ČSN EN 13757-1

This European Standard specifies data exchange and communications for meters and remote reading of meters in a generic way.
This European Standard establishes a protocol specification for the Application Layer for meters and establishes several protocols for meter communications which may be applied depending on the application being fulfilled.
NOTE: Electricity meters are not covered by this standard, as the standardization of remote readout of electricity meters is a task for CENELEC.