls a small relay which is connected to the coil of the contactor. I have another small relay that was used to control an alarm next to the panel but you can't hear it. The alarm rellay has an unused terminal and that is what I was trying to use a compatible HE device that would send a push notification to my Iphone. Ecolink DWZWAVE2.5‑ECO I believe as terminals that I can connect to. I would connect to the alarm relay and when that opens it would be the same as opening a door. I just found this today researching. I believe this would work.
I see. I missed the reference to your hot tub in a subsequent post.
Starting out with as much detail as possible will generally help avoid confusion.
You know your situation better than any of us so please consider that when creating a thread and its original post.
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Yes, if you are using an alarm device with a relay and an extra terminal, you can use a z-wave contact sensor with screw terminals for external inputs like the ecolink device you mentioned to send that signal to Hubitat.
The presence of the contactor is immaterial for this use case, AFAICT.
As long as the relay contacts do not have voltage on them (i.e. they are "Dry" contacts), then you can connect them to the contacts of a water sensor, or the external contacts of a door/window contact sensor.
The drivers for a water sensor will report the sensor is either wet or dry. The door/window sensor will report the sensor is either open or closed.
You will create a rule in Hubitat with a trigger which best suits the sensor you are using. For example if you are using the water sensor your trigger would be "When SensorX changes to "wet". Or if using a door sensor your trigger would be "When the DoorX is "closed".
The actions in the rule would be to send a notification to your phone, or additional actions like turn on a particular lamp.
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