[sudo-discuss] TED The Energy Detective AC power monitors

[Cere Misc]

Hell ya.  Sounds like fun!  Here's an Arduino library that seems like it
would do the job.
http://www.airspayce.com/mikem/arduino/RadioHead/classRH__ASK.html

On Thu, Aug 4, 2016 at 12:32 AM, Jake <jake at spaz.org> wrote:

> I opened up the black box that connects to the current-sense transformers
> included with The Energy Detective (TED) power monitor kits.
>
> it contains a CS5460 chip which is a "Single Phase Bi-Directional
> Power/Energy IC" which has a digital (SPI) data interface.  Unfortunately
> it does not have analog outputs, so it can't be used to convert the AC
> current signals coming into it into a simple DC analog value.
>
> http://pdf1.alldatasheet.com/datasheet-pdf/view/230848/CIRRUS/CS5460.html
>
> however, if someone finds a nice arduino library to talk to this chip, we
> can...
>
> wait no, that's pointless.  the chip is connected to a PIC16F627A which is
> processing the data from the CS5460 and then sending it out over the power
> lines using a TDA5051AT "Home automation modem" chip:
>
> http://www.nxp.com/documents/data_sheet/TDA5051A.pdf
>
> "The TDA5051A is a modem IC, specifically dedicated to ASK transmission by
>  means of the home power supply network, at 600 baud or 1200 baud data
>  rate. It operates from a single 5 V supply."
>
> it transmits Amplitude Shift Keying (ASK) data transmission using the
> electric power lines it's connected to.  basically it communicates at
> 8.48MHz (somewhere between 6.08 - 9.504 MHz) in binary serial
> communications.  so it should be pretty easy to figure out what it's saying.
>
> It could be that the box that the current sense transformers plug into
> just sends data (including its serial number, which is on a barcode label
> stuck to the box) and a displaybox (or our hack) picks it up or not.  But
> it's also possible that it waits for a displaybox to transmit a signal
> telling it to turn on, or asking it to supply a measurement on-command.
>
> since we have displayboxes and these current sense boxes, we can find out
> if we want.  and then we can measure power flow throughout the omni.
>
> -jake
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