Google PowerMeter in Russia. For sale or someone could implement something like this in DIY?

Question

Do it yourself

Once again I came across an article about Google PowerMeter , the existence of which has been known for a long time, but unfortunately, devices compatible with it have not appeared in Russia. The prices for a compatible European device AlertMe bite to say the least.
Judging by the topics in the DIY section on Habré, there are quite a few specialists, including and radio electronics. It is certainly quite feasible to create a compatible device consisting of a current transformer (for example, from disassembled current clamps) with a data transmission module in one way or another (including wireless) through a home eth router or a wifi router to the Internet. If it is not possible to repeat the transfer protocol, then you can develop your own server part for receiving, processing and displaying data.
The essence of the task is to assemble a similar or compatible device from discrete elements and disassembled spare parts, say from Chinese or domestic manufacturers with a budget of, say, up to $100.
I would like to hear all the possible methods of interaction between the modules installed inside the apartment and taking readings and transferring them to the Internet: Wifi / USB / BT / PLC / 802.15.4, etc.
PS to the Internet directly through a router and to monitor the energy consumption of the ENTIRE apartment, and not 1 device through a "smart" socket.

Answer 1

Not $100 of course, but all the same:
www.energometrika.ru/catalog/askue.html
but in general the problem is power, I have a fan speed controller with such a thing, in principle it displays on the screen in digital form, respectively, you can disassemble and remove data from there. The cost of this controller was something in the region of 2000 rubles, up to 800W

Answer 2

There is a way to keep within $100. Obsolete analog meters are bought up (almost for nothing), we hang a decoder on the main axis (for example, it is on the volume control knobs) and connect it to the Arduino with an Ethernet module. Everything. The device is ready.
It is possible to make a completely home-made electronic counter not more difficult. It's more of a calibration issue...
But the most difficult issue is certification. It must also comply with GOST. By the way, here is the GOST itself for electricity meters:
protect.gost.ru/nom.aspx?mode=doc&id=129290&nomentype=1&baseC=28&page=15&code=

Answer 3

The cheapest and toughest option is to hang a webcam above the main meter and monitor its readings. Automatically recognizing numbers, I think, is not a problem, not more difficult than captcha =) If desired, it can probably be implemented even without a computer, on microcontrollers. In general, the idea is interesting, it will be necessary to think ...

Answer 4

A bit messy, but here's what I'm currently working on.
These are small devices, about the size of a deck of cards. They have three analog inputs, 10 digital inputs and outputs. They also have an RJ-45 connector for a wire similar to a twisted pair (it will be possible to compress it like a twisted pair).
Each such device has its own unique address. Therefore, there can be thousands of such pieces of iron on one wire.
They receive power either from the bus or from an external 12-volt adapter.
These devices can be programmed so that they generate messages about some events on the network,
listen to messages from other devices and somehow react to them.
Node 1: my temperature has become +50!!!
Node2: oh so… turn on the damper!
Node-Indicator: A temperature message arrived - I'll draw it on the screen - with the sender's address
There is a node - an adapter from the bus to usb. A virtual comport appears on the computer -
messages from the network arrive in it. And through it you can send messages to this network.
The nodes are already now - they can measure temperature, volts, receive firmware via this network or via USB (if the node has USB)
. I ordered humidity sensors, presence sensors, temperature, stepper motors on ebay. I plan to supply the nodes
with a code for working as dimmers, for example.
Well, somewhere like this.
Concerning connection with the Internet. Everything is quite simple here - it’s either USB-> Internet (the same router with USB will do)
or one of my other pieces of hardware that have a connector in this bus and on the other side a GSM modem / SMS gate.
I will definitely write about this in more detail in order to collect ideas for who needs what. To realize.
Obviously, the idea of ​​measuring consumed electricity will fit into this system as it should.

Answer 5

Hey!
I don’t really remember the prices (it was a long time ago), but there is one suitable device:
Siemens SICAM P50
Through it, you can monitor everything and, plus, in the options when ordering, you can complete additional inputs / outputs.
The measured values ​​are in this manual, pages 38-41.
Not sure about $100, but it was inexpensive.
When asking for a price, do not confuse with SIMEAS P, they are much more expensive.