Brad Fitzpatrick (brad) wrote,
Brad Fitzpatrick
brad

AC switching, monitoring...

My sewer's sump system has 3 pumps...
  • 2 in big tank. These have float sensors and only turn on when the fluid level is high enough. Only one needs to be on at a time. Ideally, I should have a switch box install that makes sure only one gets power at a time, switching it back & forth every so often. Otherwise if one is installed just a millimeter above the other, one will always get all the work and the second will never go, and so they won't wear equally.
  • 1 in little (rainwater?) tank. Also has a float sensor.
My deck is currently still torn apart because I'm still paranoid that once I close it, something will break again and I won't notice.

I'd like to be able to remotely monitor (and/or get alerts) about the pump health.

Here's what I propose (and what I need help on)....

Small Linux box (Mini-ITX or Gumstix) in a water-proof box, with WiFi, with serial ports (or Serial over USB), controlling X10 Universal Adapters (if they're strong enough for the amperage?), or controlling some relays.

So yes, I could do the switching between the two tanks from the computer with just a remote relay control, including varying the offsets, such that one pump doesn't always get the same hours of the day, but what I actually want to do is measure the power draw per-pump.

Basically I want to make sure the pumps' floats and motors are still working, by measuring the power draw on each of the three plugs.

Any ideas how I can measure this?

I'm also willing to pay somebody to build me some Serial/Parallel/USB device to do this, if any CSE-types are out in the audience. I'd rather spend a couple hundred on a solution that makes me happy, than spend a few hundred on a switching box and seal up the deck and never know if it's going to blow up again (or already has!).

Thanks!
Tags: hacks, house, lazyweb, tech
Subscribe
  • Post a new comment

    Error

    default userpic

    Your reply will be screened

    Your IP address will be recorded 

    When you submit the form an invisible reCAPTCHA check will be performed.
    You must follow the Privacy Policy and Google Terms of use.
  • 18 comments