This subject is technical and aims to understand the features and benefits of these new meters but also the risks and abuse that these features could bring! Incidentally, we already read this interesting article http://www.bastamag.net/article890.html recounting the Swedish and Italian case (thank you Gegyx)
Regarding the controversy over the cost of meter replacement, refer to the orginal topic: https://www.econologie.com/forums/compteurs- ... t9744.html
So I began collecting information by a very general extract of S & V from January 2010:
A datasheet of Siemens electronic electricity meter is available here. It shows the main functions of the electronic counter, the communication "remote" which is the main
First question, what is the carrier of information online linky?
The telephone line or the current? And in case of communication breakdown? The current is cut?
According to this scheme it is a hybrid system using the electric power line to a relay which pass through the GPRS after:
Excerpt from datasheet above:
6.2.2 Link Characteristics
The principle of communication is an amplitude modulation in all or nothing from one carrier to 50 kHz. The logic is negative.
- A bit transmitted to "0" corresponds to the presence of carrier during the corresponding time.
- A bit transmitted to "1" corresponds to the absence of a carrier for the corresponding time.
After demodulation, there is a conventional asynchronous link with characteristics
are the following:
- 1200 transmission speed bit / s
- Coding all the information in ASCII format (displayable)
-> 7 bits to represent an ASCII character
-> 1 parity bit, even parity (even)
- A start bit before each character "0" logic
- A stop bit after each character "1" logic
Are some pirates who are going to have a field day !! To be continued ...