iotsaSmartMeter reads electricity and gas usage of a dutch Smart Meter through the standardised P1 port and makes the data available on the net.
Home page is https://github.com/cwi-dis/iotsaSmartMeter. This software is licensed under the MIT license by the CWI DIS group, http://www.dis.cwi.nl.
Details on the standardised P1 port on dutch smart meters (including protocol, pinout, etc) can be found at http://files.domoticaforum.eu/uploads/Smartmetering/DSMR%20v4.0%20final%20P1.pdf
- Arduino IDE, v1.6 or later.
- The iotsa framework, download from https://github.com/cwi-dis/iotsa.
- a iotsa board.
- A RJ25 6P6C connector (often incorrectly called RJ11 6P6C).
Note: the code compiles on esp32, but this is untested (as of January 2021).
Instructions for constructing the hardware are provided in the extras subfolder. p1reader-board.pdf has the hardware diagram for the iotsa board. The Fritzing project is also available as p1reader-board.fzz.
The P1 port provides power, but unfortunately not enough for the ESP-12 to operate under all circumstances, so you will have to add an external power supply.
Unless you have used different GPIO pins there is nothing to configure.
The P1Parser class parses most common P1 fields. If there are more fields you want: modify P1Parser::next(), after consulting the P1 documentation referenced above.
Compile, and flash either using an FTDI or over-the-air.
The first time the board boots it creates a Wifi network with a name similar to config-iotsa1234. Connect a device to that network and visit http://192.168.4.1. Configure your device name (using the name smartmeter is suggested), WiFi name and password, and after reboot the iotsa board should connect to your network and be visible as http://smartmeter.local.
Accessing http://smartmeter.local/p1 will read a raw P1 telegram in text format.
Accessing http://smartmeter.local/p1?format=xml will read a P1 telegram and return the data in XML form.
Accessing http://smartmeter.local/p1?format=json will read a P1 telegram and return the data in JSON form.
Each call will result in a new telegram being requested from the smart meter, so there may be a delay of up to 10 seconds before the data is returned (as per the P1 standard).