At Volkszähler you can read data from some of the network operators' meters using a D0 reader. This data can then be made available to the cFos Charging Manager with vzlogger.
vzlogger provides a JSON file with current counter values. An example file can be found here: vzlogger-out.json (as ZIP archive).
To be able to read them with the cFos Charging Manager, you need to create a customised meter definition file and then upload it as a Customised Meter. An example file can be found here: cfos-meter-vzlogger-bi.json (as ZIP archive).
vzlogger creates an element in the array "data" for each counter value. The values are then accessed as
The order in which the meter values appear in the JSON file depends on the order of configuration in vzlogger. If you operate a meter with a positive and negative sign of the power for mains supply (positive) and feed-in (negative), you must apply the following patch for vzlogger and compile vzlogger accordingly: https://github.com/volkszaehler/vzlogger/pull/476.