Omnistat2 Motion?

[cruggiero]

I have 5 Omnistat2 Thermo's. Is there a way to use the motion detection in them and trigger something in omnipro (like lights, etc)?

I know I could add motions and plan to do so, but was hoping that I could essentially use each omnistat as a motion too.

 

[PaulD]

The Omnistat motion detector is very short and narrow range compared to a normal PIR. Mine are on a wall in large rooms which also have PIR's and they do not provide coverage like the PIR's do. Even if you could hack it, it would only be useful in a confined area such as a hallway.

I would like to see that same feature on my keypads.

 

[cruggiero]

I guess I'm just going by when the light comes on. All of mine are pretty sensitive (or seem that way) and the light comes on as you walk past it, which tells me the motion is triggered.

 

[PaulD]

All of mine are pretty sensitive (or seem that way) and the light comes on as you walk past it, which tells me the motion is triggered.

Correct. However, try walking past it about 8-10 feet away and it will not trigger.

 

[cruggiero]

I guess my point is that my thermo's are in locations in which the motion is triggered as you enter/exit a room and am trying to take advantage of the motion triggered
inside of them.

I was just hoping there was a way to do this instead of having to install motions at pretty much the same location.

 

[AnthonyZ]

I guess my point is that my thermo's are in locations in which the motion is triggered as you enter/exit a room and am trying to take advantage of the motion triggered
inside of them.

I was just hoping there was a way to do this instead of having to install motions at pretty much the same location.

One, you can adjust the motion's sensitivity via the menus. Two, while I haven't done this (I have no need to), I don't see why you couldn't hack it. If you open the stat, you'll clearly see the pins (easily soldered to) on the PCB, directly behind the PIR. You would either need to follow the traces or remotely power the stat with a 24V AC PS and trip it to determine the pin out. Once done, you should be able to interface the PIR to your HA system. Depending on the results, you may have to introduce a transistor or relay into the mix but, it all seems quite doable.

Now that I think about it, I may have to try this (with all my spare time... )

 

[RArbour]

I guess my point is that my thermo's are in locations in which the motion is triggered as you enter/exit a room and am trying to take advantage of the motion triggered
inside of them.

I was just hoping there was a way to do this instead of having to install motions at pretty much the same location.

One, you can adjust the motion's sensitivity via the menus. Two, while I haven't done this (I have no need to), I don't see why you couldn't hack it. If you open the stat, you'll clearly see the pins (easily soldered to) on the PCB, directly behind the PIR. You would either need to follow the traces or remotely power the stat with a 24V AC PS and trip it to determine the pin out. Once done, you should be able to interface the PIR to your HA system. Depending on the results, you may have to introduce a transistor or relay into the mix but, it all seems quite doable.

Now that I think about it, I may have to try this (with all my spare time... )

AnthonyZ,
While your logic seems accurate, I can assure you it is not that simple. The PIR is very sensitive, operates at microvolt threshold. There is some very sensitive electronics between the PIR and the micro and adding additional components can very easily throw off this balance . I am not saying it is not possible, but it will not be as simple as checking a pin to see if it goes high/low. Not to mention the lens was specifically designed to have a short narrow range.

Good luck if you try it, I just wanted to warn you from my experience that is it a lot more difficult than it appears.

Ryan

 

[AnthonyZ]

Fair enough, Ryan. Thanks for the warning. Frankly, I have way too little time for this hack anyways and I sure don't want to brick my lovely stat!