navigation buttons. The internal firmware offers secure communication and offers safety
from external influence.
3.5.1. Firmware and security
The Firmware architecture ensures protection of legally relevant metrological functionality
within the micro controller from manipulation. It also allows flexibility to the non-
metrologically relevant functionalities and communication options that are essential for the
smart metering application.
The protection is based on multicore micro controller. The firmware architecture offers a
secure and robust design for the software interaction by isolating the sensitive and legally
compliant files from the rest.
Figure 10. System Architecture
As the meter deals with legally relevant information and other operational parts, it is designed
to fulfill the highest security standards for the metering components.
LNR part consist of application and communication components and peripherals. Separated
with a protected interface, the legally non relevant part of the Firmware is used for BLE
communication, Application etc.
LR the legally relevant section of the firmware is separated using protected interface to keep
it isolated from the legally non relevant part. This part of the firmware consists of components
for buttons and display screen. Some other sensitive components are the metrology chip and
security chip.
The E-Mon® Energy Meter operates within a network and the security setup shall be
performed to restrict unauthorized access. Kindly go through installation and security best
practice guidelines and safeguard your network from outside interference or external attack.
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