Energy monitor from existing CT's

[gigaguy]

I was wondering if I could just tap into the CT directly, via arduino/mysensors.

I am doing something similar with my alarm system. leaving it intact and functional, but piggybacking off the door sensors at the panel. (uses voltage levels)

[RJ_Make]

@gigaguy Here is one of my projects, it may give you are start.

http://forum.mysensors.org/topic/573/refrigeration-datta-logger-a-non-mysensors-project

[gigaguy]

Thanks @ServiceXp That does help some.
I guess i dont understand how to connect the ct to the arduino. I see your setup (burden resistor, etc). But since these are already installed, and connected via 110v into the wiser device. I dont want to also add the 5v from the arduino.

I do have access to the CT wires coming into the device. Would I just connect at that point (while leaving them connected to wiser) and then just wire it up to arduino as if it weren't connected to anything else?

I do have some more CT's coming in the mail, and will just setup a 2nd set of CT's if I cant get it working this way. Just seems like a waste to double them up.

Measuring the ct wires via voltmeter. The only reading I got was from the 200ohm setting. The reading was 4.1. Not sure this helps. Maybe I am reading/using it wrong.

Not sure if this made any sense.

[RJ_Make]

@gigaguy I don't think you will be able to run simultaneously.

[gigaguy]

@ServiceXp Thanks. Thats what I was trying to find out.

[ewgor]

Hi all,
I have a sct-013-000 and I have already my board prepared with all needed resistors, followed the open energy monitor.
I would like to ask here if some one integrated this with openhab and mysensors!
Any advice will be kindly appreciated.
Thanks all.

[ewgor]

Here nobody too? Please help!

[gigaguy]

@ewgor I never got this working. Issue was with my board, ct, etc, not openhab. I dont see any reason openhab would have any issues with it.

[ewgor]

@gigaguy i was asking for help building a new and simple system using one ct sensor to get 3 values in openhab: instant power in watts, energy consumption up to date in kWh and the total energy consumption starting with the app upload in kWh. I don't want to see volts or amps!
The problem is that I don't know how to combine the emoncms example with mysensors and than to create rules in openhab!
As you have already a energy monitoring in your house you just need to find a way to combine all together in one app like openhab.

[gigaguy]

@ewgor, like I said, I couldnt get mine built. Not sure what i did wrong. I got values, but they were the same whether current was going through or not. So i kind of gave up on it for a while. I too need some help getting it built.