31–40 of 137 posts
Tangential, but what other fascinating things can I do with an SDR dongle? I've had one for years and have not heard of this. * Listen to various radio stations * Track airplane positions * Receive weather images from a satellite what else? One other thing off the top of my head is combining ship position and cargo databases: https://github.com/marcdacosta/ambient-shipping
I hadn't heard of the company Sense before I read about this blog. I looked up their product... 300 bucks, are you kidding me? And it requires licensed installation on top of that, so maybe even more in labor. Who's buying this stuff and how is their margin defensible from Tesla or somebody selling Raspberry Pi kits for $25?
Its defensible because people are paying it...go on, you can buy the current clamps for a few bucks and make your own competitor for $25 a pop... you wont though because its easier to shit on things than actually do something.
Earlier quoted context omitted.
Because it took him that long in his first try doesn’t mean that holds true of everyone.
There's no way to tie the signal to a specific house without the serial number or a reading.
Very useful for automatically generating graphs based on data. Would have automated the whole "writing PHP + jQuery + SQLITE3" part entirely - and consume the JSON directly and created visualizations based on that.
* OWL power monitor with inductive clamp and separate LCD display (in the reduced bin at the local DIY barn), transmits data on 433MHz - £12 * Arduino Mega+ESP8266 combo board - £8 * Rflink Rx/TX board - order a kit or build your own ( http://www.rflink.nl/blog2/wiring ) 433 or 868MHz operation, can also work with some devices at 2.4GHz - About £15 * Rflink software ( http://www.rflink.nl/blog2/ ) + Serial link softw…
You can also buy clamp sensors that can be connected directly to a microcontroller (with an ADC - so not a Raspberry Pi without external hardware). http://www.homautomation.org/2013/09/17/current-monitoring-w...
[0] http://www.analog.com/en/products/analog-to-digital-converte...
>>I use PHP. There, I admitted it. Very happy to see stuff like this in blog posts. I use it all the time to stand up scripts like this. It makes me REALLY happy to see hacky code like: >>exec("/scripts/gocode/bin/rtlamr -msgtype={$type} --format=json --filterid={$unitid} --single=true",$output); I also do this all the time, even to control Windows processes on client/slave machines (generally killing and relaunching…
> Some research told me that the power company accomplishes this via a simple radio broadcast on the 900Mhz spectrum. Interesting. Around here (mainland Europe) they're currently installing "smart" meters which do this using CPL rather than radio. > And with one simple command, I was reading the power (and probably water) meters for my entire neighborhood That is a bit troubling from a physical security perspective,…
What about thieves going around selecting data and pinpointing the house the one with the least consumption so they can find out if you are absent or not. Incredible techonology
> Some research told me that the power company accomplishes this via a simple radio broadcast on the 900Mhz spectrum. Interesting. Around here (mainland Europe) they're currently installing "smart" meters which do this using CPL rather than radio. > And with one simple command, I was reading the power (and probably water) meters for my entire neighborhood That is a bit troubling from a physical security perspective,…